Manual ALS606 R0
Notes:
Version 0A
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Contents
Introduction ................................................................................................................................................................... 5
Amplifier Features......................................................................................................................................................... 6
Quick Start..................................................................................................................................................................... 7
Installation and Operation ............................................................................................................................................. 7
Power Line or Mains Connections............................................................................................................................ 7
ALS-600SPS........................................................................................................................................................ 7
ALS-600PS .......................................................................................................................................................... 8
Radio and Antenna Connections ................................................................................................................................... 9
Operation ................................................................................................................................................................ 10
Alerts.................................................................................................................................................................. 10
General Operation ....................................................................................................................................................... 13
Power Supply and Power Requirements...................................................................................................................... 13
ALS-600PS ........................................................................................................................................................ 13
ALS-600SPS...................................................................................................................................................... 13
Power Line Requirements....................................................................................................................................... 14
Power Supply Location...................................................................................................................................... 14
Amplifier Overview..................................................................................................................................................... 15
Installation ................................................................................................................................................................... 16
Installation Clearances............................................................................................................................................ 16
Installation Warnings.............................................................................................................................................. 16
Accessory Equipment and Devices.................................................................................................................... 16
Installation, Wiring, and Connections................................................................................................................ 16
Station Ground ................................................................................................................................................... 17
Safety and Lighting Grounding.......................................................................................................................... 18
Coaxial Line Isolators ........................................................................................................................................ 18
Operating Frequency Range ................................................................................................................................... 19
MARS or CAP Operation .................................................................................................................................. 19
Warning Lights ....................................................................................................................................................... 20
Interconnection Wiring................................................................................................................................................ 21
Front Panel Controls ............................................................................................................................................... 22
Back Panel Connections ......................................................................................................................................... 23
Initial Operation .......................................................................................................................................................... 25
ALC Adjustment..................................................................................................................................................... 26
Power Supply Line Voltage Settings........................................................................................................................... 27
ALS-600PS Voltage Settings.................................................................................................................................. 27
ALS-600SPS Voltage Settings ............................................................................................................................... 28
ALS-606 Functional Overview ................................................................................................................................... 28
General Operation................................................................................................................................................... 28
ATTENUATOR BOARD.................................................................................................................................. 29
PA Amplifier...................................................................................................................................................... 29
1KWF6 Low Pass Filter Assembly.................................................................................................................... 30
Control and Protection Logic ............................................................................................................................. 30
SWR Directional Coupler .................................................................................................................................. 30
Circuit Boards......................................................................................................................................................... 30
1KWF6 .............................................................................................................................................................. 30
BSW3................................................................................................................................................................. 30
CB2 .................................................................................................................................................................... 31
MB2 ................................................................................................................................................................... 31
PAM-606 ........................................................................................................................................................... 31
PD8m ................................................................................................................................................................. 31
RJ45 ................................................................................................................................................................... 31
RLY ................................................................................................................................................................... 31
SWR................................................................................................................................................................... 31
Schematics................................................................................................................................................................... 32
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Filter 1KWF6..................................................................................................................................................... 32
Bandswitch BSW3 ............................................................................................................................................. 33
SWR Directional Coupler Board ....................................................................................................................... 33
Control Board CB2 ............................................................................................................................................ 34
Metering Board MB2......................................................................................................................................... 35
PA Module PAM-606 ........................................................................................................................................ 36
Power Attenuator PD8m .................................................................................................................................... 36
Interface Connections RJ45 ............................................................................................................................... 37
Relay Board ....................................................................................................................................................... 37
ALS-600PS Power Supply................................................................................................................................. 38
ALS-600SPS Switching Power Supply ............................................................................................................. 40
ALS-606 Limited Warranty......................................................................................................................................... 44
Tables
Table 1 Quick Start Fault Alarms................................................................................................................................ 11
Table 2 Band Frequency Ranges ................................................................................................................................. 19
Table 3 LED Alarm Indicators .................................................................................................................................... 20
Table 4 ALS-600PS Voltage Settings ......................................................................................................................... 27
Table 5 ALS-600SPS Jumper Settings ........................................................................................................................ 28
Figures
Figure 1 Quick Starts Typical Wiring ......................................................................................................................... 12
Figure 2 Amplifier Interconnection ............................................................................................................................. 21
Figure 4 Front Panel .................................................................................................................................................... 22
Figure 3 ALS-606 Back Panel..................................................................................................................................... 23
Figure 5 ALS-600PS Board......................................................................................................................................... 27
Figure 6 ALS-600SPS Board Diagram ....................................................................................................................... 28
Figure 7 1KWFL6 Filter Board ................................................................................................................................... 32
Figure 8 Bandswitch BSW3 ........................................................................................................................................ 33
Figure 9 SWR Power Sensor Board ............................................................................................................................ 33
Figure 10 Control Board CB2 Part 1 ........................................................................................................................... 34
Figure 11 Control Board CB2 Part 2 ........................................................................................................................... 34
Figure 12 Meter Board MB2 ....................................................................................................................................... 35
Figure 13 PA Module PAM-606 ................................................................................................................................. 36
Figure 14 Attenuator PD8m ........................................................................................................................................ 36
Figure 15 TR Relay Board .......................................................................................................................................... 37
Figure 16 ALS-600PS Power Supply .......................................................................................................................... 38
Figure 17 ALS-600PS Board....................................................................................................................................... 39
Figure 18 ALS-600SPS Main Wiring.......................................................................................................................... 40
Figure 19 ALS-600SPS AC/DC Section ..................................................................................................................... 41
Figure 20 ALS-600SPS Board Driver Section ............................................................................................................ 41
Figure 21 ALS-600SPS Board AC/DC Section 2 ....................................................................................................... 42
Figure 22 ALS-600SPS Board DC/DC Section .......................................................................................................... 42
Manual Version 0A 04/12/17
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Introduction
Thank you for purchasing this amplifier system.
The ALS-606 is a compact 600-watt nominal PEP output amplifier. It uses an external
power supply system. This amplifier covers 160-6 meters. Nominal drive power is 75watts or less. NOTE: This amplifier excludes all operation between 25 and 28 MHz.
The ALS-606 interfaces with most modern amateur radio transceivers. Supported band
data input includes ICOM compatible analog voltage, Elecraft and Yaesu BCD band
data, and Kenwood serial data. With proper interface cables and data, this amplifier will
automatically change bands in step with transceiver band changes. Automatic band
selection using a band data port or band decoded bus requires purchasing an Ameritron
interface cable for your radio.
Carefully unpack this amplifier and power supply. Please inspect everything for physical
shipping damage; this includes cabinets and chassis. Ameritron does not package
dented or damaged units. Cabinets and controls can be broken, bent, or dented with
rough handling. If a new unit arrives mechanically damaged, including broken knobs or
switches, it is always from handling somewhere between Ameritron and the end user. In
the event of cabinet damage or broken controls, please contact the dealer immediately.
To permit claim processing, retain all boxes and packing materials.
The Ameritron ALS-606 is 600-watt nominal output, 160 through 6 meter amateur radio
band, solid-state amplifier. The ALS-606 uses four 50-volt linear RF MOSFETS. These
MOSFET’s are specifically designed for linear power amplifier applications, rather than
non-linear or pulse service. They provide lower SSB distortion when compared to nonlinear application solid-state devices in SSB service. Fan speed is regulated by
temperature sensors; assuring conservative cooling with minimal noise.
Nominal driving power is 75-watts for 600-watts output (approximately 9 dB gain) on
most bands. The compact 9-1/2” wide by 7” high amplifier package (depth only 14”) fits
nearly any station configuration. This attractive desktop amplifier unit weighs
approximately 15 pounds.
An external 50-volt 25-ampere CCS power supply powers the ALS-606. Two different
supplies are available. The ALS-600SPS switching regulated supply and the ALS600PS unregulated supply. These supplies operate on all standard residential power
line voltages.
Caution: This amplifier has an FCC mandated automatic disconnect and other features
preventing 27-MHz operation. There is no available circuitry or control provision to
circumvent this lockout.
Please read the manual completely and understand the operations before trying
to operate this amplifier.
