Sommerkamp_TS-288A_user

Sommerkamp_TS-288A_user
SOMMERKAMP
SSB TRANSCEIVER
TS 288A w/z2a-ch.cB
INSTRUCTION MANUAL
CONTENTS
Page
[. General description ..........e.0srverereereereerecrear erre. 1
П. Specifications ..........rrreervereeeeceereererererr erre. 1
IIL. Installatión ........eosroesssorearerercerececrrerearecrreeraTe, 7
1. General oo. ieee eae 1 00000 7
2. Home station .....eo.resorerrscocoreéerrmareoccerarerecas 7
3. Mobile installation .....oroooecosesconoreraoo coda ecc, 7
4. AntenDa 25451 me E EE RA AR A RAR EMOS 3
IV. Operation ....eoereresrerverecererrerererorotrarercecrare es 3
1. Controls and Switches ......0.0.0.000000000000 000 ansaanalsizad 4
2. Rear panel layout «voi HEHE nea 6
V. Tuning procedures ........rero.revevarorerererert correr. 7
1, ImitialeheekK edsauätroseaqueesuue see e ua» 000520 mme, 7
2. Receiver operation ........... DEUST EEE E 45 à 4 48 4 5 4 Sara 7
3. Basic tune-up for transmission ........00000 000 ae aa sea se een es 8
4. SSBoperation 444040000000 ua ee ae a eee ea aa eee nee eee 0
5, CW operation .....0.0000000000 KK EHRE нннонн 9
6. AM operation .....eeeerecoororadedrererrr ere cr erre 9
VI. Principles of operation ......oeeresereererereerereeree rre. g
1. Main signal flow 22220000 0 eee eee ess es eee eee see eee q
2. Meter fUACtION = + + + # + + + à à à à 4 4 4 4 4 6000 a era ee ES 10
VII. Alignment CE HE Ee EERE ER EEN kee mme ie (EE a ae aa © EE 10
ОЦЕНИ SXGEGEREESRANEERANEAN ENANA NN
2. Equipment required ......e_.rreerrevoroecreererrereereA. 11
3. $S-meter sensitivity adjustment ......._.re-eeeevorecerereere». 11
4 Noise blanker threshold ::=::::50 EE COCER REA REA
5. VOX adjustment ........_._eeeerrereesvrereecrerecrerrere.. 12
6. CW sidetone level adjustment .......oee.eonoreorecvecrrece. 12
7. Carrier balafıce 0:65): EAN CATAÉA e DAA 12
8. ALC level adjustment ......000000000 0000 вона нннноонооо о 12
9, Voltage regulator adjustment ........00000000 0000ER 12
10. Clarifier adjustment ........0000000000 00ER ea es eee eee 00 0 12
11. Biasadjustment ...….….…10weaeee een nes a ua es 00001 ne 000000
12. Final amplifier neutralization .........ereersveorrrrorerer 13
13. Alignment of transmitter mixer /driver and receiver front
end stages .....ocoseeveonocoaroereoreorectereeren rene. 14
14. Heterodyne crystal oscillator alignment ........r_eeeeerreeerooo 15
15. Trapcoil alignment ........eeorreocrverserereerrererere e. 15
16. Synthesized CB channel heterodyne crystal oscillator alignment.. 16
17. How to make use of optional, fixed channel ...... e e ome De OY
VII. Diagrams .......ecesorecoreerocareoarererarecarerecerteereere. 18
1. Block diagram ........eeeerreesoororeree reason. 18
2. PCB diagrams .......eereeesórrocorerevrierrrenere reee. 18
3. Schematic diagram ......oereorererosercererereseorerece.. 23
TS 288A SSB TRANSCEIVER
I. GENERAL DESCRIPTION
The model TS 288A SSB Transceiver is a precision built, compact, high performance transceiver of advanced design
providing SSB (USB, LSB selectable), CW and AM modes of operation. The TS 288A operates at an input of 260 watts
SSB, 180 watts CW and 80 watts AM on all bands, 80 to 10 meter, and on 11 meter CB band. An auxiliary band is
provided for the use of other frequency than amateur bands.
All circuits, except transmitter linear amplifier, are transistorized and composed of standard computer type built-
in modules, permit easy maintenance.
The TS 288A is self-contained, requiring only a microphone and an antenna for operation at home, portable or
mobile, and operates from either 100/110/117/200/220/234 volts AC or 12 volts DC (negative ground) power
source; the two-way solid state power supply is an integral part of the unit. Selection between two power sources is
automatically made when the proper line cord is connected.
A separate power switch is provided to turn off tube heaters when ih receive, and the TS 288A draws only 0.5 amp.,
less than your auto dash lights.
All accessories, such as built-in VOX, break-in CW with sidetone, 25 and 100 Khz calibrators, noise blanker and 10 Mhz
WWV are built in. In addition, dual VFO adaptor, crystal control adaptor, speaker and clarifier is an integral part of the
unit. Provision is made for the installation of 600 Hz crystal filter for expert CW operation. CW filter will be selected
automatically when the transceiver mode switch is placed in the CW position.
The entire transceiver package is 34.0 cm wide, 15.3 cm high, 28.5 cm deep and weights approximately 15 kg. Construc-
tion of heavy gauge steel provides an extremely rugged package, virtually immune to the effect of vibration and shock.
II. SPECIFICATIONS
Frequency Range 1.8 — 30 MHz amateur bands
27.0 — 27.5 MHz
23 fixed CB channels
(26.965 — 27.255 KHz)
10.0 — 10.5 KHz
(160m band crystal optional)
Type of Emission SSB & AM.
Power Input SSB 260 Watts PEP
CW 180 Watts, 50% duty cycle
AM 80 Watts
(slightly lower on 10 meter)
Carrier Suppression — 40 db or more
Sideb and Suppression — 40 db or more at 1000 Hz
Spurious Radiation — 40 db or more
Transmitter Frequency Response 300 Hz - 2700 Hz + 6 db
Intermodulation distortion — 30 db or more
Antenna Output Impedance 50 — 75 ohm unbalanced
Frequency Stability 100 Hz, 30 minutes after warm up
Sensitivity SSB & CW: 0.5 uV S/N 10 db or more
AM: 2 uV, S/N 10 db or more
(at 30 % modulation)
Microphone Impedance 50K ohm
Selectivity SSB &-AM: 2.4 KH at 6 db
4.4KH at 60 db
CW (option): 600 Hz at 6 db
1.2 KH at 60 db
Image Rejection — 50 db or more
Aduio Output 3 Watts 4 ohm at 10% distortion
Power Consumption AC Receive 35 Watts
Transmit 300 Watts Max.
DC 12V Standby 0.5 Amp.
Transmit 21 Amp.
Active Component Complement 38 Tr's, 7 Fet's, 3 IC's, 3 Tubes 8
76 diodes.
Dimensions 34.0 cm (W) 15.3 cm (H) 28.5 cm (D)
Weight Approx 15 Kg
HI. INSTALLATION
1. General:
The TS 288A Transceiver is designed to provide a complete single-unit installation for fixed, portable, or mobile
operation. It is recommended to avoid excessively warm location, such as car heater outlet, however, no special
precaution be observed in the choice of location, provided adequate ventilation space is available. A minimum of
two inches of air space above the cabinet top and on all sides is recommended to allow proper air flow around the
cabinet. Never stack other units above or below the cabinet since the accumulated heat from both units could cause
permanent damage.
2. Home Station:
Plugging the AC power cord into the receptacle at the rear of the transceiver connects all power circuits for AC
operation. Prior to connecting AC cord to power outlet, be sure the voltage marked on the rear of the transceiver
should be same as your line voltage. The different line voltage will cause permanent damage to the transceiver. The
transceiver has been designed for 100/110/117/200/220/234 volts, 50/60 cps AC operation, and wired for one of
these voltage at factory. If the line voltage is different from your transceiver voltage, the rewiring of the transformer is
necessary prior to connecting AC code to power line.
