Palstar Incorporated
9676 N. Looney Rd.,
Piqua, OH 45356 USA
Customer Service and Sales Telephone:
1-800-773-7931
Fax:
1-937-773-8003
Email:
info@palstar.com
AT1500DT 1500 Watt Antenna Tuner
Owner’s Manual
© Copyright 2006 Palstar Inc.
Printed in the U.S.A.
Version 1.3
01.09.2009
2
Service and Warranty
Important Safeguards
An appliance and cart combination should
be moved with care. Quick stops, excessive force and uneven surfaces may cause
the appliance and cart combination to
overturn.
WARNING: TO PREVENT FIRE OR
ELECTRICAL SHOCK DO NOT
EXPOSE TO RAIN OR MOISTURE
The lightning flash with arrow head
symbol, within an equilateral triangle, is
intended to alert the user to the presence
of uninsulated “dangerous voltage” within
the product’s enclosure that may be of
sufficient magnitude to constitute a risk of
electric shock to persons.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO NOT
OPEN THE CABINET WHILE OPERATING. REFER SERVICING TO
QUALIFIED PERSONNEL ONLY.
CAUTION: TO PREVENT ELECTRIC SHOCK, DO NOT USE THE THREE WIRE
CORD WITH AN EXTENSION CORD RECEPTIACLE OR OTHER
OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO
PREVENT BLADE EXPOSURE.
1. Read Instructions—All the safety and
operating instructions should be read before
the appliance is operated.
2. Retain Instructions—The safety and
operating instructions should be retained for
future reference.
3. Heed Warnings—All warnings on the
appliance should be adhered to.
4. Follow Instructions—All operating and
use instructions should be followed.
5. Cleaning—Unplug this appliance from the
wall outlet before cleaning. Do not use liquid
cleaners or aerosol cleaners. Use a damp
cloth for cleaning.
6. Do Not Use Attachments—not recommended by the manufacturer or they may
cause hazards.
7. Water and Moisture—Do not use this
product near water—for example, near a
bathtub, wash bowl, kitchen sink, laundry tub,
in a wet basement, or near a swimming pool—
and the like.
8. Accessories—Do not place this product on
an unstable cart, stand, tripod, bracket, or
table. The product may fall, causing serious
injury to a child or adult, and serious damage
to the appliance.
9. Ventilation—This product should never be
placed near or over a radiator or heat register.
This product should not be placed in a built-in
installation such as a bookcase or rack unless
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proper ventilation is provided or the manufacturer’s instructions have been adhered to. Any
slots or openings in the cabinet are provided
for ventilation. To ensure reliable operation of
the video product and to protect it from overheating, these openings must not be blocked
or covered. The openings should never be
blocked by placing the product on a bed, sofa,
rug, or other similar surface.
10. Grounding or Polarization—this product
is equipped with a 3-wire line cord receptacle.
It is intended for use with a 3-wire properly
grounded power socket. Do not defeat the
safety purpose of the supplied line cord and
plug.
11. Power Sources—This product should be
operated only from the type of power source
indicated on the marketing label. If you are not
sure of the type of power supplied to your
home, consult your appliance dealer or local
power company.
12. Power-cord Protection—Power-supply
cords should be routed so they are not likely
to be walked on or pinched by items placed
upon or against them. Pay particular attention
to cords at plugs, convenience receptacles,
and the point where they exit.
13. Lightning—For added protection for this
product during a lightning storm, or when it is
left unattended and unused for long periods of
time, unplug it from the wall outlet.
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15
Limited Warranty
Palstar Inc. warrants products manufactured by it to be free from
defects in material and workmanship under normal use and service for
a period of one (1) year from the date of delivery to the first
buyer (the “Warranty Period”). Palstar Inc’s obligation under this warranty is limited to repair or replacement of the product; at its option at
the Palstar factory in Piqua, OH.
Effective only when the product is returned to the factory with all
transportation charges prepaid and examination of the product discloses
in Palstar’s judgment, to have been defective during the Warranty Period.
The Warranty Period shall not extend beyond its original term with
respect to interim in-warranty repairs by Palstar. This Warranty Period
shall not apply to any product which has been repaired or altered by
anyone other than Palstar without prior written authorization. Warranty does not extend to any products which have been subject to damage from improper installation, application or maintenance in accordance with the operating specification. Palstar neither assumes nor authorizes any person to assume for it any obligation or liability other than
herein stated.
Repair Policy
When sending in a product for service, please “double” box it carefully and ship it insured for your protection. Please include a note clearly
describing the problem, how you wish the item returned and how you
wish to pay for the service. Package your unit properly. Palstar, Inc. is
not responsible for merchandise damaged in shipment. Our service rate
is $30 per hour (1/2 hr. minimum).