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Amplifier Features
This amplifier provides the following standard features:
ɀ 160 through 6-meter operation, full-power on six meters.
ɀ Four conservative linear-service rated 50-volt MOSFET transistors.
ɀ New push-pull stripline PA layout with exceptional VHF performance.
ɀ Energy-efficient solid-state design greatly reduces heat, <100-watts power line
draw on receive.
ɀ Exceptional harmonic suppression.
ɀ Operational in a few seconds, no long filament warm-up time.
ɀ Clean layout with easy-to-service modular construction.
ɀ Quiet variable-speed forced-air cooling system.
ɀ Power module current and voltage meters with LED illumination.
ɀ Accurate PEP Forward and PEP Reflected output power metering.
ɀ Reflected power protection.
ɀ Thermal overload protection.
ɀ Bandswitch error protection.
ɀ Easy to understand front panel LED indicators for rapid fault-error diagnosis.
ɀ Standard negative-going ALC output with front panel adjustment.
ɀ ALC metering and ALC LED indicator.
ɀ Fully-regulated external switch mode power supply, or linear unregulated supply.
ɀ Compact size 14” deep x 7” high x 9.5” wide.
ɀ Weight amplifier section 15 pounds.
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Quick Start
Installation and Operation
WARNING: Do not block ventilation holes. Do not expose to moisture,
water, or external heat.
This power amplifier system consists of two units, a power supply and an amplifier
section. The amplifier section has metering and operator functional controls. Locate the
amplifier section at a convenient place with proper space for airflow, within the
operator’s reach and view. The power supply can be placed anywhere within cable
length limits. Do not extend the amplifier power supply dc power cable.
Power Line or Mains Connections
There are two distinctly different power supplies available for the ALS-606. The ALS600PS is more basic unregulated choke input supply. The ALS-600SPS is a state-ofthe-art regulated switching mode supply. Please read the appropriate sections below.
For non-export use, each supply comes with a standard NEMA 5-15P two-blade 120V
15A plug with round safety-ground pin.
Overall amplifier operation remains similar with either supply; except the linear supply
has a RTTY and Normal voltage switch. The RTTY position allows higher amplifier
efficiency at reduced power. See the power supply details included with the particular
power supply for details specific to each supply. This includes operation on various line
voltages, power supply operation, fuse selection, location, and power supply trouble
shooting.
Non-export versions of Ameritron ALS-600 series power supplies are wired and fused
for 120Vac USA power mains, but all are modifiable to other standard power mains
voltages.
ALS-600SPS
The USA standard version ALS-600SPS is supplied wired for 95-135 Vac, 50-400 Hz,
15-ampere or larger electrical service. Reconfiguring internal jumpers on the power
supply board will allow 185-260 volt operation.
The ALS-600SPS is internally regulated. Beyond 120 or 240V concerns, the ALS600SPS does not require voltage tap changes. There should be very little change in
HV1 (PA voltage) with amplifier power and line voltage. Less than 3 volts change from
the 50Vdc nominal voltage is acceptable.
Do not operate with line voltage below 95 or above 135 volts when wired for 120 volts,
or below 185 or above 260 volts when wired for “240 volts”.
Unless power mains fall below 100 volts, the ALS600SPS switching supply provides the
same performance on 120-volts as on 240-volts. The only function reasons for 240-volt
power mains are light dimming and unintentional circuit breaker opening. If outlet wiring
is already loaded heavily, or if house wiring is sized too small for the distance to the
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mains supply, you may have to use a dedicated 120-V amplifier line, or rewire the
supply and use 240-volt mains.
With 120Vac mains at 600-watt nominal RF output, current draw is approximately 12
amperes on steady carrier. Peak line current is typically much less than 8 amperes at
600 watts PEP on SSB voice.
The ALS-600SPS can be located anywhere, within reach of interfacing cables,
convenient to your operating setup. The location must be dry, airflow must not be
restricted, and outside temperature must not be over 120F (49C). You must not extend
or shorten the amplifier to power supply cable.
Exceeding safe power supply load current forces the switch mode supply into shutdown.
Restore operation by turning the main power switch off for a brief time. If the power
supply detects a permanent overload or the supply has failed, the supply will not reset.
ALS-600PS
The ALS-600PS uses a standard transformer with choke input filter system. It weighs
significantly more than the ALS-600SPS, and is not voltage regulated.
The ALS-600PS requires a 100-130 Vac, 50-60 Hz, 15-ampere or larger mains supply.
This supply is reconfigurable for 210-250 volts by moving internal jumpers. The line cord
uses a standard USA NEMA 5-15P two-wire male plug with safety ground.
This supply is unregulated. Voltage range includes all typical residential power line
voltages, but the internal buck-boost winding must be reconfigured if output voltage is
more than 58 volts no load. Operation with no load voltages over 58 volts can
compromise FET reliability.
With 120Vac mains, current draw with steady 600-watt carrier is typically around 12
amperes. Line current is typically less than 8 amperes at 600 watts PEP SSB voice.
The ALS-600PS normally provides the same performance at 120-volts as at 240-volts,
unless the power mains have excessive voltage drop. If you experience light dimming or
line breaker opening, move the supply to a dedicated 120-V line, or reconfigure the
supply for, and use, 240-volts.
This supply does not have overload protection, other than standard fuses.
See the “Power Supply Line Voltage Settings” starting at page13 for changing the line
voltage settings.
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Radio and Antenna Connections
WARNING: Forcing connector engagement can result in permanent connector
damage. Solder on the outside of center pins or bent pins are primary causes of
female connector damage. External solder or bent center pins can permanently
damage the female.
Do not use Line Isolators on amplifier RF cables. The chassis of the amplifier should
be at the same RF potential as all other desk equipment. Shield isolators allow
equipment to float to different RF chassis potentials. Different chassis potentials are
exactly what we do not want, and isolators on desk coaxial cables encourage differing
enclosure RF voltages. It is better to cure RF problems outside the operating position.
RF connections are through standard UHF female connectors. Use 50-ohm coaxial
cables with quality, properly soldered, UHF male (PL259) connectors. The output cable
must safely handle at least 600 watts.
Examine the RF connectors. Female SO-239 UHF connectors have notches on the
outer threaded-area edge. PL259 UHF males have protruding tabs on the metal outside
the center-pin insulator. These tabs and notches prevent unwanted connector rotation.
The male tab or tabs must align and fit into female notches. This interlocking prevents
connector rotation. It is best achieved by slightly wiggling or rotating the cable while
hand-tightening the male’s shell to seat the male tab into the female notch.
With a firm handgrip, while making sure the PL259 male connector tab interlocks with
the amplifier’s SO-239 chassis connector notch, gradually tighten RF connectors. Do
not use excessive force on connectors. Check for proper tightness and seating by
wiggling and flexing the cable and watching for any male connector movement on the
female. Properly seated, connectors will be solidly locked without use of pliers or tools.
ALC and Relay (keying or TX line) connectors are standard phono females. Phono
males from external cables should push directly in with a snug, but not overly tight.
The Relay line operates with low voltage (<12V) and low current (<20 mA). Transmit is
enabled by pulling the Relay line to ground with a relay contact or transistor. Read your
radio manual. Unless you have a very unusual radio, your radio should directly key this
amplifier. Avoid using external interfaces with relays. Amplifier relay switching time is
approximately 10-12 mS.
The remote and radio band data connectors are specialized connections. They are for
use with Ameritron supplied cables only.
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Operation
Before attempting operation:
This amplifier is optimized for 50-ohm loads. Be sure your antenna system 50-ohm
SWR is as low as possible. As SWR increases from 1:1, either heat or distortion will
increase.
Be sure your antenna system, including any switches, baluns, matching circuits, or
lighting protection devices, are in good condition and will safely handle high power.
Connectors, cables, and antennas must not have loose connections or insulation
failure issues.
Your exciter must be adjustable to significantly less than 100-watts output. Start at 50
watts maximum drive power and increase or decrease drive to reach desired power.
Do not exceed 25 amperes or 600 watts, and do not drive into non-linearity on SSB. A
trapezoid scope pattern is recommended for drive adjustment. Overdriving results in an
excessively wide signal, and overdriving can damage the amplifier.