The transceiver should be connected to a good water pipe ground. It is not recommended to use gas or electrical
conduit pipes. The grounding lead should be kept as short as possible.
The ground may be connected to the terminal marked GND.
3. Mobile Installation:
The TS 288A Transceiver will operate satisfactorily from any 12 volts negative-ground battery source by connecting
the DC power cord to the rear panel receptacle. For under-dash mounting, a special mounting bracket is available
from your dealer. The transceiver can be used in boat as well as car.
The transceiver requires an average of 14 amps at transmit and 25 amps on voice peaks. The fuse in the DC power
cable should be 20 amps. When making connections to the car battery, be certain that the RED lead is connected to
the positive (+) terminal and the BLACK lead to the negative (—) terminal of the battery; reversed connections could
permanently damage the transceiver. The BLACK lead should run directly to the negative terminal of the battery,
Using the car frame as a negative connection or connecting the positive lead at a point such as the ignition switch
— 2 —
4.
places the devices creating the noise in the same current path as the transceiver and fails to take advantage of the
filtering action of the battery. The power cable should be kept away from ignition wires and be as short as possible to
minimize voltage drop and to provide a low impedance path from the transceiver to the battery which acts as filter,
Prior to operating the transceiver in a mobile or marine installation, the automobile voltage regulator setting should
be checked. In many vehicles, the voltage regulation is very poor and in many cases, the regulator is adjusted for an
excessively high charging voltage. As the battery and regulator age, the maximum voltage while charging can increase
to a very surprising level which is injurious to the battery and also this high voltage could cause heavy damage to the
transceiver,
The transceiver will operate from a source voltage of 11 volts to 14 volts. It is necessary to carefully set the charging
system so that the limit of 14 volts is not exceeded.
Under no circumstances, should the transceiver ever be operated from a vehicle electrical system that cannot regulate
the voltage well below 15 volts.
The same precaution should be taken for not only the transceiver but also any other radio equipment used in a
vehicle.
CAUTION
Lethal voltages are present in several areas of the transceiver whenever the set is on. Do not attempt to work inside
the set with power applied.
Never transmit without having proper antenna or dummy load connected to the transceiver.
Antenna:
The transceiver is designed for use with resonant antenna having the impedance of 50 — 100 ohm resistive.
The antenna is usually the most critical part of a station installation. Results both in receiving and transmitting will
depend on how well an antenna is installed and adjusted. Any of the common antenna systems designed for use on the
high frequency amateur bands may be used with the transceiver, provided the input impedance of the antenna system
is within the capability of the transceiver pi-matching network (50 — 100 ohms).
If a tuned-open wire transmission line or a long wire antenna is used, a suitable antenna tuner must be used between the
antenna and the transceiver to provide an impedance match between the unbalanced coaxial output of the transceiver
and the balanced open-wire feeder or a long wire.
For mobile operation, most of the commonly used mobile antennas in the market will give good results with the trans-
ceiver. Make certain that the outer braid of coaxial cable is securely grounded to the chassis of the vehicle at the
antenna mount. The length of such a mobile antenna will effect highly on SWR of the transmission output. It is
recommended to adjust the antenna length carefully for minimum SWR after installation.
IV. OPERATION
The TS 288A Transceiver has been specifically designed to provide the ease of operation and versatility. All controls
“have been thoroughly tested before shipment from the factory. Several of the controls are unusual in operation,
however, improper adjustment may result in signals of poor quality in both transmit and receive. The various front
panel controls and their functions are described in the following section, Be certain that you understand thoroughly
the function of each control before operating the transceiver.
(11) 12) (19) (13) 14) (15) (1) (16) (9) (10)
PRESEL
М -
(18) (17) (2) (3) (4) (7). (5) (8) (6)
FIG. A
1. CONTROLS & SWITCHES : See Fig. A.
(1)
(3)
(4)
(5)
(6)
VFO Select Switch:
This switch sets the transceiver to receive or transmit on either internal VFO or external VFO.
INT — Internal VFO for both receive and transmit.
RX EXT — External VFO for receive and internal VFO for transmit.
TX EXT — External VFO for transmit and internal VFO for receive.
EXT — External VFO for both receive and transmit.
CB CH — for 23 fixed CB channel operation.
CH1 — for an optional, additional fixed frequency operation
(See Page 17 for detailed explanation)
Mode Switch: (LSB-USB-TUNE-CW-AM)
The mode switch is a five-position switch. This switch is used to select the mode of operation; LSB, USB, AM, CW
or TUNE position, At AM, CW and TUNE position, a separate crystal is used to shift carrier frequency into the filter
passband.
RF GAIN/AF GAIN:
The RF GAIN and AF GAIN controls are two controls mounted on concentric shafts. RF GAIN control (outside knob)
varies the gain of the receiver RF and IF amplifier. Maximum sensitivity is obtained with the control set at 10
(fully clockwise).
The AF GAIN control (inside knob) adjusts the audio output level at the speaker and phone jack. Clockwise
rotation increases the audio output.
Tuning knob:
The large knob directly below the dial window controls the actual frequency of operation after the desired band has
been selected. A precise double gear and a ball driver mechanism are incorporated to provide a slow tuning rate and,
at the same time, to read out 1 KHz on 100 KHz dial. Since the tuning rate is 14 Khz per revolution, there is no
critical tuning on SSB signal. As an additional feature, the 100 KHz skirt vernier dial may be adjusted for the
calibration.
BAND Switch:
The band switch is an eleven-position switch used to sclect the desired band for receiving or transmitting. The band
indication is made in black or red to read on the dial for direct frequency determination.
CLARIFIER:
The clarifier control provides a means for tuning the receiver frequency +5 Khz to either side of the transmitting
frequency. Thus, it is possible to set the pitch of the voice you are receiving to the most readable point without
affecting your transmitting frequency. Its use is particularly valuable in “net” operation where several participants
may be transmitting slightly off frequency. The clarifier control may be switched off and the receiver locked to
the transmitting frequency by setting the clarifier control to the OFF position. Normally, you will want to keep the
clarifier turned off until the initial contact is made. After the contact is made, the clarifier control may be used to
zero-in tor any drift at the other end of contact.
— 4 —
(8)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
The clarifier is so designed to be on, when operating in the fixed CB channels, regardless of the position of clarifier
control, and the tuning range is + 0.5 KHz, Therefore, it is recommendable to set the clarifier control at the zero
position until the initial contact is made when operating in the fixed CB channels.
PRESELECT:
This pretunes signal circuits for both transmit and receive condition, New slug tuned mechanism is used to cover
all bands even outside of amateur bands except IF and VFO frequencies.
MIC GAIN/CARRIER:
The MIC GAIN/CARRIER control is two controls mounted on concentric shafts. The carrier control (the outside
control) varies the amount of the carrier in the CW, AM and TUNE modes of operation.
The MIC GAIN control (the inside knob) varies the audio level from the microphone amplifier stage. The control
has sufficient range to permit adjustment of any high level crystal microphone or low level dynamic microphone
normally used for voice communications, The accessory microphone is of dynamic type, and the impedance is 50 K
ohms. Both controls have maximum value with the control set at 10 (fully clockwise).
PLATE:
This tunes the plate circuit of PA tubes.
LOADING:
This tunes the output circuit of pi-network to match output impedance to antenna or feeder impedance.
POWER SWITCH:
This tunes the transceiver on for both AC and DC operation.
HEATER SWITCH:
With this switch in the lower position, the transmitter tube heaters and the high-voltage supply are turned off when
the transceiver is in receive only. This reduces battery drain to 0.5 amps and thus permits long period of listening
without fear of excessive battery drain. Pushing the rocker switch to the upper position actuates the high-voltage
supply and the tube heaters. After 30 seconds of warm-up for the transmitter is ready for operation. This switch
operates for both DC and AC.
MOX/PTT/VOX:
In the MOX position (upper position), the transceiver is set to the constant transmit condition.