Return Policy
All returns must receive prior authorization from Palstar. Returned
items must be received in original—AS SHIPPED– condition including
the original box, manuals, accessories, and copy of sales receipt. Returns
must be within 14 days of purchase. Returned items are subject to a
25% restocking fee. Shipping is not refundable.
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14
Operating Your AT11500DT cont’d
Notes
1. An SWR of 1:1 is best, but an SWR as high as 2:1 may be acceptable. Check
your transmitter/amplifier manual for details.
2. If you cannot get an acceptable SWR, lengthen or shorten your antenna and/
or feedlines and retune.
3. Once every 4-6 months clean the roller coil with 70% isopropyl alcohol and a
clean cotton cloth. Do not transfer any of the conducting grease on the rod
that guides the roller wheel as this will contaminate the windings on the
roller coil body.
4. Any time a new or different antenna is connected, it is necessary to repeat
the tuning procedure for each antenna.
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Important Safeguards cont’d
14. Power Lines—An outside antenna system should not be located in the vicinity of
overhead power lines, other electric light or
power circuits, where it can fall into such
power lines or circuits. When installing an
outside antenna system, extreme care should
be taken to keep from touching such power
lines or circuits as contact with them may be
fatal.
15. Overloading—Do not overload wall outlets and extension cords as this can result in a
risk of fire or electric shock.
16. Object and Liquid Entry—Never push
objects of any kind into this product through
openings as they may touch dangerous voltage points or short-out parts that could result
in a fire or electric shock. Never spill liquid of
any kind on the product.
17. Servicing—Do not attempt to service this
product yourself as opening or removing
covers may expose you to dangerous voltage
or other hazards. Refer all servicing to qualified service personnel.
18. Damage Requiring Service—Unplug this
product from the wall outlet and refer servicing
to qualified service personnel under the following conditions:
a. When the power-supply cord or plug is
damaged.
b. If liquid has been spilled, or objects have
fallen into the product.
c. If the product has been exposed to rain or
water.
d. If the product does not operate normally by
following the operating instructions. Adjust
only those controls that are covered by the
operating instructions. An improper adjustment may result in damage and will often
require extensive work by a qualified
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3
technician to restore the product to its normal
operation.
e. If the product has been dropped or the
cabinet has been damaged.
f. When the product exhibits a distinct change
in performance—this indicates a need for
service.
19. Replacement Parts—when replacement
parts are required, be sure the service technician has used replacement parts specified by
the manufacturer or have the same characteristics as the original parts. Unauthorized substitutes may result in fire, electric shock or
other hazards.
20. Safety Checks—Upon completion of any
service or repairs to this product, ask the
service technician to perform safety checks to
determine that the product is in proper operating condition.
21. Outdoor Antenna Grounding—Before
attempting to install this product, be sure the
antenna or cable system is grounded so as to
provide some protection against voltage
surges and built-up static charges.
a. Use No.10 AWG copper, No.8AWG aluminum, No.17AWB copper-clad steel or bronze
wire or larger, as ground wire.
b. Secure antenna lead-in and ground wires to
house with stand-off insulators spaced from 4
feet to 6 feet apart.
c. Mount antenna discharge unit as close as
possible to where lead-in enters house.
d. A driven rod may be used as the grounding
electrode where other types of electrode
systems do not exist. Refer to the National
Electric Code, ANSI/NFPA 70-1990 for information.
e. Use jumper wire not smaller than No.6
AWG copper or equivalent, when a separate
antenna grounding electrode is used.
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4
Table of Contents
Thank you for purchasing a
Palstar AT1500DT Antenna
Tuner. This antenna tuner has
been designed and manufactured to high quality standards,
and will provide reliable operation for many years.
Important safeguards
2
Table of Contents
4
General Description
5
Specifications
6
Installation
7
Unpacking
Location
Installation Procedures
AT1500DT Schematic
Rear Panel Connections
Front Panel Description
Operating Your AT11500DT cont’d
Please carefully read the
Owner’s Manual in order to take
advantage of the many interesting features that will provide
years of enjoyable amateur
radio operation.
Service and Warranty
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5. Set RANGE switch to 300 W (button out).
6. Set the DIRECT/TUNED mode switch to BYPASS or the position matching your antenna connection. To tune your antenna,
the switch selection must be set to: COAX 1 TUNED, COAX
2 TUNED or WIRE (BALANCED ANTENNA). Selecting
COAX 1 DIRECT, COAX 2 DIRECT or BYPASS bypasses the
tuning selection.
7. Rotate the TUNE and INDUCTOR controls for maximum
noise or signal as heard on your receiver. Refer to preset tuning chart below.
8. Key your transmitter and adjust the power level for a reading
of 100-150 watts on the FORWARD scale. Adjust the TUNE
and INDUCTOR controls for a minimum REFLECTED reading
while maintaining a FORWARD reading of 50-100 watts using
your transmitter power control.