Power mains should be reasonably stable and match power supply voltage wiring.
The low pass filters cut off just above the traditional primary amateur bands. A primary
band’s filter is used on the next lower WARC band. For example, the 20-meter low
pass filter is used on 30 meters. Some radios do not supply enough band data to know
the exact band. With these radios, amplifier band data displays the next higher
primary band above the radio’s WARC band. If you are using such a radio, do not be
alarmed if 15 meters illuminates when the radio is on 17 meters. This is still the correct
filter.
The amplifier will automatically attempt to reduce power if it appears thermal limits will
be reached.
The amplifier will shut off with an incorrect band selection, high antenna SWR (even for
an instant), if safe thermal limits are reached, or with catastrophic failures.
The ALS-606 reads peak envelope power on forward and reflected RF power scales.
Alerts
This amplifier has front panel alert codes using the SWR, PA, TX, warning LED’s and
bandswitch band indicators. When a fault code appears, the amplifier is disabled. When
an operating problem is corrected, operation is restored and alerts canceled by moving
the front panel Standby/Operate switch to Standby.
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The following table applies to faults:
Warning
light Steady
Warning
light Flash
Fault
SWR
TX
Antenna
Power
SWR, PA
Band
Wrong filter
Cause or Cure
Reflected High
antenna
SWR
or
intermittent antenna or feed line
connection
Filter input SWR
PA, TX
10M,
TX
PA FET too hot
PA, Illegal 11 meter
REM, PA
Exciter
or
amplifier
on
incompatible band, filter failure
Excessive power for duty cycle
or SWR, lack of proper airflow
Excessive 27 MHz signal level
No data or bad band Defective or improper remote
data when on remote
cable, or bad radio band data
information
Table 1 Quick Start Fault Alarms
With proper station installation, and with low antenna SWR, amplifier operation is
straightforward:
Set the bandswitch to the desired band. This happens automatically in the REM position
with a suitable radio interface cable. Set ALC full clockwise. Turn the amplifier power
switch ON, but leave the amplifier in STANDBY.
Set the exciter or transceiver to 50 watts carrier power. This power should show on the
amplifier’s FORWARD POWER meter. REFLECTED power should be very low.
Move the amplifier standby-operate switch to OPERATE.
Transmit while watching the Forward Power reading, quickly adjust exciter power for
less than 25 amps Id current, or less than 600-watts power output.
For high duty cycle modes and long transmissions, or if linearity is a problem, reduce
power. The amplifier has overload protection circuits, and will also attempt to reduce
power if the FET’s approach un-safe limits, but it is best to not rely on protection.
Adjust ALC to limit either forward power or amplifier PA current to a desired value at or
below maximum ratings, counterclockwise reduces power and current. The ALC light
should just flicker if ALC is limiting power properly. If the ALC light is on almost
continuously, reduce the transmitter’s power output setting.
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Figure 1 Quick Starts Typical Wiring
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General Operation
Power Supply and Power Requirements
ALS-600PS
Power Supply Features
Normal operating range is from 100 volts up to 130 volts 50/60Hz (12-amperes
typical full carrier power) or between 200 and 250 volts, 50/60Hz (6 amperes
typical at full carrier power).
A unique "buck-boost" winding allows compensation for up to six different power
line voltages centered on 115 and 230 volts. This versatile Ameritron feature
maintains optimum voltages on the amplifier components for maximum
performance and life
The ALS-600PS standard power supply uses an input choke to provide low
power factor loading on power lines. This reduces the peak currents drawn from
the line and improves the voltage regulation of the supply. This makes the ALS600PS generator and inverter friendly within the acceptable power line frequency
range of 50 to 60 Hz
Step-start to limit stress on power supply components
An illuminated cross-needle meter monitors 50V line output voltage and current
Weight 33 lbs.
ALS-600SPS
Power Supply Features
Efficient operation from 100-130 volts ac (12 amperes typical at full output power)
Low standby and receive power drain, typically less than 100-watts
Generator and inverter friendly with acceptable power line frequency range 40 to
400 Hz
Fully-regulated current-limited outputs
Excellent voltage regulation
Exceptional filtering and RFI suppression eliminates receiver birdies common to
most SMPS
Light weight 13 lbs.
Inrush protection
An illuminated cross-needle meter monitors 50V line output voltage and current.
The ALS-606 external power supplies contain 14-volt positive and negative supplies, as
well as a 50-volt 25-ampere continuous (30-ampere peak) main supplies. The ALS-606
PA (power amplifier) module operates from 50-volts, giving a total dc supply rating of
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1250 watts average power and 1500 watts peak dc power. The 12-volt supplies are for
illumination, bias, and control functions.
Power supply to amplifier interconnections are through a heavy-duty cable using reliable
Cinch Jones connectors.
Power Line Requirements
This amplifier ships wired for a nominal mains voltage of 120 Vac with either supply.
Maximum power line current at full power output is 12 amperes at 120 volts. 250-volt
rated 15-ampere fuses protect the power line. Always use 125V or 250V line fuses.
The linear supply requires changing taps for different line voltages. The switching power
supply is voltage regulated, current limited, and automatically adapts to any mains
voltage between ~95 Vac and 135 Vac. The ALS-600SPS switching supply does not
require adjustments or voltage tap changes.
See the “Power Supply Line Voltage Settings” starting at page13 for changing the line
voltage settings.
Note: 240-volt power mains operation is possible. This will not normally increase power.
Because average power is very low, SSB operation is generally unaffected by 120- or
240-volt operation. 240-V fuse size is 8-amperes maximum, fast blow only. The fuse
must have a voltage rating of 250VAC
Power Supply Location
Locate the power supply in a ventilated area convenient to the amplifier location. Avoid
placing the power supply next to sensitive equipment, such as audio processors,
transceivers, or microphones. For safety, ground the wing nut stud on the supply rear to
the station ground buss. The station ground buss should comply with National Electrical
Codes. NEC safety and fire protection codes mandate direct bonding of station grounds
to the home power line entrance ground. Station ground rods not directly bonded with a
low impedance connection to utility entrance grounds will increase equipment or
property damage, and increase personal risk, significantly.
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Amplifier Overview
The Ameritron ALS-606 is a solid-state, 600-watt nominal RF output power, 1.8-54 MHz
amplifier. The ALS-606 meets or exceeds all FCC requirements governing amateur
radio external power amplifiers.
The ALS-606 uses four low-distortion MRF-150 (or equivalent) SSB RF power
transistors in push-pull parallel. Ameritron recommends running 600 watts or less peak
power for maximum linearity and component life. It is always a good idea to use an
oscilloscope to verify proper linear SSB operation.
Protection circuitry reduces power as transistors approach conservative thermal limits,
and disable the amplifier before exceeding safe transistor operating temperature limits.
(See warning table.) A fan speed-control system monitors heatsink temperature.
Room temperature amplifier bias is nominally 250 mA per FET, or approximately 1ampere total. Amplifier supply voltage is nominally 50-Vdc. Maximum allowable voltage
is 58 volts.
Harmonic suppression comes from push-pull operation of linear devices, followed by 5pole low-pass filters. This amplifier uses modern multi-layer high voltage chip capacitors
where applicable. Chip capacitors, due to low internal inductance and higher Q, offer
significantly improved harmonic suppression. Harmonic and spurious suppression is
excellent; external low-pass filters have minimal effect on TVI. The most likely cause of
any RFI or TVI will be fundamental overload from inadequate consumer device RFI
immunity.
Relay switching time is approximately ten milliseconds. Radio adjustable TX delay
should be set to 10 mS.
The T/R “Relay” control jack is well within the range of almost any transceiver or radio.
The “Relay” jack has an open circuit voltage of approximately 12 volts, and closed
circuit current less than 15 mA. Virtually any modern amateur radio will directly key this
amplifier.
This amplifier includes full metering using large easy-to-read conventional cross-needle
panel meters. The meters read all critical parameters, including Forward and Reflected
peak envelope RF power.
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Installation
Please look your amplifier and power supply over carefully. Observe the air inlet and
outlet ventilation holes. Facing the amplifier front panel, the cooling air inlets are on the
top left and lower right side, including the right hand side cabinet bottom. Warm air exits
vents at the cabinet rear.