In the PTT position (mid position), the receiver portion of the transceiver is in operation, and the transmitter is
operated by a Push-To-Talk switch on the microphone. In the VOX position (lower position), the transmitter is
energized by voice or part of the first character of CW transmission and in the absence of voice or keying the
transceiver is automatically placed in the receive mode.
RF ATT (RF ATTENUATOR)/N.B. (NOISE BLANKER)
In the upper position a 20 db attenuator is inserted in the incoming signal path. This may be used to minimize
cross modulation.
In the lower position the noise blanker is actuated and shuts off ignition noise pulse.
25 KHz/100KHz (CALIBRATOR):
The 100 KHz crystal oscillator is used to calibrate the receiver, In the 25 KHz position, 25 KHz multivibrator generates
a maker signal at every 25 KHz point,
CB CHANNEL SEITCH
This switch operates only when the VFO Select Switch (1) is set at the CB CH position. The 23-Position switch
provides 23 CB channels ranging from 26.965MHz to 27.255 MHz, as in the frequency table in Page 16.
PHONE:
This is a PHONE Jack for headphone. The internal speaker will be disabled with the headphone plugged in.
MIC:
The Microphone Jack. Three-pole plug is used for microphone input, push-to-talk and ground.
METER SWITCH:
Select the meter to read PA cathode current, relative power output, or ALC level.
2. REAR PANEL LAYOUT : See Fig. В
(18) (7) (17)
fomi
O sOMMERMAME О
- FB CEBA 24h i
oo. BS BE [TRANSCEIVER |
22 SMA us II Te
du HEA
о Ë CUBANOS. néatie dde
; dub URE | Hd
TELEX Temo: a AAA
(8) (9) (10) (11) 12) (13) (14) (15) (16)
FIG. B (REAR VIEW)
(1) AF-IN:
Audio input from the other optional equipment, such as FM detector unit.
(2) IF OUT:
3,180 KHz IF signal may be taken from the jack for use by panoramic adaptor.
(3) SP:
Audio output jack for an external speaker. The output impedance is 4 ohms, and the internal speaker will be disabled
with a plug inserted.
(4) PTT:
Push-to-talk jack. The transceiver may be controlled with the external circuit. When this terminal is grounded, the
transceiver activates into transmitting condition.
(5) PATCH:
Speech input terminal for phone patch connection. Impedance is 50 kilo ohms.
(6) AUX:
This jack is connected to receiver output (4 ohms) to be used for phone patch.
(7) FAN:
| 4-P socket for connection of cooling fan.
(8) RF OUT:
Output from driver stage may be obtained for use of a transverter.
(9) GND:
For ground connection.
(10) PO ADJ:
For adjustment of the meter functioning as RF meter.
(11) ANT:
Coaxial connector for antenna.
(12) ACC:
Accessory socket: Accessory plug (pin 1 and 2 connected) should be plugged in for normal transceiver operation.
For use with a transverter, see schematic diagram for proper connection of the plug.
(13) KEY:
Key jack for code operation.
(14)
(15)
(16)
(17)
(18)
EXT VFO:
Input jack for external VFO.
FUSE:
Fuse holder: 3 amps for 115 volts, 2 amps for 220 volts operation.
POWER:
Power receptacle. AC and DC cords with plugs are supplied. DC cords are provided with fuse holder for a 20A fuse,
DC-DC convertor transistors
Ventilation guard grill:
Remove the grill for mounting a cooling fan.
у
V. TUNING PROCEDURES
The tuning procedure of the TS 288A Transceiver is not complicated, however, care should be exercised when tuning
to ensure peak performance of the equipment. The following paragraphs describe the procedure for receiver and
transmitter tuning.
1. INITIAL CHECK:
To ensure proper operation and to prevent damage to the equipment, the following initial check by the owner is
recommended, although the unit has been thoroughly pre-tested before shipment from factory.
Before connecting to an AC power output or 12 volts DC source, carefully examine the unit for any visible damage;
check that all printed modules and crystals are firmly in place and that all controls and switches are operating normally.
Ensure that voltage specifications marked on rear apron match the supply voltage.
2. RECEIVING OPERATION:
Preset the controls and switches as follows:
VFO Selector . ..... INT (internal)
MOX/PTT/VOX ....PTT
POWER .......... ON (upper position)
RF GAIN vitssues Maximum
AF GAIN "¿usura As required
BAND aus ore: Desired band
MODE ua za: Desired mode
TUNING ........ 100 KHZ point nearest desired frequency
PRESELECTOR . ... Desired band segment
CLARIFIER ...... OFF
BRE ATT ей в: OFF
CALIBRATOR ....100 KHz
To calibrate, set the TUNING control to the 100 KHz point on the dial nearest the desired frequency. Tune the
receiver to the 100 KHz calibrator signal for zero beat. Two calibrator signals may be heard near the 100 KHz point.
One of them is a signal through IF stage. Zero beat against the stranger signal. To calibrate, hold tuning knob
firmly at zero beat point and rotate skirt vernier dial to zero position. The skirt vernier dial surrounds the tuning
knob and is held in position by a friction locking device. This dial is easily movable by hand but will retain its
position after calibration. The transceiver must be calibrated when changing mode of operation to LSB, USB,
AM or CW,
With calibration switch at 25 KHz position, calibrator signal can be heard at every 25 KHz point. The calibration
switch should be in the OFF position in normal use of the receiver.
— 7 —
3.
4.
BASIC TUNE-UP FOR TRANSMISSION:
Connect dummy load to the coaxial antenna output, and preset the controls as follows:
POWER. swiss os OFF
HEATER лосс OFE
MODE. <a de... TUNE
CARRIER ....... . 0 (fully counter-clockwise)
BAND .......... Desired band
TUNING ........ Desired frequency
PRESELECTOR ... . Desired band segment
PLATE .......... Desired band segment
LOADING ........ 0 (9 o’clock position)
METER .......... IC
VFO SELECT ....INT
MOX/PTT/VOX ....PTT
With the power and heater switches turned on, allow 60 seconds for warm-up of the transmitter tube. Be certain
that accessory plug is in the accessory socket. The heater voltage to the final tubes is supplied through pin 1 and
pin 2 of the accessory plug.
Set the MOX/PTT/VOX switch to MOX position. Meter will now read Final Amplifier resting cathode current. This
should be set at 60 mA with the BIAS control located under the top cover. (See Fig. C) Switch the meter to ALC
position and adjust ALC control under the top cover for full scale deflection of the meter. Return meter switch to
IC position.
rey
J
CAUTION
Te He -
The importance of short “ON” cycles and limiting IC current to the lowest level consistent with positive tuning
indications in the following sequence cannot be overemphasized. An indicated current of 100 mA is usually sufficient
to provide positive indication of drive maximums and final plate dips. Excessive “OFF-Resonance” currents for
extended periods of time will result in destruction of the final amplifier tubes.
Advance CARRIER. control until the cathod current starts to increase. Peak the PRESELECTOR for maximum IC
reading. Adjust CARRIER control until meter reading indicates 100 mA, and quickly tune PLATE for dip. Advance
LOADING in small increments and re-dip with the PLATE control until the dip is broad and IC current becomes
about 80% of maximum non-resonance current, i.e. 80 mA.
Momentarily advance CARRIER control until the meter shows approximately 400 mA. Momentarily advance the
CARRIER control for maximum output (ten seconds maximum), and re-adjust PLATE and LOADING for IC dip
at maximum output, At dip the cathode current will be approximately 300 mA. (slightly lower on 10 meter band).
Return MOX/PTT/VOX switch to PTT or VOX position.
Sonn Wh Sy, Swat Sono MrT Rey Sep Se a al Nei a
6 CAUTION |
A A A Re Mei
EXCEEDING THE TIME LIMITS NOTED FOR MAXIMUM POWER INPUT DURING FINAL TUNING MAY
RESULT IN DESTRUCTION OF THE FINAL OUTPUT TUBES.