9. Read the SWR on the red scale at the point where the two
needles intersect. Repeat tuning the TUNE and INDUCTOR
controls until the lowest SWR reading is obtained.
7
7
7
8
10
This procedure takes patience the first time. The
TUNE control varies the capacitor and provide
fine adjustments. The roller inductor crank control provides coarse adjustment.
11
10. When you have tuned your antenna to the best SWR, record
the settings of the INPUT, ANTENNA and INDUCTANCE
controls on the chart above for future reference. When you
retune, use these settings as your starting point.
Operating Your AT1500DT 12
Before Operating
Tuning
Notes
13
12
12
14
15
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Operating Your AT1500DT
General Description
5
WARNING: DO NOT OPERATE THE AT1500DT
WITH THE COVER OFF.
Before Operating
1. To avoid possible damage to the AT1500DT set TUNE, INDUCTOR, and POWER RANGE switches as outlined in the
chart before applying transmitter power.
2. Begin tuning with your transmitter/amp into the tuner set at a
low output power setting (50-100 Watts).
Tuning
1. Select the band and frequency of desired operation.
2. Set TUNE and INDUCTOR controls to the suggested setting
before applying transmitter power (see chart). Actual settings
will vary from antenna to antenna.
3. Set your transmitter/amp to a low power output. If your transmitter has a TUNE position, select that position.
4. If you use a linear amplifier, set it to Standby. Do not use the
linear amplifier until the AT1KM is tuned. Do not exceed
1200 watts average (single tone).
TUNE
BAND
SUGGESTED
INDUCTOR
ACTUAL
SUGGESTED
160 M
47
73
80 M
47
256
60 M
46
293
40 M
47
321
20 M
46
351
17 M
47
356
15 M
44
357
12 M
42
357
10 M
47
360
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ACTUAL
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The Palstar AT1500DT Antenna
Tuner is an American made impedance matching network that
can provide unbalanced and
balanced output.
The AT1500DT also features a
precision roller inductor with a
steatite ceramic core. The innovative differential capacitor design simplifies operation by reducing the number of knobs and
The AT1500DT optimizes the
eliminates false peaks while
performance of your antenna
tuning. It also results in a more
and transmitter or SWL receiver compact case that takes up less
by providing adjustable imped- room on the operation desk.
ance matching using a T-type
circuit configuration with a dual- Designed to handle both Balstator differential variable caanced line feeds and Coax
pacitor.
feeds the AT1500DT features a
front panel mounted switch to
The AT1500DT also measures select between feeds.
the power and Voltage Standing
Wave Ratio (VSWR or SWR)
Tuning is achieved with the front
which allows you to tune the
panel mounted controls. The
SWR to the lowest ratio possible Vernier dial allows for tuning
for the selected transmission
with precision and accuracy,
frequency.
while the Inductor crank handle
facilitates coarse adjustments.
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6
Specifications
Front Panel Description
1
2
3
4
11
5
Front Panel Indicators and Controls
Metering
PEAK and PEAK HOLD Dual movement cross
needle power and frequency compensated coupler
Controls
Input Tuning
Inductance
Antenna Selector Switch
Power Range Switch
Dual-stator differential capacitor (385 - 0 - 385) pF,
5 kV) with 6:1 precision vernier drive
26 µH roller inductor; 12 ga. Wire wound on steatite
ceramic core, silver plated bar/wheel 6 position:
Coax 1 tuned and tuner bypass, coax 2 tuned and
tuner bypass, bypass and balanced antenna
6 position: Coax 1 tuned and tuner bypass
Coax 2 tuned and tuner bypass
Bypass and balanced antenna
Switch wafers are ceramic (3kV rated)
2 position 300 W /3000 W
Rear Panel Connectors
Coax 1
Coax 2
Bypass
RF INPUT
Balanced Line
End –Fed Wire
12 VDC Input
SO239 connector
SO239 connector
SO239 connector
SO239 connector
Dual High Voltage Nylon66TM terminal post
Dual High Voltage Nylon66TM terminal post
Adaptor for meter light 2.1 mm con. (center positive)
Other
Frequency Coverage
Power Maximum
Impedance Range
Balanced Output
Dimensions
Weight
Materials
1.8 — 30 MHz
1500 W PEP SSB, 1200 W single tone continuous
20 to 1500 Ω 160 m to 10 m (assuming resistive
load) Reduce power for lower Z range
4:1 Ruthroff voltage type balun
4.5”H x 12.6”W x 12”D (incl. terminals)
12 lbs.
Chassis and top cover is 11 ga. (.090) aluminum
that has been chem.-film treated in gold color. Front
Panel powder-coated and epoxy screened.