While outlet air will not be particularly hot, it is never a good idea to have warm air blow
into heat sensitive equipment, such as transceivers or other power amplifiers. Have the
same consideration for your new amplifier and power supply. Be sure air inlet
temperature is not substantially above normal room temperature. Ideally, the air inlet
temperatures should be below 32° C or 90° F, although temperatures up to 41° C or
106° F are permissible. Should ambient temperatures exceed these limits, it might
become necessary to reduce duty cycle or power.
Warning: Do not block cooling air inlets and outlets!
Never expose the amplifier to excessive heat, dirt, water, or mist.
Installation Clearances
The amplifier must have a clear area to the bottom, both sides, and top for proper
airflow and to the rear for exhaust air and interconnection wiring. It is especially
important to avoid obstructions that block the air inlet on the top left, as well as both
lower sides. One to two inches clearance is normally adequate for full ventilation. Keep
any papers or loose objects that might impede airflow away from the air inlets and
outlets.
Locate the amplifier and power supply away from sensitive equipment such as
microphones, audio processing equipment, or low level audio or radio frequency
amplifiers. Generally, the best location for the power supply is below the operating desk
and away from antenna feedlines. This will minimize unwanted mechanical, acoustical,
and electrical coupling.
The power supply produces very little heat, but the air inlet and outlet must remain open
to normal room temperature air.
Installation Warnings
Accessory Equipment and Devices
Second to operator error, the most common amplifier failure or erratic fault protection
shutdown is from antenna switches, lightning protection devices, or baluns with lightning
spark gaps in high SWR coaxial lines. Do not use 50-ohm lightning protection devices
on lines with high SWR, such as between and antenna and antenna tuner. Be sure any
lighting protection devices are in working order.
Installation, Wiring, and Connections
The ALS-600SPS switching power supply is factory wired for 100-130 Vac. The linear
ALS-600PS is prewired for 120-125 Vac nominal voltage. Both use standard NEMA-5Version 0A
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15P 15-ampere 120-volt plugs. The round center pin is the safety ground. Do not
remove the safety ground.
CAUTION! Before connecting the power supply to an electrical outlet, always be sure
you have completed the following four steps:
1. Insert the 15-ampere 250V fuses into the two black fuse caps.
2. Insert the fuse and cap assemblies into the power supply’s fuse holders.
The fuses lock in place with a push and slight turn.
3. Connect the power supply to the amplifier.
4. Be sure the amplifier power switch is off.
Caution! Fuses have both voltage and current ratings. Use only 250V rated
fuses in this device. The voltage rating is generally marked on fuses. DO NOT use
automotive-type low voltage fuses in any power line application. See power
supply instructions.
Warning: Never insert the power supply cord into the outlet until you have
completed steps 1 through 4 above!
Position the amplifier at or near the desired location on your operating desk so you have
access to the rear panel, and connect the rear panel cables. Do not connect the
power mains at this time!
Station Ground
Common rumor is a station equipment ground reduces RFI (radio frequency
interference), reduces lightning damage, or improves signal levels. Generally, changes
in RFI or signal quality, with the addition or removal of a station ground, indicate an
antenna or feed line installation problem. Typical problems causing desktop RF
problems include the following:
ɀ Lack of suitable baluns.
ɀ Improper feed line routing near antennas, or improperly designed antennas.
ɀ Antennas too close to the operating position.
ɀ Poor equipment cabinet design, such as non-bonded or grounded equipment
covers or panels.
ɀ Poorly designed low-level audio line shield entrances, such as shields allowed to
enter cabinets instead of grounding at the enclosure entrance.
ɀ Improper antenna feed line building entrance, lacking a properly grounded
entrance panel.
ɀ Rather than patching a system problem at the desk, it is much better to correct
the actual problem source.
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Safety and Lighting Grounding
The power supply cabinet grounds through a safety ground pin on the power plug. This
system depends on a properly wired power outlet.
Lightning protection grounds do very little good at the operating desk. Lightning
protection grounds belong at the antenna cable entrance to the building. Station ground
rods must always electrically connect through low impedance and resistance
conductors to the power line entrance ground. The national electrical code in the USA
prohibits isolated ground systems at dwelling entrances. Isolated ground rods or
systems connected to conductors entering a dwelling increase damage likelihood during
storms, and increase fire hazard and shock risk.
RF grounds generally belong at the antenna or at the feed line entrance. With the
special exception of a small floating counterpoise grounds, RF grounds at or very near
the dwelling should bond into the mains ground outside the dwelling. This is especially
true with earth contact grounds.
There is a ground lug on the amplifier rear panel. This ground lug provides a convenient
chassis connection for operating positions with ground bus on the desk. A station
ground bus helps ensure desk area equipment cabinets are close to the same electrical
potential for radio frequencies and lower. Equipment ground lugs are NOT for
independent wires or connections to external ground rods or ground systems from each
piece of equipment. They are for connection to a desktop ground bus system common
to all equipment, if you prefer to use such a system.
Independent ground wire connections are counterproductive. Never use RF isolators
between the amplifier and radio. Never use long independent wires to external grounds.
Never connect desk equipment to ground rods that do not bond into the mains entrance
ground rod.
Coaxial Line Isolators
The goal of every operating position is to maintain all equipment cabinets and housings
at the same RF potential. Never install coaxial line isolators between desktop radio
equipment. Isolators on or near the desk are contrary to this goal, and actually promote
or encourage RF potential differences between different desk equipment. If an RF
problem appears at the operating position, correction, repair, or replacement of
defective equipment is in order.
Proper line-isolator installation points are either just outside the operating room entrance
and/or close to the problem’s actual source. If the antenna system has excessive
common mode current on feedlines, the desktop has defective cables or connectors, or
if equipment has poor equipment cabinet design such as poor cover bonding to chassis,
locate and correct the actual problem.
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Operating Frequency Range
This amplifier covers all Amateur Radio frequencies below 54 MHz, as restricted by
FCC or your local governing authority. Once you have established proper connections,
please set the amplifier BAND SELECT control (Fig. 2, ref 3) to one of the following
bands:
Band
Frequency
Range
Notes
160
1.8 - 2.1 MHz
80
3.2 - 4.2 MHz
40
6.0 - 7.5 MHz
30
7.5 - 14.5 MHz
20
7.5 – 14.5 MHz
17
14.5 – 22.0
MHz
15
14.5 – 22.0
MHz
12
22.0 – 30.0
MHz
Amplifier automatically disables above 25 MHz
10
22.0 – 30.0
MHz
Amplifier automatically disables below 28 MHz
6
50.0 – 54.0
MHz
USA 30-meter power limit currently 200-watts
Table 2 Band Frequency Ranges
Caution: This amplifier has an FCC mandated automatic disconnect and other features
preventing 27-MHz operation. There is no available circuitry or control provision to
circumvent this lockout.
MARS or CAP Operation
For licensed amateur radio operators participating in Military Affiliate Radio Systems or
CAP, this amplifier is suitable for use on all frequencies between 1.8 and 54 MHz with
some precautions. The upper frequency limits are in bold type in the table above. Do not
operate above the bold-type frequency limits in the table above or PA (power amplifier)
or filter damage may occur.
This amplifier has significantly cleaner output purity than FCC part 97.307 requirements
(January 2016) when operated inside all amateur bands listed in the table above.
Ameritron does not guarantee harmonic suppression or operation in applications outside
standard amateur radio bands.
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Most non-amateur services prohibit use of non-commercial radio equipment. This
amplifier automatically prevents operation between 25 and 28 MHz. Operation in the 2528 MHz range is not available with this product, irrespective of licensing or end-use.
Warning Lights
The ALS-606 has two primary warning lights in the center of the front panel, SWR and
PA. When SWR or PA warnings illuminate from an operating fault the amplifier defaults
to a forced bypass mode. Operational faults and the forced bypass reset by placing the
amplifier in standby.
ALC: The yellow ALC light is at the far left of the warning light cluster, next to the ALC
control. The yellow ALC light is not a fault indicator. The ALC light indicates ALC output.
Occasional flashing is normal with properly adjusted ALC. An almost steady ALC light
generally indicates too much ALC.