NOTE:
Insertion of key plug automatically disconnects bias supply to PA tubes, therefore, with key plug installed idling
current will not be indicated on meter,
SSB OPERATION
After completion of tuning, set MODE switch to LSB or USB. Set the METER switch to ALC position. Set the
MOX/PTT/VOX switch to MOX position and advance the MIC GAIN control until the meter kicks up to mid scale
of green colored portion when speaking into the microphone normally.
For VOX operation, set the MOX/PTT/VOX switch to VOX position. and adjust VOX GAIN potentiometer under
the top cover until voice actuates the transceiver. Set the ANTITRIP potentiometer to the minimum point to
prevent the speaker output from tripping, Do not turn VOX eain or ANTITRIP gain controls more than necessary,
Adjust the DELAY potentiometer under the top cover for suitable release time.
—8 —
NOTE:
When meter is set to IC, voice modulation peaks will indicate 150 — 200 mA. Actual peak current, however, is
approximately 2 times the indicated value.
5. CW OPERATION
After the Basic Tune-up for Transmission procedure, set the MODE switch to CW position. The IC reading on meter
will be zero when the key is not depressed, and the meter reading should not exceed 350 mA when the key is depressed.
6. AM OPERATION
The basic tune-up procedure is same as for CW OPERATION, and set the MODE switch to AM position after the
tune-up procedure. Adjust the CARRIER control to limit the IC reading on meter to 150 mA max.
VI. PRINCIPLES OF OPERATION
The block diagram and the circuit description provide you with a better understanding of this transceiver.
The transceiver consists of a double conversion receiver and a double conversion exciter-transmitter., .Receiver and
transmitter circuits use common oscillator, crystal filter and IF stages. The low frequency IF is 3.180 KHz. The high
frequency IF is passband tuned to cover 5520 KHz to 6020 KHz.
All circuits, except driver and final amplifier stages, are assembled in the computor type printed board modules.
1. MAIN SIGNAL FLOW
In receive, the HF signal from the antenna is routed through the antenna relay to the RF amplifier stage.
Front end selectivity is provided by slug tuned circuits at the input and output of the RF stage. The signal is then
coverted from the HF frequency to the IF frequency of 5520 — 6020 KHz in mixer satge. The IF frequency is the
mixer product resulting from injection from heterodyne oscillator stage of a signal 6020 KHz higher in frequency than
lower end frequency of the band. The high frequency IF signal from receiver 1st mixer is applied to the high IF pass-
band network. Output from this network is applied to receiver 2nd mixer Q2. When the signal is applied to 2nd
mixer, the VFO injection signal from VFO unit produces the 3180 KHz difference product. Output from the
2nd mixer is fed to the crystal filter through noise blanker. Output from the crystal filter is coupled to integrated
circuit IF amplifier chain and then fed to the AM detector, the product detector and the AGC and S meter circuit.
The output of a crystal controlled BFO is also fed to the product detector. The front panel MODE switch then
selects AM or product detector as desired by the operator. The signal is finally processed through the audio ampli-
fier and into the built-in speaker or an external speaker.
In transmit, audio developed in the microphone amplifier circuit is applied to the balanced modulator stage along with
injection from the carrier oscillator stage. A diode-ring modulator, when balanced properly, provides modulated
output with sidebands above and below the carrier frequency; the carrier is suppressed. The desired sideband
is selected by a crystal filter of which passband is centered at 3,180 KHz. This passes either the upper or lower
sideband, depending upon the sideband selected when the MODE switch is set to sideband carrier crystal of 3178.5 KHz
or 3181.5 KHz.
For AM and CW, a separate crystal of 3179.3 KHz is used. The AM signal is generated by a separate AM modulator
which works as buffer stage for CW. The output from crystal filter or AM modulator/CW buffer is coupled to
transmitter first mixer together with the output of the VFO oscillator. The sum of two signals produce the higher
frequency IF signal of 5520 to 6020 KHz. This IF signal is fed to the transmitter second mixer through bandpass
network which is so designed that it provides excellent spurious reduction. With the signal from the heterodyne
oscillator, the mixer converts the high frequency IF signal to the desired transmitting frequency.
Output from the transmitter second mixer is amplified by the driver tube to a level sufficient to drive the final linear
amplifier tubes.
Final output from amplifier tubes is fed to a pi-network consisting of coil and PLATE and LOADING capacitors.
A section of band switch adjusts the inductance of coil to the correct value for each band, and adds fixed amount of
capacity to the PLATE and LOADING capacitors on the lower bands. Output from the pinetwork is fed to the
antenna through the contacts of the antenna relay.
The ALC circuit is placed in the grid circuit of the final tubes. When RF driving voltage to the final tubes becomes
sufficient to drive the grid positive, the grid begins to draw current and the signal is detected. This produces an aduio
envelop and then rectified to DC voltage which controls gain of younder stages to prevent distortion caused by
overdrive.
A part of the output from the microphone amplifier is coupled to the VOX amplifier. Amplifier signal is then
rectified and applied to the relay control transistor which activates the transceiver.
— 9 —
2. METER FUNCTION
The meter circuit is designed to measure signal strength in receive and cathode current, relative Power Output, and
the level of automatic level control in transmit. Switching of the meter is automatically made by means of relay
contacts for transmit and receive. -
The Multipurpose Meter in the transceiver has a three position selector switch which provides for metering the system
in transmit.
When the transceiver is in the transmit mode, the ALC switch position connects the meter to the source of ALC
controlled IF amplifier, MK-10, on PCB No. PO4-006.
The meter then measures current of MK-10 which decreases when the ALC controlled voltage is applied to its gate.
This control voltage is developed when the final amplifier stage is driven into the grid current levels during SSB
operation.
In the IC switch position, the meter is connected to the cathodes of final tubes in parallel with shunt resistor, and
measures total cathode current of the tubes. This current includes screen grid current of the tubes which is negligible
against plate current.
The meter is connected in the cathode circuit to avoid an operational chock hazard which is often experienced when
the meter is placed in the high potential point such as plate circuit.
The meter scale carries a 0 — 0.5 amp calibration to monitor the cathode current of the final tubes.
In switch position PO, the relative power output is measured by reading the rectified DC current at the pi output
circuit,
When the transceiver is in the receive mode, the AGC voltage developed on signal is fed to the meter amplifiers,
Q4 and Q5, on PCB P04-004A to provide a long scale deflection for metering antenna signal strength. The
meter is calibrated in the customary “S$” units up to S-9 and in db over S-9, representing approximayely 100
microvolts at the antenna terminals for S-9.
CAUTION |
fe ai
A semi-fixed resistor, VR-9, is switched in parallel with the meter as a shunt resistor for measuring the plate current
of the final tubes (See Fig. C). This resistor is factory-adjusted and should not be tampered with.
VII. ALIGNMENT
BR
WARNING
DANGEROUS VOLTAGES ARE PRESENT, THEREFORE EXTREME CARE IS ESSENTIAL. BE SURE THAT
ALL POWER IS DISCONNECTED BEFORE WORKING ON THE CHASSIS. CHECK THE HIGH VOLTAGES IN
THE CAPACITORS BY SHORTING THE HIGH VOLTAGE LINE TO GROUND WITH AN INSULATED SCREW
DRIVER.
CAUTION
Never operate the transceiver as a transmitter without a matched antenna or adequate dummy load termination.
The power amplifier tubes and Pi-network components can be damaged if the transceiver is operated as a transmitter
unloaded.
1. GENERAL
The transceiver has been carefully aligned and tested at the factory and, with normal usage, should not require other
than the usual attention given to electronic equipment. Service or replacement of a major component may require
subsequent realignment, but under no circumstance should realignment be attempted unless the operation of the
transceiver is fully understood, and as the malfunction has been analized and definitely traced to misalignment.
Service work should only be performed by persons experienced in this work, using the proper test equipment,
2. EQUIPMENT REQUIRED
(1) RF signal Generator; Hewlett-Packard Model 606A, or equivalent having up to one volt output at an impedance of
50 to 75 ohms and a frequency coverage to 30 MHz.