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5
1. POWER/SWR METER Dual
needle meter displays FORWARD and
REFLECTED power in watts. SWR is measured where the two needles intersect on
the red scale.
2. PEAK HOLD Select to read Peak Hold
on the SWR meter.
3. PEAK Select PEAK to read AVG PEAK.
4. RANGE Two-position switch selects the
range of FORWARD and REFLECTED
power displayed on the power meter.
When the RANGE button is out, the FORWARD meter scale reads 300 watts full
scale and the REFLECTED meter scale
reads 60 watts full scale. When the RANGE
button is in the FORWARD meter scale
reads 3000 watts full scale and the REFLECTED meter scale reads 600 watts full
scale.
5. POWER Select to turn on metering
with backlight.
4. INDUCTOR 26 µH continuously variable ceramic roller inductor driven by a
crank handle. Coupled to the crank handle
is a gear-driven precision mechanical
counter.
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4
5. TUNE Continuously adjustable differential capacitor.
6.DIRECT-TUNED MODE SWITCH
Six-position rotary switch selects an output
coaxial connector with direct mode which
bypasses the tuner and tuned position
which passes antenna through the tuner
components.
a. DIRECT BYPASS selects BYPASS COAX connector bypassing the impedance matching circuit
but providing SWR, FORWARD and REFLECTED
meter readings.
b. DIRECT COAX 1 selects COAX 1 connector
bypassing the tuner matching circuit but providing
SWR, FORWARD and REFLECTED meter readings.
c. DIRECT COAX 2 selects COAX 2 connector
bypassing the tuner matching circuit but providing
SWR, FORWARD and REFLECTED meter readings.
d. TUNED COAX 1 selects COAX 1 connector
through the impedance matching T circuit.
e. TUNED COAX 2 selects COAX 2 connector
through the tuner matching T circuit.
f. BALANCED OUT selects the balanced and End
Fed Wire output connectors located after the
impedance matching circuit.
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10
Installation cont’d.
Installation
7
COAX 2 connectors on the rear
Carefully remove the AT1500DT panel. These connectors are
either direct from the transmitter
from the shipping carton and
inspect it for signs of damage. If or through the tuned circuit deany damage is apparent, notify pending on the setting of the
DIRECT/TUNED mode switch
the transportation carrier or
dealer immediately. We recom- on the front panel.
mend keeping the packing
carton for moving, storing or For a balanced feed antenna
reshipping the tuner to us for connect a balanced feed line the
repair if required.
upper and lower BALANCED
OUTPUT posts, and the supLocation
plied jumper strap between the
Select a location for the
lower BALANCED OUTPUT and
AT1500DT that allows the con- the END FED WIRE posts (see
nectors to be free form any pos- pg 10).
sible contact during operation to
allow for unrestricted air flow for
Unpacking
BALANCED OUTPUT two
nylon High Voltage post
connectors for output to RF
balanced wire fed antennas.
Jumper wire must be connected between lower post
on END FED WIRE post.
COAX 1 coaxial
connector for output
to Antenna One.
COAX 2 coaxial
connector for output
to Antenna Two.
RF INPUT coaxial
connector for
input from transmitter or amplifier.
WARNING: Balanced antennas will produce high
RF voltages at the output post connectors. RF
burns may result if touched during transmission.
If using a single wire antenna,
connect it to the END FED
Installation Procedures
WIRE post and remove the
Connect a coax cable from your jumper strap. When using an
transmitter to the RF INPUT
END FED WIRE antenna the
connector on the rear panel.
GROUND post must be conKeep the cable as short as pos- nected to a good RF ground.
sible. If you use a linear amplifier, connect your transmitter to Connect a dummy load to the
the linear amplifier input and the BYPASS connector using a
linear amplifier output to the
coax cable. This lets you select
AT1500DT. Do not use more
the dummy load from the
than 1200 watts average
DIRECT/TUNED mode switch.
(single tone) through the
Any antenna that does not retuner.
quire the use of an antenna
tuner may be connected to the
Connect coax cable(s) from
BYPASS connector, if desired.
your antenna to COAX 1 or
cooling of your AT1500DT.
GROUND post/
wing nut ground
END FED WIRE post connector
for output to a single-wire antenna
(do not use jumper). Ground post
must be connected to good RF
ground.
BYPASS coaxial connector for output to dummy
load or third coax output. Bypasses tuner, but
meter circuits are on if
12VDC power is supplied
12 VDC INPUT
(2.1 mm plug) for
12VDC @ 200mA
to power the metering circuit and
lamp.
FIGURE 1 REAR PANEL CONNECTORS
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8
AT11500DT Schematic
AT1500DT Schematic
MODEL AT1500DT DIFF-T TUNER
385-0-385 pf DIFF-T
variable capacitor
PEAK
PEAK/HOLD
(Front Panel)
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