TX: The TX indicator illuminates steady green when the amplifier is “keyed” or in the
transmit mode.
The SWR and PA indicators serve exclusively as warnings. The SWR and PA, in
conjunction with TX and Band indicators, flash in certain “codes” to indicate severe
operational problems.
The following table applies to faults:
Warning
light Steady
Warning
light Flash
Fault
SWR
TX
Antenna
Power
SWR, PA
Band
Wrong filter
Cause or Cure
Reflected High
antenna
SWR
or
intermittent antenna or feed line
connection
Filter input SWR
PA, TX
10M,
TX
PA FET too hot
PA, Illegal 11 meter
REM, PA
Exciter
or
amplifier
on
incompatible band, filter failure
Excessive power for duty cycle
or SWR, lack of proper airflow
Excessive 27 MHz signal level
No data or bad band Defective or improper remote
data when on remote
cable, or bad radio band data
information
Table 3 LED Alarm Indicators
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Interconnection Wiring
Figure 2 Amplifier Interconnection
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Front Panel Controls
Figure 3 Front Panel
The front panel contains the following indicators and controls. To prevent damage,
become familiar with the front panel before operating the amplifier.
1. MULTIMETER Right scale FET Module Current, Voltage, ALC, and Reflected
Power. Left Scale Power Output. Multimeter (reflected power, module voltage,
ALC, or module current) selected by control 6.
2. BAND SELECT or REMote selector knob.
3. BAND INDICATOR or REMote backlit LED indicators, also warning if flashing.
4. ALC SET limit adjustment.
5. ALARM INDICATORS ALC, High SWR, PA Fault, and Transmit on.
6. MULTIMETER SELECTOR switch.
7. OPERATE/STANDBY switch, also resets fault warnings.
8. MAIN POWER switch, also resets power supply overload.
The meter’s left scale-arc (Figure 3, #1) continuously indicates forward peak envelope
power (PEP) output directly in kilowatts. It is 100 watts, or 0.1 kW, per meter scale
picket. PEP has no fixed relationship to long-term average power except, for constant
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amplitude carriers like a steady CW carrier, when PEP and average powers are equal.
PEP is the highest average power during one (or more) radio frequency cycle(s) at the
modulation envelope crest.
The meter’s rightmost scale-arc indicates PEP reflected power in watts on the upper
scale numbers and pickets. Notice power meter calibrations are not evenly spaced.
Lower scale numbers and pickets are evenly spaced, and are for all other functions. The
lower right scale is used for relative ALC setting, power amplifier module voltage (0-70
volts), and power amplifier current (0-70 amperes).
Nominal voltage is 50 volts;
maximum safe current is 25 amperes. Maximum safe output is 600 watts peak;
maximum safe peak reflected power is 125 watts.
Back Panel Connections
Figure 4 ALS-606 Back Panel
50V 25A POWER INPUT
The power supply must be unplugged from the power mains before installing or
removing this connector. This connector is indexed by a slight vertical offset in
the two round index pins. Observe spacing offsets to correctly mate the pins.
Seat the male plug fully onto the amplifier rear panel male connector pins. After
seating, the power supply can be plugged into the AC mains outlet.
ALC
Optional connection. Connects to radio ALC input and provides power limiting.
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RELAY
Connect to radio amplifier keying line. Radio must pull this 12-volt 15mA line
below 2 volts to transmit.
GND
Connect to station ground bus, if available. This connection is primarily for extra
safety.
RF IN
Connect through good 50-ohm coaxial cable of any reasonable length to radio’s
antenna output connector. This can be a smaller cable, such as RG-58/U, and
should not be needlessly long.
RF OUT
To 50-ohm antenna, antenna tuner, or power meter. This is the high power
output. 50-ohm coaxial cable and system beyond this connector must safely
handle at least 600-watts.
RADIO INTERFACE
This connector is for use with Ameritron radio interface cables. It allows
automatic band selection (following the radio). It also provides amplifier actuation
in transmit mode with some radios.
REMOTE
These RJ45 connectors are for an Ameritron remote control head, or remote
operation with an interface box. They provide access to controls, including most
metering functions.
KEY LOOP
Key loop switch and jack are for use with certain automatic antenna tuners.
Instructions will be in tuner manual. Key Loop switch must be off when using
remote cable unless using this jack.
ɀ If you use a desktop grounding bus system, connect the station ground bus to the
amplifier rear panel wing nut. National safety codes require the station ground
electrically bond to the power mains safety ground at the building entrance. Do
not connect the amplifier to its own isolated ground rod or ground system.
ɀ Connect the power supply to the amplifier.
ɀ Connect the RELAY line to the transceiver’s amplifier control port. This port is
usually described or defined in the amplifier interfacing section of the radio or
transceiver manual. This port must pull low for transmit, and be open circuit when
receiving. Nominal relay control voltage from the ALS-606 is 12 volts positive with
only 15 mA current. You should always check your transceiver’s manual, but
almost any standard transceiver directly interfaces with this amplifier.
ɀ Connect the RF OUT (output) port to the appropriate point in your station. This is
the high power RF output cable. This connection would go to your (minimum)
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600-watt rated Power/SWR meter, antenna, or antenna matching device. Good
quality Mini-8 or RG-8X cables are acceptable for anything but RTTY use,
although larger RG-8 style cables are normally preferred. The antenna matching
system, or antenna tuner, must connect to this port.
ɀ Connect the RF IN connector to your transceiver. Do not install any active
antenna matching devices on this port. In general, the shortest and most direct
cable connection is best, although high quality cables can be very long without
adverse effect on performance. RG-58/U or Mini-8 (RG-8X) style cables are
acceptable. You should never use a tuner of any type on the amplifier input, nor
should you drive this amplifier with over 100 watts peak envelope power. Never
use a non-FCC accepted device with this amplifier.
ɀ The ALC line is often not required, but ALC is a useful last resort safety measure.
The ALC system monitors the ALS-606 RF output power and reflected power,
and reduces exciter power if power exceeds front panel ALC control limits.
ɀ Operate the bandswitch manually during initial testing. Do not connect band
decoders, band data lines, or computer interfaces until initial tests are completed
and the amplifier is functioning normally.
Initial Operation
For personal and equipment safety, double-check all wiring and connections () before
turning power on. After verifying all power supply and amplifier connections, follow the
procedures below:
Place the MULTIMETER switch (Figure 3, #6) in the HV position. The multimeter is the
right-side scale on the panel meter (Figure 3, #1), and reads on the 0-70 right scale
bottom. Find 50 on the scale. HV reading should be approximately 50 volts whenever
the amplifier is ON. Any voltage above the Forward (KW) arc crossing is unsafe.
Place the ALC SET control (Figure 3, #4) full clockwise (10 on knob scale). This sets
ALC to engage at maximum possible power, which effectively will disable the ALC for
initial testing.
With the STANDBY/OPERATE switch (Figure 3, #7) on STANDBY, turn the power
switch (ref 8) ON.
There might be a slightly delayed “click” from the power supply. HV (Figure 3, #1)
should immediately rise to near full scale. The meter and the appropriate BAND LED
(Figure 3, #3) should illuminate.
The multimeter’s HV scale (fig.2, ref 1, lower right scale arc) should indicate
approximately 50 volts. Any voltage above the Forward (KW) arc crossing is unsafe.
Rotate the BAND switch (Figure 3, #2 and 3) through all positions. The appropriate
BAND LED will illuminate, band-filter relays will audibly switch when moving between
160 and 80 meters, 80 and 40 meters, 40 and 30 meters, 20 and 17meters, 15 and 12
meters, and between 10 and 6 meter selector positions. There should be no filter
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change moving between 30 and 20, 17 and 15, or 12 and 10-meter selections since
these band groups share a common filter in each pair.
Set the BAND switch (Figure 3, #2) to a band where you have a good 50-ohm highpower load connected.
Change the meter switch (Figure 3, #6) to REF. In this position, the multimeter indicates
PEP reflected power.