(2) A Vacuum Tube Voltmeter (VTVM); Hewlett-Packard Model 410B, or equivalent with an RF probe usable up to
40 MHz.
(3) A dummy Load; Bird Model 43 or equivalent 50 ohms non-reactive rated for 300 watts average power.
(4) AF Signal Generator; Hewlett-Packard Model 200 AB, or equivalent.
(5) A general coverage receiver covering the frequency range from 3 to 30 MHz with a 100 KHz calibrator.
(6) Frequency counter (up to 35.520 Mhz)
Tz
(6)
(2
(4)
(3)
(1)
HETERODYNE
CRYSTAL OSCILLATOR
CHECK POINT
УК
(5)
FIG. C (TOP VIEW)
3. S-METER SENSITIVITY ADJUSTMENT : See Fig. C -(1)
The S-meter will require a sensitivity adjustment if it does not indicate signal strength properly. Place the transceiver
in the receive mode and connect the signal generator to pin 15 of MJ-3. Set the signal generator at 3180 KHz, 30%
modulated and adjust the generator signal level for 78 db. The S-meter should read S-9. If not, adjust S-meter control
VR4 on PCB No. P04-004A for an S-meter reading at just S-9.
4. NOISE BLANKER THRESHOLD: See Fig. C-(2)
The operating level of the noise blanker is determined by the THRESHOLD control VR1 on P04-004A. Counter-
clockwise rotation of the control increases the effectiveness of the blanker, however extreme setting of this control
reduces a receiver sensitivity. Receive a proper signal of S-6 or 8 S-meter reading.
Adjust the control for one S-unit decrease with the Noise Blanker switch on.
Extremely strong signals may cause distortion on the derived signal due to mixing at the switching diode. This effect
can be reduced by decreasing the threshold control or by switching the Noise Blanker to OFF.
5. VOX ADJUSTMENT : See Fig. C-(3)
VOX controls are located on P04-005A; VR1, VOX Gain; VR2, Delay; and VR4, Antitrip Gain.
Set MIC GAIN to center of travel. Speak into the microphone normally, adjust VOX control VR1 to just activate
VOX relay.
Receive a proper signal and adjust the AF GAIN control to a comfortable listening level. Set the ANTITRIP
control VR4 to the minimum point to prevent the speaker output from tripping the VOX.
Adjust the DELAY control VR2 for suitable release time.
6. CW SIDETONE LEVEL ADJUSTMENT : See Fig. C - (4)
CW sidetone level may be adjusted by rotating TONE-level potentiometer (VR3) located on P04-005A.
7. CARRIER BALANCE : See Fig. C- (5)
The transceiver should be allowed to reach operating temperature before making the carrier balance adjustment,
Tune up the transceiver for SSB operation using an antenna or dummy load for transmitter. Turn the MIC GAIN
control fully counterclockwise to remove all audio from the modulator stage.
With the MODE switch set at either of the LSB/USB positions, turn MOX/PTT/VOX switch to MOX position and
adjust the carrier balance controls (VR1 and TC1) on PCB No. P04-006A for minimum PO meter reading.
A more exacting balance may be obtained by connecting the VTVM RF probe across the transceiver antenna terminal
and observing the RF voltage on the one volt RMS scale or by tuning a receiver, having an S-meter, to the transmitted
frequency. In either case, adjust the balance controls for minimum meter reading while switching the MODE switch
back and forth between the two sideband positions to obtain good carrier suppression for both sidebands.
8. ALC LEVEL ADJUSTMENT : See Fig. C - (6)
The ALC meter will require a zero adjustment when METER switch on the front panel is set to ALC position where
the meter will indicate limiting action. To adjust meter to zero (full scale for this case), set controls as follows;
MODE USB
MIC GAIN Fully counterclockwise
OPERATION MOX
If meter reads other than zero (full scale), adjust ALC control VR2 on PCB No.P04-006A for zero indication.
Return OPERATION switch to PTT or VOX position.
9. VOLTAGE REGULATOR ADJUSTMENT : See Fig. C - (7)
Connect VTVM DC probe between pin 13 of MJ-6 (for PCB No. P04-007A) and ground. Adjust REG poteniometer
VR3 for exactly 6 Volt reading on VTVM.
10. CLARIFIER ADJUSTMENT : See Fig.C-(8)
11.
The transmitting and the receiving frequencies shall be in coincidence at the CLARIFIER control OFF position.
If not, adjust the CLARIFIER control VR4 on PCB No. P04-007A.
Also both transmit and receive frequencies coincide at CLARIFIER control 0 position. If not, adjust a potentiometer
VRA located near the CLARIFIER control under the main chassis.
BIAS ADJUSTMENT : See Fig.C- (9)
The final amplifier bias must be checked to insure linearity and normal operating plate dissipation for the final tubes.
Adjust the BIAS control VR2 on PCB No.P04-007Aas follows; Set the transceiver at receive mode and allow the
transceiver time to reach operating temperature.
Set MODE switch to USB, METER to IC and the OPERATION switch to MOX for transmit condition, The meter will
indicate PA plate current (idle or rest current). Idle plate current is 60 MA if the bias is correct. If the idle plate current
is other than 60 MA, adjust BIAS control for 60 MA with zero transmitter output.
There is a little difference in the idle current between AC and DC operation. Adjust the idle current to 60MA for
each operation,
12. FINAL AMPLIFIER NEUTRALIZATION : See Fig.C -(10)
(1)
(2)
(4)
(5)
(6)
(7)
When replacing the final amplifier tubes, it may be necessary to reset the bias to give correct idle current and check
neutralization. Using the procedure outlined below will guarantee maximum output and long tube life.
CAUTION
HIGH VOLTAGES ARE PRESENT ON UNDERSIDE OF CHASSIS AND INSIDE OF FINAL COMPARTMENT.
USE GREAT CARE WHILE MAKING ADJUSTMENTS WITH WIRING EXPOSED.
Connect a dummy load to antenna, and set meter to IC.
Locate TC-27, the neutralization variable capacitor shaft on the underside of chassis near the driver stage band switch
wafer, in the final amplifier section.
Check final amplifier idle current in USB or LSB position and adjust as described before.
Tune up the transceiver at 29 MHz, 10B or 10C band with MODE switch at TUNE position, and advance MIC GAIN
CARRIER until meter IC reads 100 MA.
Rotate PLATE tuning control and observe dip as indicated on the meter. If the dip is not prominent, reduce loading
control slightly for better indication. As the PLATE control is rotated the meter should rise equally and smoothly on
either side of maximum dip indication.
Determine which side of the dip rises abruptly. Set PLATE control slightly to this side of dip keeping the meter reading
below 100 MA.
Using no metallic tuning wand, rotate neutralization capacitor shaft very slightly in the direction which reduces the
current shown on the meter. Repeat Steps 6 and 7 until the meter indicates a smooth and equal rise on either side of
the maximum dip point,
The final compartment cover must be in place to supply the RF shielding required during the neutralization procedure.
VFO CHECK POINT (CB23CH,9MHz)
VR:
Tan
L22 T 104
T107
T1o6
L28 T10s
TC27
T14
T12
FIG.D (BOTTOM VIEW)
e
us
ur
||
ed
E
=
a
MM
|
о
oo
hai
5 he
(optinon)
FIG.E
13. ALIGNMENT OF TRANSMITTER MIXER/DRIVER AND RECEIVER FRONT END STAGES
(Refer to Fig. C,D, E a Е)
(1)
(2)
(3)
(4)
The final amplifier bias adjustment must be properly set per paragraph 9 before extensive operation of the transmitter
is attempted. When it is assumed that the signal generating stages of the transceiver are functioning properly, use
the internally generated signal of the transceiver to align the transmitter mixer and driver stages and RF signal generator
to align the receiver front end stage.
CAUTION
Be always sure that a 50-ohm dummy load is connected to the antenna jack for alignment of transmitter.