The next objective is to have a steady unmodulated low-power carrier. With no
modulation in the FM, AM, RTTY, or CW mode, and with the amplifier still on standby,
adjust the exciter’s power to about ten watts. Verify your radio is supplying reduced
power, ideally around 10-20 watts carrier (not critical), and that VSWR of the antenna
system or load is low. There should be almost no deflection on the reflected power
scale (Figure 3, #1) with the MULTIMETER switch in the REF position. If the meter
indicates noticeable reflected power, check the RF cables or antenna system.
Reminder: You cannot use a tuner in your radio or between your radio and this
amplifier to match the antenna system. Any antenna matching must be between
the amplifier and the antenna, and the antenna tuner and everything else
connected beyond the amplifier must conservatively handle 600 watts of both
carrier and peak envelope power.
ɀ Place the amplifier in OPERATE position (Figure 3, #7). Be sure the amplifier
BAND SELECT (Figure 3, #3) matches the band selected on the transceiver.
ɀ Place the transmitter or transceiver into transmit in FM, AM, RTTY, or CW
modes. The green TX LED (Figure 3, #5) should light. The Forward (KW) power
scale (Figure 3, #1) should increase to very roughly ten times the initial exciter
power reading. Reflected power should remain very low, and the PA current
should increase on the right meter 0-70 scale (Figure 3, #1) when in the Id
Multimeter position. Only the TX and BAND SELECT LED’s should illuminate.
ɀ Briefly, increase exciter power until the amplifier reaches 600-watts output, or
increase power until the exciter reaches maximum power without exceeding 600watts amplifier power. Watch the Id MULTIMETER position on the right meter 070 scale, and never exceed 30 amperes. Target Id reading is 25 amperes or
less.
ɀ After verifying all of this, and understanding control locations and function, the
amplifier is ready to operate.
ɀ This amplifier produces approximately 600-watts PEP output power with
approximately 70-watts PEP drive. This is nominal power, and can vary slightly
from band-to-band.
ALC Adjustment
It is unfortunate, but radio manufacturers do not have standardized interfaces. Because
of this, ALC requires some initial adjustment. If the ALC voltage is too low, the ALC will
not provide good control of power levels. If the ALC loop gain is too high, the ALC can
cause a “power bounce” as power attempts to settle at the desired ALC power
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threshold. This overshoot, dip, and recovery is caused by slow radio ALC response
time. Excessive ALC control loop gain aggravates power bounce.
ALC attack bounce shows on a steady carrier (such as RTTY, CW, or FM) as a high
initial peak power reading followed by a deep null. The deep null is followed by a slow
settling to the desired power level. On SSB, it will show as a slow warble or modulation
of power levels, especially at the very start of voice transmissions.
If ALC attack bounce is observed, the ALS-606 will require ALC gain adjustment. The
ALS-606 has a small flat-blade screwdriver adjustment for setting ALC gain. This
adjustment is accessible through a small hole located on the left cabinet side behind the
front panel, near the panel meter.
Power Supply Line Voltage Settings
ALS-600PS Voltage Settings
Before opening up the ALS-600PS make sure the supply is unplugged. On the ALS600PS there are several solder on jumpers to set the line voltage range. Change the
jumpers only if the line voltage is low. For most cases, unless you need to change over
to 220VAC there should not be a need to change the jumpers.
AC LINE
VOLTAGE
RANGE
95-110
105-120
115-130
200-220
210-230
220-240
BUCK BOOST
PRIMARY
A to B C to D
E to 2 F to 1
A to B C to D
E to F
A to B C to D
E to 1 F to 2
B to C
E to 2 F to 1
B to C
E to F
B to C
E to 1 F to 2
Table 4 ALS-600PS Voltage Settings
Figure 5 ALS-600PS Board
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ALS-600SPS Voltage Settings
When opening up the ALS-600SPS make sure it is unplugged and has been off for a
while to make sure the capacitors have been discharged. Some of the capacitors can
have a charge of 300-400VDC.
The ALS-600SPS will only need to be changed when switching between 120 and
240VAC. Move these jumpers only when changing voltages. Do not move any other
wires or bayonet connectors in the power supply.
Jumper 1
Jumper 2
Figure 6 ALS-600SPS Board Diagram
120V
240V
Jumper 1
A2 to A1
A2 to A3
Jumper 2
A5 to A4
A5 to A6
Table 5 ALS-600SPS Jumper Settings
ALS-606 Functional Overview
The ALS-606 is an amateur radio multiband radio frequency linear power amplifier with
600 watts PEP nominal output. This device complies with technical standards of FCC
rules, CFR Title 47 part 97.317(a) and (b).
General Operation
This linear amplifier covers the 160, 80, 40, 30, 20, 17, 15, 12, 10, and 6-meter amateur
bands. It typically requires 50-watts to 75-watts drive power. When power is off or when
the amplifier is not in transmitting mode, internal relays bypass the amplifier. When
power is ON and the standby switch is in the OPERATE position, and when the rear
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panel RELAY control line is held low (below 1 volt), exciter power is routed through input
relay RLY1 to the PD8m power attenuator board.
ATTENUATOR BOARD
The attenuator board has two 3dB attenuators. A relay switches one attenuator out on
six meters. This makes amplifier drive power requirements more consistent across the
operating frequency range.
PA Amplifier
Power amplification comes from a single 600-watt power amplifier module. The PA
module (PAM-606) uses four MFR-150 field effect transistors. Bias each MRF-150 at an
equal quiescent current within the range of 100 mA to 300 mA. It is important to bias
each FET the same. IMD performance changes very little within this bias range.
Transistor conduction angle is slightly over 180-degrees, providing linear class-AB
operation. Normal dc drain operating voltage is approximately 50 volts. The linear
supply is unregulated, and can run as high as 60 volts without harm, although it is much
better to keep voltage below 56 volts. See the power supply manual.
Unlike the standard Motorola based modules, the PAM-606 module uses two
diametrically opposed push-pull pairs. This shortens ground path distance while
simultaneously reducing circuit board ground plane current levels. This greatly improves
VHF performance. The dual diametrically opposed push-pull pairs drive balanced low
impedance striplines. The balanced striplines parallel at a unique 1:9 broadband
matching transformer.
The linear RF power FET’s mount on a forced-air-cooled aluminum heatsink. Two dc
fans cool the PAM-606 module and heatsink. Thermistor (PAM-606, R2) senses power
amplifier transistor flange temperature. Transistor temperature thermistor R2 regulates
bias voltage, reducing bias voltage as transistor temperature increases. This bias
feedback system keeps transistor quiescent current stable independent of transistor
junction temperatures. PAM-606 thermistor R2 also feeds a comparator. The
comparator removes drive when transistor temperatures approach unsafe levels.
A second thermistor (PAM-606 R1) monitors heatsink temperature. Voltage at
thermistor R1 regulates fan speed, increasing fan speed and airflow as the heat sink
warms.
PAM-606 module bias comes from the CB-2 control board assembly. Each transistor
has an individual bias adjustment, with minimum bias counter-clockwise from the top
view.
The PAM-606 module employs significant negative feedback to reduce gain, improve
gain flatness, improve linearity, and ensure stability. The FET’s have direct resistive
voltage feedback across each individual transistor from drain-to-gate, as well as pushpull transformer (T2) coupled feedback common to the push-pull circuit. Push-pull
operation, negative feedback, and linear biasing of FET’s provide significant pre-filter
harmonic suppression.
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1KWF6 Low Pass Filter Assembly
The PAM-606 module connects directly to the 1KWF6 circuit board assembly through a
50-ohm cable. Power enters the filter system through a directional coupler consisting of
current transformer T2, capacitors C36-38, C40-42, and resistors R4, 5 and 6. This
directional coupler detects termination errors at the filter’s power amplifier side. These
errors include filter band errors. A comparator on the CB2 control board monitors
directional coupler termination errors. Any significant filter or antenna reflected power
error disables the amplifier. Such errors normally come from selecting the wrong filter
for the exciter’s operating band, or having a poor load SWR on the amplifier.
The filter board directional coupler output routes through one of seven 5-pole low pass
filter groups. Relays, controlled by CB2 control board logic, select appropriate low pass
filter components.
Control and Protection Logic
The CB2 control board contains all protection and control logic. In the event of an
operational fault, the CB2 locks out the amplifier and illuminates the proper front panel
warning light sequence. The CB2 also contains bias, relay sequencing, and fan speed
controls.
The CB2 board contains band-decoding systems, and automatically disables operation
between 25 and 28 MHz in all ALS-606 amplifiers. The embedded 25-28 MHz lockout
function cannot be disabled or changed.
SWR Directional Coupler
The rear panel directional coupler board samples line current and line voltage, vector
summing line voltage and current samples before conversion to a dc output voltage.
The resulting forward and reflected voltage represents forward and reflected power. The
ratio of forward to reflected samples represent mismatch from ideal 50-ohm loads.
Circuit Boards
There are ten basic circuit boards plus one power amplifier modules in the ALS-606.
The text below gives a brief description of each board’s function.
1KWF6
The 1KWF6 is a 1kW rated low-pass filter. It is the very large topmost board with
several large toroids and air wound inductors. This board contains filter input SWR fault
detection and seven low-pass 5-pole filters. Additionally, antenna relay board RLY
attaches directly to the 1KWF6 board.
BSW3
The BSW3 is located behind the BAND switch. It provides all band selection functions,
as well as band indicators.
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CB2
The CB2 is located on the amplifier side between the band selector and power jack,
below the attenuator board. The CB2 control board provides most control functions,
including bias, fan speed, overload, wrong-band protection, and transmit-receive relay
sequencing. It is the hub for nearly all functions, including external interfaces, power
metering, and 12-volt busses.
MB2
The MB1 is located behind the front panel below the meter. It contains peak-envelopepower detection circuits, multi-meter switching, fault indicators, and ALC circuitry. There
are four power meter adjustments on this board; forward power, reflected power,
forward peak hold time, and reflected peak hold time. Shunts on a header, located on
the board’s upper edge, adjust panel meter brightness. This board also contains an ALC
gain adjustment, which limits ALC voltage.
PAM-606
The PA board, along with a large forced-air cooled heatsink, forms a PA module. FET’s
are gain matched at the factory, and replacement FET’s must be gain matched. This
board does not have adjustments; bias adjustments are located on the CB2. The power
amplifier module (located between the filter chassis and the cabinet bottom) is
accessible by removing the amplifier bottom cover only. The cabinet bottom cover must
remain in place to support the rest of the sheet metal.
PD8m
The PD8m is located on the right side of the amplifier just above the panel containing
the cooling fans. This board is slightly reconfigured from the PD8 used in the ALS1306
through removal of the matching transformer and combiner. The PD8m contains two
3dB attenuator pads. One attenuator switches out to increase six meter gain. Do not
modify, remove, or bypass the attenuators.
RJ45
The RJ45 board mounts on the rear panel. It contains two RJ-45 jacks for remote
control interface.
RLY
The RLY board contains independent transmit and receive relays, one for RF output
switching and the other for RF input switching. T/R relays activate with a low on
terminals K (key) J1-3 and RJ1-7. The CB2 board contains relay timing logic.
SWR
The SWR board is on the rear panel in front of the RF output connector. It is a traditional
50-ohm directional coupler. The null adjustment is accessible through a rear panel hole.
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Schematics
Filter 1KWF6
Figure 7 1KWFL6 Filter Board
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Bandswitch BSW3
Figure 8 Bandswitch BSW3
SWR Directional Coupler Board
Figure 9 SWR Power Sensor Board
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Control Board CB2
Figure 10 Control Board CB2 Part 1
Figure 11 Control Board CB2 Part 2
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Metering Board MB2
Figure 12 Meter Board MB2
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PA Module PAM-606
Figure 13 PA Module PAM-606
Power Attenuator PD8m
Figure 14 Attenuator PD8m
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Interface Connections RJ45
Figure RJ-45 Interface Board
Relay Board
RLA 081210
HD1
HD4
PA IN
RADIO
RL4
ANTENNA
PA OUT
RL1
MAY 21, 2008
Figure 15 TR Relay Board
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ALS-600PS Power Supply
Figure 16 ALS-600PS Power Supply
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Figure 17 ALS-600PS Board
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ALS-600SPS Switching Power Supply
VOLT
M1A
+
CURRENT
M1B
LAMP
+
+
BLK
B14
BLK
RED/WHT
+B9
RED
B15 +14V
ORG
BLUE
BLUE
B12 -14V
BLK
.01 uF
J1.4
J1.5
J1.6
J1.7
FAN
ORG
J1.2
J1.3
FROM
CABLE
.01 uF
BLK
WHT
RED
YEL
BRN
BRN
B11
GRN
RED
BLUE
J1.8
J1.11
GRN
.01uF
B13
RELAY 1
F2
WHT
WHT
WHT
B1 AC/N
.01uF
AC CORD
10 OHM
10 WATT
F1
BLK
GRN
.01uF
YELLOW
B2 AC/L
.01uF
Figure 18 ALS-600SPS Main Wiring
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2
3
D
4
R5
S
C
D
ZP2100R/5W 102/1KV
10D241
C5
102/250V~
A2+A1
=120V
A5+A6
A=
B=
G=
D=
W=
A6=2.36
B4=PC250
G8=2.2
D1
W8
C14
2907A
T1C
R44
47/5W D2
R62
D
C18
103/1KV
VO-
3mR
B4
R61
R14
B
51K
2907A
3mR
4
+14V/4A
VR1
1K
10R
R12
1K
C16
B3
R45
+
2W
2222A
Q8
1U/16V
R11
G
Q4
C15
+
B
C12
T2B
IRFP460
+
DEF30JP
Q6
10R
R10
1K
G8
W2
C
R9
G
IRFP460
G6
C17
103/1KV
104/50V
C
+
C11
T2C
Q3
T300-26
DEF30JP
C13
102/1KV
R13
51K
EEL22
C9
D
G4
D1
VO+
T1B
EE
FG
FG
W4
D1
22T
R4
S
B9
T3A
50V/20A
L2
13T
B
C
R3 C7
A3
A4,5
A2+A3
=230V
A5+A4
SSCD14
Q5
2222A
Q7
B
V-
A2 G2
AC /L
AC/L
+
T2A
10R
R8
1K
4.7K/5W
A6
C10
10U/16V
R7
G
Q2
IRFP460
1000U/80V
V-
G7
1000U/80V
AC
SB358
W6
B2
V+
W1
G5
ZP1
10D241
4.7U/250V
C8 T1A
D
2
2
C3
102/250V~
V+
AC
+
S
1
C6
6
MAX=31A
at 10 Min
VCC
D15
10R
R6
1K
1000U/80V
100K/0.5W
3
W3
BR1
2200U/200V
C2
C1
474/300V~
R2
4
W5
C4
102/250V~
334/300V~
1M/0.5W
D
R1
S
G3
A1
G1
B1 30A/250V~
2200U/200V
35T
L1
F1
AC /N
100K/0.5W
AC/N
5
Q1
G
IRFP460
EE
1
+14 V/4 A
C.C
D3
1N4007
ALS600B
B5
GND
ALS600A-1
IN
GND
B6 B7
3
OUT
C
VCC
4
A-2
B8
D14
+
220V
C21
V-
C27
B6S
R25
20K
C36
C30
10U/16V
102/50V
102
+