Connect the 50-ohm dummy load to the antenna jack. Set the BAND switch at 10D and tune up the transceiver at
30,000 Khz and the MOX/PTT/VOX switch at MOX.
Advance the CARRIER control and tune the final amplifier. Maintain the meter reading IC 100 MA at resonance
with the CARRIER control. Set trimmer TC5 at mid-capacitance position adjust slugs of T102 and T103 for
maximum output at the dummy load. Reduce the transmitter output to zero with the CARRIER control.
Set the MOX/PTT/VOX switch at PTT mode, RF and AF GAIN control at maximum, CLARIFIER control
at OFF, and NOISE BLANKER at OFF. Do not change VFO setting and PRESELECTOR control setting set up
in Step 1. Connect the SSG, tuned to 30,000 KHz, to the antenna jack and adjust it for approximately 1,000 Hz
beat tone.
Use just enough signal generator output (approximately 1 microvolt for an aligned unit) to keep from developing AGC
voltage (no S-meter indication). Set trimmer TC15 at mid capacitance position. Adjust a slug of T-101 for maximum
audio output without developing AGC voltage.
Set the BAND switch at 10A and tune up the transceiver at 28,000KHz with the MOX/PTT/VOX switch at MOX.
Advance the CARRIER control and tune the final amplifier. Maintain the meter reading 100 MA with the
CARRIER control as described in Step 1.
Set the PRESELECTOR control at the lower end of 10 and 11 meter segment and adjust trimmer TC5 for maximum
output at the dummy load. Reduce the transmitter output to zero with the CARRIER control.
Set the MOX/PTT/VOX switch at PTT mode, and without changing the VFO or PRESELECTOR control settings,
tune the RF signal generator to 28,000 KHz and obtain 1,000 Hz beat note. Control the signal generator output
and adjust trimmer TC15 for maximum audio output as described in Step 2.
(3)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
14.
15.
Repeat step 1, 2, 3 and 4 to peak the coil adjustments for the 10 meter band.
Set the BAND switch at 15 and tune up the transceiver at 21,000 KHz with the PRESELECTOR at lower edge of
15 meter segment. Adjust trimmer TC4 and TC9 for maximum transmitter output at dummy load.
Set the MOX/PTT/VOX switch at PTT mode, and without changing the VFO or PRESELECTOR settings, tune the
RF signal generator at 21,000 KHz and obtain the 1,000 Hz beat note, and adjust trimmer TC14 for maximum
audio output as described in Step 2.
Repeat the procedures given in Step 6 and 7 at 20 meter band. The trimmers, TC3 and TC8, are used for maximum
transmitter output and TC13 for maximum audio output in receive,
Set the BAND switch at.80, VFO at 4,000 KHz, and the PRESELECTOR at 12 o'clock position. Set TC1 and TC6
at mid-capacitance point and adjust T105 and T106 for maximum transmitter output at dummy load.
Set the MOX/PTT/VOX switch at PTT mode, and without changing the VFO or PRESELECTOR settings, tune the
RF signal generator at 4,000 KHz and obtain the 1,000 Hz beat note, and set TC11 at mid-capacitance point. Adjust
T104 for maximum audio output as described in Step 2.
Set the PRESELECTOR at the lower edge of 80 meter segment, VFO at 3,500 KHz, and adjust TC1 and TC6 for
maximum transmitter output at dummy load.
Set the MOX/PTT/VOX switch at PTT mode, and without changing the VFO or PRESELECTOR setting, tune the
RF signal generator at 3,500 KHz and obtain 1,000 Hz beat note. Adjust TC11 for maximum audio output
as described in Step 2.
Repeat Step 9, 10, 11 and 12 to peak the coil adjustments for 80 meter band.
Set the BAND switch at 40, VFO at 7,000 KHz and the PRESELECTOR at lower edge of 40 meter segment.
Adjust TC2 and TC7 for maximum transmitter power output at dummy load.
Set the MOX/PTT/VOX switch to PTT mode, and without changing the VFO or PRESELECTOR settings, tune the
RF signal generator at 7,000 KHz and obtain 1,000 Hz beat note. Adjust TC12 for maximum audio output as
described in Step 2.
Set the BAND switch at 160, VFO at 1,800 KHz and the PRESELECTOR at lower edge of 160 meter segment,
and adjust TC10 and TC28 for maximum transmitter output at dummy load.
Set the MIX/PTT/VOX switch to PTT mode, and without changing the VFO or PRESELECTOR settings, tune
the RF signal generator at 1.8 MHz and obtain 1,000 Hz beat note. Adjust TC29 for maximum audio dutput as
described in Step. 2.
HETERODYNE CRYSTAL OSCILLATOR ALIGNMENT (Refer to Fig. D, E & F)
The heterodyne crystal oscillation injection may be checked in the following manner. Connect the VTVM RF probe
to test point. Injection is normal, if the injection voltage measures 0.3 - 0.4 volt RMS on all bands. If not, the
alignment is required. Set the BAND switch at 10D, TC24 at 1/3 capacitance position, and adjust T111 for 0.3 - 0.4
volt RMS reading on VTVM. Then adjust TC23, TC22, TC21, ..., TC17 and TC16 for each of the bands to read
0.3 - 0.4 volt RMS on VTVM.
CAUTION
For setting the trimmers (TC24 .... TC16) turn them in the direction in which the capacitance is increased and set
them at the specified voltage reading.
For setting the T111 (oscillator coil), be aware that there are two oscillation points. Turn the core clockwise and
set it at the farthermost oscillation point.
TRAP COIL ALIGNMENT (Refer to Fig. C & D)
L28 on PCB No.PO4-006A is used to eliminate spurious radiation on 15 meter band. For alignment, tune the
transciever at 21,200 KHz for maximum output at dummy load. To measure spurious radiation, use the
S-meter of another receiver and tune it to 21,180 KHz or 21,200 KHz where a spurious signal can be heard.
Adjust L28 for minimum S-meter reasing without decreasing power output of the transceiver.
16.
L22 is used to eliminate internal beat interference. For alignment, set the transceiver for 10B band in USB
mode. Sweep around 28,605 KHz to locate beat tone. Adjust L22 for minimum S-meter reading.
T107 is used to eliminate an external interference in band 40 such as a strong short wave broadcasting fed into
the 1st IF (5,520 — 6,020 KHz) through the RF amplifier. Adjust T107 so that the interference is reduced to
minimum, |
SYNTHESIZED CB CHANNEL HETERODYNE CRYSTAL OSCILLATOR ALIGNMENT
(Refer to Fig. C, D & G)
A. FOR 9 MHz synthesizing crystals (X1 — X4, CH1)
п ко юн
п > » Dr 6
Connect VTVM and frequency counter at VFO check point (See Fig. D).
Set BAND switch at 11, VFO SELECTOR switch at CB CH, CB CHANNEL switch at 1, or Channel 1.
Set POWER switch only on.
Set MOX/PTT/VOX switch at MOX mode.
Adjust TC1 for X1 to read the frequency per the frequency table below on the frequency counter: the
optimum output level is 0.15 — 0.25V rms.
The same procedure should be followed to adjust TC2, TC3 & TC4 for X2, X3 & X4 with the CB CHANNEL
switch set at 2, 3 & 4 respectively.
Set VFO SELECTOR switch at CH1 and adjust TC11 for an optional channel crystal CHI.
For 30 MHz synthesizing crystals (X5 — X10)
Connect VTVM and frequency counter at HETERODYNE CRYSTAL OSCILLATOR CHECK POINT (See Fig. C).
Follow the above procedures, A.2 & 3.
Set MOX/PTT/VOX switch at PTT mode.
Adjust TC5 for X5 to read the frequency per the frequency table below on the frequency counter.