R24
9.53K
100K
11
D6
D7
14
1
R41
10K
1U/16V
A
11
6
33K
2
4
11
1N4148
U2A
LM224
2
U2D
LM224
8
100V
8
9
8
1
B
2
C34
104
Q9
4
B
U3A
LM2903N
U3B
6
R54
10K
MMBT2222A
7
9
CD4148
CD4148
C31
22U/16V
2
1
R35
7
O.L.P
7
+
66
T3
ZP2
BR2
L2
C34
R62
F1
R32
28.7K O.L.P
5
470R
RED
D5
D9
10
E2
4.7K
LM2903N
R53
10K
D10
VR3
5K
R37
R39
10K
3
90~95=OFF
R52
33K
10
U2C
LM224
R36
39K
13
1N4148
C37
104
O.V.P
3
12
3
R31
E1
1K RED
141
12
+
5
28.7K
R38 1
4
13
2
R50
10K
4148
4.36V
1
2
2.54*2P 2.54*2P
D8
R49
100K
5
1.36V
R29
R30 10K
VO ADJ VR2
FAN1
1
2
R46
1.5K
NTC1
R51 10K
30K
R26
R19
28.7K
R40
10K
C29
R27
10K
3.13V
R48
47K
60~65
C28 103
R56
10K
I.P.P
C26
102
U1
KA7500C
2.49K
4
3
R42
22R1210
V+
22R1210
R43
BR2
AC
4
2
1
C25
103
R28
4.7K
AC
FAN1
R47
20K
C33
104
680K
2
12
R18
3.9K
222
R21
1
R55
33R/2W
C32
10U/16V
VF 5V
C24
T3B
13
14
16
C23
103
R20
220K
15
R16 10U/16V
100K
6.19K
B
10R1210
R17
619R
R22
C22
W8
5
68K R23
+
3
2200U/200V
22U/6.3V
+
4
120V
A6
R15
+
AC/L
A5
104/50V
C20
104/50V
C19
SSCD14
2
2200U/200V
C
1
SB358
2 A2
A3
A4
3
-1 4 V/1 A
3
E
V-
D4 -14V/1A
1N4007
9
V+
AC
10
1 A1
120V
W7
AC
8
2
7
1
3
AC/N
C
ALS600
1
U2B
LM224
5
R34
10K
R33
6.19K
D13
CD4148
2
VR3
E2
U3
D13
Q13
NTC1
A
FN2
P1
1N4148
2008-08/11
ALS600D
Titl e
Siz e
Nu mbe r
C
Dat e:
File :
1
2
3
4
2 7-Oct -2 00 8
E:\
(
)\
AC / DC
ALS600
\
5
Rev i sio n
Shee t o f
\ALS6 00 \ALS6 00 .DDB
Dra wn B y:
2
6
Figure 19 ALS-600SPS AC/DC Section
2
3
Q1
R5
G
S
Q10
R6
1K
B
E
D
G7
10R
C
IRFP460
D
4
D
VCC
R57
470R
C10
10U/16V
+
C
D
1
Q5
2222A
B
R7 8
T3A
R58
470R
2222A
C11
3
104/50V
G
B
E
D
B
R59
470R
5
R11
R14
B
51K
2907A
10R
Q13
B
E
R12
1K
2222A
Q8
B
T2B
C
S
IRFP460
1U/16V
2222A
G
Q4
EE
Q12
B
C12
10R
C
S
G8
R10
1K
C
2907A
Q6
2
6
C
D
T2C
Q3
R9
R13
51K
C
EEL22
CD4148
IRFP460
2222A
Q7
B
7
D11
D1
EE
Q11
B
T2A
10R
C
R8
1K
E
C
Q2
IRFP460
C
S
G
2222A
R60
470R
D12
2008-08/11
CD4148
A
Title
Size
A4
Date:
File:
1
2
3
27-Oct-2008
E:\
( )\
A
DRIVER
ALS600
Number
\
Revision
2
Sheet of
\ALS600\ALS600.DDB
Drawn By:
4
Figure 20 ALS-600SPS Board Driver Section
Version 0A
41
1
2
3
N
4
C1
104/300V
3
R14
680K
F1
C2
1
C3
+
4.7U/400V
6
+
8*12
RLG
L
D
N.L=17.5V
4.7U/400V
C4
R2
750K
1208
VO
R3
220K
1210
D2
3,4
5
T1A
R5
+
C7
470U/25V
T1B
6
1,2
C
GND
BYD57ZK
P4
1
PL1A
PC817
+
R7
2.2K
D
7
R10
4.7R
U1
LD7535B
C9
Q1
G
U2
2SK2645
R
A
1
GND
2
3
4
GATE
FB
VDD
RI
SENSE
6
B
104/50V
K
S
T1C
R8
20k
2
C5
22U/50V
8
R12
10K
+
C8
220U/25V
4.7R
1206
BYD57ZD
P3
DR6*8
ES3D
D1
C
0.5A
L2
D3
R1
750K
1207
1A/250V~
103/1KV
R13
680K
AC 90 ~ 264V
P2
B
5
470UH
EC36
B6S
BR1
2
P1
D
4
L1
R9
3.32k
UTC431
R11
47K
5
4
R4
PL1B
PC817
C6
104/50V
3
R6
2R
1210
100K
2008-06/09
A
A
C10
Title
102/250V~
Size
AC/DC
ALS600A
Number
B
Date:
File:
1
2
3
4
27-Oct-2008
E:\
( )\
Revision
1
Sheet of
\ALS600\ALS600.DDB
Drawn By:
\
5
6
Figure 21 ALS-600SPS Board AC/DC Section 2
2
3
D0
N
SB16
DC 50V
BR1
4
C1
104/300V
P2
R14
680K
F1
C2
1
B6S
C3
+
R1
220K
1207
1A/250V~
C4
R2
100K
1208
R3
220K
1210
D2
L2
SB3100
DR6*8
T1B
C7
470U/25V
+
P3
C8
220U/25V
+
R12
10K
6
1,2
C
GND
BYD57ZD
P4
1
4.7R
1206
C5
22U/50V
PL1A
PC817
+
R8
22K
2
BYD57ZD
1A
3,4
5
T1A
R5
470P
D3
VO
D1
C
D
14V
47U/63V
8*12
RLG
J1
L
+
C11
47U/63V
3
D
R13
680K
6
5
10UH
T37-26
2
P1
4
L1
103/1KV
1
R7
2.2K
2
7
R10
4.7R
U1
LD7535B
8
C9
Q1
1
U2
K
3
T1C
B
IRF630
R
A
1
2
3
4
GND
GATE
FB
VDD
RI
SENSE
6
R11
47K
B
104/50V
R9
4.7K
UTC431
5
4
R4
PL1B
PC817
3
C6
104/50V
R6
0.6R
1210
100K
A
2008-06/09
A
C10
Title
102/1KV
Size
DC/DC
ALS600C
Number
B
Date:
File:
1
2
3
4
5
27-Oct-2008
E:\
( )\
\
Revision
1
Sheet of
\ALS600\ALS600.DDB
Drawn By:
6
Figure 22 ALS-600SPS Board DC/DC Section
Version 0A
42
NOTES:
Version 0A
43
116 Willow Road
Starkville, MS 39762
ALS-606 Limited Warranty
Ameritron warrants to the original purchaser that this product shall be free from defects in material
(except tubes and RF output transistors) or workmanship for one year from the date of original purchase.
During the warranty period, Ameritron or an authorized Ameritron service facility will provide free of
charge both parts (except tubes and RF output transistors) and labor necessary to correct defects in
material or workmanship.
To obtain such warranty service, the original purchaser must:
(1)
(2)
(3)
Complete and send in the Warranty Registration Card.
Notify Ameritron or its nearest authorized service facility, as soon as possible after discovery of a
possible defect, of:
(a) The model number and serial number, if any:
(b) The identity of the seller and the approximate date of purchase;
(c) A detailed description of the problem, including details on the equipment.
Deliver the product to the Ameritron or the nearest authorized service facility, or ship the same in
its original container or equivalent, fully insured and shipping charges prepaid.
Correct maintenance, repair and use are important to obtain proper performance from this product.
Therefore, carefully read the Instruction Manual. This warranty does not apply to any defect that
Ameritron determines is due to:
(1)
(2)
(3)
Improper maintenance or repair, including the installation of parts or accessories that do not
conform to the quality and specifications of the original parts.
Misuse, abuse, neglect or improper installation.
Accidental or intentional damage.
All implied warranties, if any, terminate one (1) year from the date of the original purchase.
The foregoing constitutes Ameritron's entire obligation with respect to this product, and the original
purchaser and any user or owner shall have no remedy and no claim for incidental or consequential
damages. Some states do not allow limitations on how long an implied warranty lasts or do not allow the
exclusion or limitation of incidental or consequential damage, so the above limitation and exclusion may
not apply to you.
This warranty gives specific legal rights and you may also have other rights which vary from state to
state.
PLEASE RECORD THIS INFORMATION:
Model _______________ Serial No. __________________
Date of Purchase __________________________________
Purchased From __________________________________
Warranty Card Mailed On __________________________
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