The same procedure shold be followed to adjust TC6, TC7, TC8, TC9 8: TC10 for X6, X7, X8, X9 8: X10
with the CB CHANNEL switch set at 5, 9, 13, 17 & 21. respectively,
Set MOX/PTT/VOX switch at MOX mode and adjust L303 (See Fig. G) for maximum VTVM reading. Then
adjust VR1 to set VTVM reading at 0.38V (+0.02V).
Repeat the procedures 4 and 5.
CHANNEL | TRANSMIT & RECEIVE | 9MHZ SYNTHESIZING | 30MHZ SYNTHSIZING
NO. FREQUENCIES (MHZ) CRYSTALS CRYSTALS
26,965 X1; 9184.3 KHz
91 KHz X5; 32.97 MHz
X3: 9164.3 KHz
X4: 91
xl
X6; 33.02 MHz
X7; 33.07 MHz
X8 33.12 MHz
X9: 33.17 MHz
X10; 33,22 MHz
17. HOW TO MAKE USE OF OPTIONAL, FIXED CHANNEL
Any one of the frequencies out of 1.8 — 30 MHz amateur bands and CB band can be operated as fixed channel
by adding proper crystal to the socket provided on PCB P06-014. The size of the crystal is HC- 25/u, and the
formula for calculation of crystal frequency is as follows:
X = f1— Desired channel freuquency
щей Crystal frequency
£1 ..... to be chosen from the table below according to the band and the mode.
Remarks: 1. X should be within 8.7 — 9.2 Mhz.
2. It should be noted that this crystal operates with the BAND switch set at any position,
‘which means for instance that the crystal of 3758.5 KHz for 21.440 MHz (USB) in the
15 meter band functions at 7.443 MHz (LSB), if operated with the BAND switch set at
40 position. Therefore, care should be taken that the BAND switch sould be set at 15 in
this case.
3. The frequency alignment for this channel should be followed as in Paragraph 16. A
(Page 16).
Calculation examples:
1. For a fixed channel of 7.055 MHz,LSB (40 meter band):
Unit : KHz
BAND LSB USB AM/CW
80 12,701.5 12,698.5 12,699.3
40 16,201.5 16,198.5 16,199.3
20 23,201.5 23,198.5 23,199.3
15 30,201.5 30,198.5 30,199.3
11 36,201.5 36,198.5 36,199.3
10A 37,201.5 37,198.5 37,199.3
10B 37,701.5 37,698.5 37,699.3
10C 38,201.5 38,198.5 38,199.3
10D 38,701.5 38,698.5 38,699.3
X = 16,201.5 KHz — 7,055 KHz = 9,146.5 KHz
2, For a fixed channel of 14.250 MHz, USB (20 meter band):
Х = 23,198.5 KHz — 14,250 KHz = 8,948.5 KHz
VIII DIAGRAMS
vin-1 BLOCK DIAGRAM
2 No5 No.4
[ AF UNIT | [ [email protected] |!
0501 0502 503 | |
MIC AMP MIC AMP
No.
MIXER UNIT
Q201
2
No. |
| RF UNIT |
Sin
[ma IN Il
: Nm
pen VE
a
1 |
J H Е
Q5 Q506 0507 Q402 ;
{OX AME OC AMP DELAYCONT | ¡AM/CW ‘95° [40 au 8 03024: amp | r d--|-57-l2screa + a | PA |
ё ее i= Il |
3179.3KHz т ' Q202 |. |
1 ' | REC 2nd MIX | | чей 910! Eur : |
1 î ! I
Q510 3178.5KHz Q403 “reg PT A v3 I
RELAY CONT. E. —osc SSB DET Q303jIFAMP ' E E | Ш EA |
т y rt ee AA Mia
= 1 .
x эй 1 т Ве-=--=====--- 4 1 1 I
LSB Lis ' i 7-4 à
3181.5KHz | ' | No.7 | + ||
9511 | Q505 0513 - = “VFO | NIT | ; ВЕ Ee
SIDE TONE | ANTI TRIP ANTI TRIP + AM DET i AGC DET | VFO UNIT : El
73 acravabe-ocrarabls. | р-------------- -- ; +- | à ' 1 mmm memes À
; Food {i | rose | |! |
i | — I 1
$ I 1 L
| | „мен = i ad
930 19304 i "loa
Q512 AF AMP I SM EL AGC AMP | | |:
pe Tarzoow]--1----9------- - о e | ie JE
' Li 1
Ey | pe Earl reee. 4
> e pata
No.6 VFO COIL | 1 160 EX7520MH7) 10A El 34.020MHz
! 2 . o | B80 E 9520MHz 108 В 34.520
t-—q-JT | INT. SP : "REG & CAL UNIT 1 1] 1 40813020 loc & 35.020
; Q601 r-------1 0604 | id ' 20 § 20.020 10D & 35.520
y RECI ATUR ‚ os : Q602 | AMP == | L.L|-s 158 27.020 JJY 5 16-020
ext.sp Noo |! ber e LE
[RECT UNIT : 10GKHz 251KHz r -
| ово! 0802 0803 |!
а | IMULT i | ose BUFF BUFF |!
DC-DC a 10606: 0603
| nel [esca72] 25C735|--—-+ =
| | ‘ zor = | | | & 9184.3 KHz ı 8 зат
al 12V - - - 2 & 9174.3 2 № 38.02
x2 3 B 9164.3 3 83307
160V . 4 В 9144.3 CB CH UNIT 4 g 3312
¡Q2 |pTGINOB] | [151942] 15%. ——e TRANSMIT = 5 & 33.47 |
| | = | ----— RECEIVE CHI 5 e E 3322|
Q3 TRANS 2nd MIX Q2 REC Ist MIX Ql RF Q4 LOCAL OSC Q5 BUFFER
2SC784R 25C784R 3SK39Q 2SC829B 2SC828R
RIZ 100K Li 2404H R7 100
= Y _ _ _ a =
il el Js. |; s x] lal il
° = o = ws о N > o 2
| —> № "| == № nS ol 5
= a = o
oc
ca
DI (NO)
CI7 I00P Pr 151007 RS ib ll
- 1-е ГМ
C5 0.047
cis Do y оф ele м 5°61 „|2 x x
Y =- o = 5 o ->
TP2 24 Ta o | © 24 гок E $ = "= E 3| «= 8 ВЕ
ой E 0 = = =T o © © = x &
o a © Po a Oo E | o ю m x
oi te x o o ME E ©
Ns AAR p= ча 5 I _
a r YY wT own o 77 7”
к oF : E | re
es 56072W a
©
=
cI4 OOI
esl i
ST
77 Г
rd if 16) (15) (14) (13 (io) (9 f Я | PC4-00IA
ш хно 3 >XZO N z 52 u = ДЕБ
BE ZR ile Erggrsa
5 4 ET КОФЕ > bo à
= < + Q —u OZ © > <
> 2 sé re Dé + i 8
E a + > a
—18 —
NO.2 MIXER UNIT
TRANS Ist MIX
CA3053
Ql
Q2 REC 2nd MIX
3SK39Q
PO4-002A
Hoge 17
—k
1900 OI
L2 2704H
X001 NY
419
ely
£lg
612
TI
122
001 bIy
881 XL
NI XIN PVZXH
3
o*y
3
NIOJA
3
0:1
3
AS'El+
3
NLXIWNBIXL
3
LNO XIN PUEXH
3
3
IF UNIT
NO.3
1F
Q3 IF Q2 IF Ql
25C784R MKIOF
CA3053
Q4,5 METER
2SC828Q
R33 470
co
о
400151
17 | »26 6
MET
914
HYob2 91
3
934 A9+
5 [o
5
© 1700
5 ER H aN ES
bcs ve
® 1no 41
a aN ES
HOPE LT yp) :
NI AI
2600 le
100 929 300W
100
28A%, e |
® 7500" SED
IDO 99 R
ass
UN NVO
100130 ИУ
AS'EI+
YILIN-5
3
C44 IOOP
A
ISIOO7
Di2
1SI007x4
DI3-16
Dll 569150 DIO 569150
J
RESIK
NO.4 MOD. & OSC. UNIT
Ql IF AMP. Q3 SSB OSC Q4 BUFF
MKIOD USB [3 тн 2SC372Y
01-4 151007х 4
DI C25 30P
RI6 47K
RI 470
C5 0.047
C22 0.01
с24 0.01
C26 0.047
«a Q2 AM MOD/CW BUFF es; (NRO) QS AM/CW OSC
3 2SC372Y
404
x
SE
N +
100, RII 6.8K
CIZ 0.01
IK
X3 3179:3KHz
So > e ен о во Ng
CER BENT"
3 Eom+ 36% & сан бы
A x => © + 2° $ Sa
Ql MIC AMP Q2,3 MIC AMP Q4,5,6 VOXAMP 6 ANTITRIP Q8,9 RELAY CONT Q 10
MKIOF 2SC372Y 25C828R Q7 2SA564R 2SC828P 25ASE4R
R22 [OK
0047 Qe
QIl SIDE TONE
2SC373
©
o
T301
C33
0.003 R40 10K
C34
08 569150
AF AMP
HAI306W
C45 0.022
QI3 ANTI TRIP
2SC828R
R41 10K
C27 0.047
R45 100
PO4-005A
[a]
E ur NEN u8% E Zw F-90900 Zwwkgy
56> 2 eu 683 0 ou 7 ZZ o mm
© Y 95029 + = w + +
= = WE = Y
250372 Y
0.047
AM/CW L402
NO.G6 REG.&CALIB.
UNIT
REGULATE
Q6 Q5
2SC372Y 2SC697E
100 Ва OSC
| 2SC735Y
Q2
25C735Y
с5
25KHz MULTI
Q3
25C735Y
12 Bop XI
A oe
0
I
AñALA
АУМ
vu
BUFF
Q4
2SCT35Y
% Cl , 250P
a
VR2(BIAS)
RI3 10K RI7 4.7K(IW)
AAAA AAA > AAA о.
Мути Y Y yyy >
10K >
23 2 >
né 9 =) 3 8
—|m- 2|- ® +
x J EZ 3 +
23 +3 +2 ю |+ a --
MS + m
=) = Oo | o ad
0 on
Le] —
ir
R14
1.5K
AAAA =i
YY Y DL E
= RAI
18 15194 © (FREQ ADJ) 555 |
so © A dy Ау
x = R22 3.3K
AMARA
77 yyy а e
NSN
c20 ,22/2504 Tra
— + —
Cal „5%
2 os| |
50V =
©
©
X
in
| |
NO.7 VFO UNIT
Ql OSC
3SK22G
E |
-60V (FINAL) м)
VR3
T;0
R;0
-100у ——O— —
+160у ©)
VR3 (sw) FD
S-2F0
(MODE SW
<
=
o
=
>
©
q
i
Q2 BUFF
3SK22G
= o | — — —
R2 100K
LI
C3 0.01
y
R3 330
a
ui
i
x
«q
—
u
40pH *
R6330| 13%
my, 37 190
сб 0001
+
AAAA
>
©
i
of
о
Ш
x
>
o
+
E
>
a
=
+
$9 IOOKHz
CALIB OUT
$9 25KHz
Q3 AMP
2SC372Y
(RI
N
Cll 1000P |©
gg
RIO 270
OIC af (e) (7) (8) РО4-007
| 1K1/2W)
2
L6 240pH
ча
<
«©
=
©
<
+
L7 240pH
—21—
R4 100 Lcis
NPO J oo!
Cl4 6P RI IOK
zi - Are =
' - L =
© 059
sap es
_ aL _ PO6-002A _
[
а. > a a a [
и | gl EL © e | So
ST a 3 o 3 ~— = SE
жоО o ; T ©
у a oN x © = O
1 yA
777 77M =
DC+6V
REG
CLARI
4) NO.5 AF UNIT
Ql MIC AMP Q2,3 MIC AMP Q4,5,6 VOXAMP & ANTI TRIP Q8,9 RELAY CONT QIO
MKIOF 2SC372Y 25C828R Q7 2SA564R 25C828P 2SA564R
0047 Q6
|
47K
= €
S 0003 R40!OK
C34
R35 33K
AF AMP
HAIZO6W
o
8:
®
©
Ls)
o
a
C45 0.022
QI3 ANTI TRIP
2SC828R
R44 470
PO4-005A
a > >
PAP EEE НН ОЕ
>0> E сы бо 4 nx =7u o mm
o © ge ew + w + +
= = E = x
5) NO.9 RECT UNIT
|
D5-D6 о
ho — 8 4 DC -IOOV
! Ця о =“ Loss |
DE, “fr I о 4 AC 120V |
1 z 4 DC I60V
Wo
| “TS
DI~D4 FR2-12
|
о 4 AC 480V
| Y x=
He, yo я +600V
ON «9%
o
D4 Ry: “o il I
—« AC 480V
| D7~D8 P300D | |
| ЕМ
= DC 13.5V
= =. Na E Î
© | R3 3,3 IW A OF
= ANW 4 EM 08 |07 33
> o я! УМУ a D 38 AC 10.5V
o Tz a B
I So” Cu
= A |
PO6-00I |
J9-10
reel 30%S-X9E |
1 OZOT£ |!
(SVIB)EA'ZA
0425
@ ©
== |
(AOZ-)SVIB
AOZZIV
=
© 800 00
500 68 66 00]
[9 ©
sg © ©
AO9I 9S EA
® ©
dos Sse=1131
YINWIEL dé
v600-90d
(02s'L) 091
0zo'sl
ozs'sE aol
ozo'se 301
025'b€ 801
ZNId DIV
(d4~V) +S
9, Le
o
+0
£0
18 0
—— AY
\ | HL'ZOIL SOI PON
1 —in.Q0 = =
\ “210-964”
В [ |
| oan |
v200-20d
=
[pNIOVOT]
exdSee SIA 4b00
и
I
I
y
1
1
=
0£'62423
V,00-90d
d0üS #191
(V)HIWNIEL
VOIO-90d
(3a-v)es
5, 5
WYO + 8571
oË
MI- O -asn
ЭМП.
a
ZNid bin
DIV
11-(S) KW
dool 2931 (9) Y3AWIHL
H-(DPW
NVUOVIC OILVINIAHOS E-IA
— 23 —
CORRECTION SHEET
1)
Line or
Page location Now reads Should read
1 9th from bottom Sideb and Suppression Sideband Suppression
2 12th from top Fet’s FETs
4 14th from bottom 14 KHz 15 KHz
8 2nd from bottom eain gain
9 4th from bottom younder younger
18 VIII—1 CB CH UNIT CB CH OSC UNIT
BLOCK DIAGRAM
18 VIII—2 The diagram should read as 3) below.
PCB DIAGRAM
No. 1 RF UNIT
19 No. 3 IF UNIT R32 2.2K R32 3.3K
- 20 No. 5 AF UNIT The diagram should read as 4) on reverse side.
22 1st from top FIX OSC UNIT CB CH OSC UNIT
22 No. 9 RECT UNIT The diagram should read as 5) on reverse side.
|
2) The following is supplemented to the frequency chart in Page 17.
Unit: KHz
| BAND LSB USB AM/CW |]
| 160 10,701.5 10,698.5 10,6993 |
3) NO.1 RF UNIT
Q3 TRANS 2nd MIX Q2 REC Ist MIX Ql RF Q4 LOCAL OSC Q5 BUFFER
25C784R 25C784R 35K39Q ET 25C828R Ce
CIT 100P 1 sor Bou * Re Joo
TP2 Te <| 3° | |3[ 1,58 | A Î ua els 1 7»
I
Ls
He
HS
LOCAL IN (6)
+13.5Y . 17
E
TX 2nd MIX
RX Ist. MIX
IN
Cl4 0.0!
»
|| li |
ВВ ЕР
E
TS
CRYSTAL — O —
SOCKET
OUT
R;0
TI
LOCAL OUT
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement