Sommerkamp TS-680DX User manual

CITIZENS BAND TRANSCEIVER
INSTRUCTION MANUAL
M ODEL: TS-BBO DX

SPECIFICATIONS for TS-680DX
Semiconductors:
Transmitter System:
Frequency:
Output Power:
Band Width:
Antenna impédance:
Recei er System:
Sensiti ity:
Intermediate Frequency:
Recei er Selecti ity:
Squelch Sensiti ity:
Audio Output Power:
Power Source:
Microphone:
Speaker:
Sïze:
Weight: .
Accessories:
4 Integrated Circuits,
2 FET, 22 Transistors.
1 SCR, 23 Silicon diode.
2 Varicap, 5 Zener diode.
Synthesized PLL controlled.
Collector modulation AM.
80 Channels on 27 MHz.
10 Watts at 13.8V DC.
8 KHz. (max.)
50-52 ohms.
Double con ersion superheterodyne,
PLL controlled.
I/*V or better for lOOmW output,
10 dB signal to noise ratio.
Ist I. F. 10.7MHz, 2nd I. F. 455KHz.
40 dB down at 10 KHz. or more.
1/^V.
2 watts in 10% djstortion.
11—16V D. C. Negati e Ground.
Fuse 5A.
Dynamic type with press-talk switch.
Impédance 500 ohm.
Dynamic type, Voice coil Impédance 8 ohm.
156X58X205 mm.
2.3 kg.
Mounting bracket, Mounting hardware,
power cord.
SOMMERKAMP ELECTRONIC SAS
CH-69Ü3 LUGANO, RO. BOX 1 6
SWITZERLAND
TEL. [phone] TELEX'- 931-4

CONTROL LOCATIONS:
EXT. SP. JACK
MOBILE
BRACKET
POWER-SW/VOLUME
KNOB
SQUELCH/ANL-OFF
KNOB
RF POWER & "S' METER
DELTA-TUNE
CHANNEL SELECTOR KNOB—1
PRESS. TO-TALK BUTTON
MICROPHONE
'-MICROPHONE JACK
-VSWR. LIGHT
TRANSMITTING. LIGHT
(PUSH. CALL. BUTTON)
PACKING LIST
Beside this manuał, the carton shall contain the following items:
1. Transcei er TS-680DX
1. Mounting bracket.
4. Screw for Mounting bracket.
1. Microphone hanger.
1. Microphone.
- 2

GENERAL DESCP^TION
Your SOMMERKAMP TS-680DX transcei er has been désignée) for continous
hea y duty mobile and base Station application.
It can be operated with a microphone and internal speaker or handset, speaker/
microphone combination, telephoneset incorporating automatic oice operated
transmit/recei e switching, externat sélecti e calling with automatic answer
back and many more.
GENERAL
The transcei er is designed to operate from 13.8 Volt DC powersupply as a
base or mobile station. It's straght forward 80 channel capability allows it to
operate on any channel within 26.965.and 27.755 MHz.
RECEIVER SECTION
The recei er section is designed to recei e amplitude modulated (AM/A3)
signais in the 26.965 to 27.755 MHZ. (11 meter) citizens band .
The unique combination of low noise Field Effect Transistor (FET), double
con ersion, a combination of mechanical ceramic, and L/C filters, fully auto
matic noise limiter (ANL) and a hifi quality speaker amplifier will gi e you
exceptional réception quality in this fine piece of equipment.
In addition, the abo e combination of the latest technology pro ides you with
a sensiti ity and unwanted signal rejection and noise suppression a ailable
pre iously only in space and military communication equipment.
The power supply of the recei er RF. IF. and oscillator section is stabilized
by an extreme Sharp cut-off Zener diode to obtain the high sensiti ity and
unwanted signal rejection. The fully automatic sériés gâte noise limiter, which
irtually cuts off the audio output during ignition noise puises, is defeatable
to make e en the weakest signal audible which otherwise would be eut off
by the threshold le el of the ANL switching diode.
The high squelch sensiti ity is achie ed by using a seperate squelch detector
and switching circuit with a carefully balanced hystérésis. The trans-
formerless hifi quality audio power amplifier will dri e any load between 8
ohms and indefininite such as internai speaker or external speaker/microphone
or headset combinations ha ing the abo e impédances.
The meter indicates the field strength during réception of a signal.
3

TRANSMITTER &. MOD LATOR SECTION:
The trasmitter section is désignée) for continous hea y duty transmissiW. of
amplitude modulated (AM/A3) signais in the 26.965 to 27.755 MH2. (11 meter)
citizens band.
The transmitter consists of a Phase Locked Loop circuit and an one-crystal
controlled oscillator, of which output is synthesized in a dass B mixer, followd
by a double tuned filter,dass ABI buffers, and a highly efficient collector-
modulated dass C dri er and power output stage, coupled by séries and pi-
matching filters to the antenna jack.
The modulator consists of an input audio filter, ALC amplifier integrated pre-
and power amplifier and modulation transformer. This gi es you the lowest
possible modulation distortion and up to 100% modulation.
The input is designed for 500 ohm dynamie microphone or 32 ohm speaker/
microphone combination with a 1K ohm resistor in sériés.
RECEIVE/TRANSMIT SWITCHING
The recei e/transmit switching is done by a single pole, single throw switch
in the microphone and a combination of NPN and PNP switching transistors.
METER
The combination meter pro ides you with the following functions:
During recei e mode ................ it indicates the incoming signal strength.
During transmit mode ............ it indicates the output power.
MOBILE INSTALLATION
Mounting bracket and screws are supplied for mounting the transcei er under-
neath the dashboard. Microphone hanger and screws are also supplied. For
electrical connection, first make sure that the transcei er is turned off.
Connect the red wire to the ACC terminal of the ignition switch or + terminal
of battery and ground the black wire to the chassis of the rehicle. The black
wire should be grounded as short as possible to minimize noise interférence.
This transcei er is designed for use with the negati e ground system.
4

Connect the antenna pług to the antenna jack with an SWR-Meter inserted
into the antenna cable.
Connect the microphone to the microphone jack.
Switch the transcei er ON.
The recei ing, meter and the channel lamp, shall light up.
Turn the squelch control to min. (ANL OFF)
Turę the Volume control to max. Until you hear a rushing sound from the
speaker.
Swith the channel selector to CH. 1.
Push the transmit button on the microphone and check with the SWR-Meter
Immediately the SWR of your antenna.
The SWR must be less than 1 to 2. Do this within 3 seconds, because if the
SWR is higher than 1 to 2 it is ery likely that the transmitting transistors
will be damaged if you operate the transmitter too long with a antenna
ha ing a too high SWR. Also read carefully the recommendations on
antennas.
NOTE: In case the SWR is too high, the Automatic protection circuit will
switch off the transmitter.
If the SWR is less than 1 to 2 continue Checkout, if it is more than 1 to 2
repair or replace your antenna.
5

Check that the meter needle is near the red mark during transmitting. Talk
into the microphone. The meter needle shall mo e a little. Release the trans
mit button and switch the channel selector to Channel 1,2 etc. until you
recei e a station.
Wait until this station stops to transmit and turn the Squelch control slowly
to max. Until the background noise just disappears. When the station Starts
to transmit again, you will hear this station, but you will not hear the back
-ground noise during non transmitting periods.
OPERATING INSTR CTONS
The transcei er is ready to operate when it is installed with an antenna
properly connected. Note that the communication range differs depending upon
the en ironment where the transcei er is operated.
j»You may reach 30 or 40 kilometers where no obstacle exists, but the range
may be limited to 5 or 6 kilometers in cities where many_ high buildings
disturb the communication.
1) Turn the set on by Switching the LOW CH-OFF-HIGH CH. snap switch to
the desired channel range and the channel dial will be lighted. Turn
the olume control clockwise to increase the audio sound. Note that the *
olume control. knob is only for adjusting the audio olume, not to in
crease the transmitting power.
2) Set the-DELTA-TUNE for best réception.
3) Turn the squelch control clockwise until incoming noise is efiminated. Do
not turn it excessi ely as the sensiti ity may be reduced.
4) Turn the squelch control counter-clockwise to switch off the ANL
(Automatic Noise Limiter).
5) Turn the channel selector knob to the desired channel.
6) For. transmitting, press the button on the microphone and speak into it
normally. Release the button for recei ing.
METER
The meter reading indicates the signal strength at recei ing, and functions as
an output indicator at transmitting, and the meter pointer should be within
the red zone under the normal conditions.
CIRC IT PROTECTION INDICATION LAMP
The lamp is on when the antenna is mismatched, and the transmitting circuit
will be eut off.
6 —

LIST OF CHANNEL FREQ ENCIES
N i
X
Щ
LT) юmmm LO Ю LO LO LO LO Ю LO Ю LO LO LO LO LO Ю
LO n-CO CT» OpH CM CO
s
LO CO N . no CT» OCM
XLD Ю Ю Ю CO CO CO CO CO CO CO CO CD N N N NNN
ON i N i N K KKKKN K N i N i N NNN i N N i Ni N
CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM
X
O
X
*
NJ
X
sЮЮLO LO O Ю LO LO LO LO Ю Ю Ю LO LO LO Ю LO Ю LO
'— •" LO N . 00 o> Or—ł CM CO LO CO N . 00 CT» O CM 00 3LO
rH rH H rH CM CM CM CM CM CM CM CM CM CM CO CT) CO CO CO
X
ON i K N NNNN K KKNi N i N N N N i NNNN i
CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM
$
O
_J
d
Z
pHCM CO *3* LO CO N» 00 m O I-H CM ro SЮCO N no en §
XCM CM CM CM CM CM CM CM CM CO CO CO CT) CT) CO CO CO CO
O
N i
X
s
'
f> n Ю L O I O LO LO L O LO LO LO LO LO Ю LO Ю LO LO ЮLO
Xсо
CO N .
CO 00
CO en
CO §«3* CM
*3* CO
"З' 5Ю
M- CO N . <3* 3en 'З - 8rH
LO CM ЮCO ЮsLO
LO
ON i N i N N N NN» KSNi SN i N N - N i N i NNN i N
CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM
X
O
X
NJ
X
2«n 1Л 1П LO IO Ю LO LO Ю LO LO LO Ю LO Ю LO LO LO LO
X
LO
en N . CT» 00
СП 2>
O) 8 " o CM O ss
8
s
N .
O8.8 O
rH rH
rH CM
rH CO »3 HLO rH
OCO CO CO CO N N KK|N N i N i N i N i NN i N i NNN N
CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM CM
г
4
O
_
d
Z
iH CM CO LD CO N00 en OrH CM CO LO CO N00 en O
X
rH -H rH rH rH rH rH rH rH rH CM
O
7

. .JROPHONE JACK
The -pir. DIN standard accessory iack
1. Internsi speaker
2. AF. ou: for sélective cal!.
3. Audio output 'Z S ohrr-10K ohnv
4. Microphone mput Z 600- 10K ohm'
has the following internai connections:
5. N C
6. -A 12V for VOX unit etc.
. Transm it/Receive switching.
Case = ground
inserted in the microphone
Aiways ooerate the transceiver with the microphone plug
iack. or w ith the following external connections:
m-cwo** ox
2 20 j I ^ 1 VOX I CONTRO-
600- ÏO*'. ohrr.
Microsnone
b £» terne) microohone'SDeaker with PTT.
ро;ч 10
X о' ьо
? I P
=□3
- 6 РП
|°5 2iO—j L
i OS -O :
o !
Боеакег
_ г Г ) 600 <1
~<-i/ MscrotxOK ohm
oohone
ó. Internat connection
DE7. OUT
1 -------- VA*—
-1 2.7K ohm
----------L _r
Receiver ■C7r_16i
Ar Amp
---------- с ------ ( --------- 1 h Switch
PTT' i. = SPEAKER
1 t '
5 2
>3 30- fffiï
Ł*;e.T.3i mcropnone
- Heasse; or Teieononese; with V0>
; ------------------------ -t-rf l sMa.P-
? loL ? .о-, PT A N T .j (tRi)
1 6 :’ JO 1 t I Vo,ce Con:r3;
1 . I j i — 12 v p
j 07p60—p --- “ j
^ rv , ł
:>non*-
600 10k onm

COMPLETE PARTS LAYOUT

PRtNTED CIRCUIT BOARD PARTS LAYOUT T s éSoü'X

CIRCUIT DIAGRAM / 5 m дк
' f ł J ч- 4 ч- f

PARTS LIST for Tq-680DX
DESIGNATION PARTS NAME PARTS N0.
MP-201 Front Frame 483014-S
MP-202B Chassis Frame 502035
MP-203B Back Parnel 504297
MP-105 Cabinet Co er (Upper) 483016
MP-124 Cabinet Co er (Lower) 514346
MP-107 Mounting Bracket . 484085
Front Plate (L) 524392
MP-304 Front Plate (R) 494187-R
Brand Plate 524390
Back Plate 524389
MP-110 Mouhting Bracket for Meter 484064
MP-208 Mounting Bracket for Output Transformer 504296
MP-362 Heatsink for IC. 504300
MP-353 Heatsink for 2SC1307A. 494251
MP-354 Pleatsink for 2SC1307 B. 494252
MP-211 Meter Lamp Reflection Plate. 484063
MP-111 Call Switch Contact. 484086
MP-112 Call Switch Spring. 484087
MP-307 Knob for Delta tune Control. 494199
MP-117 Knob for Channel Selector. 484116
MP-17 Knob for Vol./squ. Control. 474011
MP-118 Nut for Channel Selector. 484073
MP-120 Screw for Mounting Bracket. 484098
Channel Indicator Plate 514372
MP-356 Heatsink for 2SC496 (2SC1957) 494250
MP-19 Call Button. 484057
MP-5 Mounting Bracket for Speaker. 504335
MP-109 Mic Jack Mounting Supporter. 484056
MP-500 PLL. Unit Co er (Upper) 524376
MP-501 PLL Unit Co er (Lower) .. 524386

PARTS LIST for TS-680DX
DESIGNATION PARTS NAME PARTS NO.
ICI Integrated Circuit. TA-72OOP
IC2 Integrated Circuit. TA-7205P
IC3 Integrated Circuit. TC-9100P
IC4 Integrated Circuit. TBA-120
TRI FET. 3SK-40
TR7 FET. 2SK-30
TR2,3,4,5,11,12,15 Transistor. 2SC-1675
TR 6,14 Transistor. 2SC-945
TR8 Transistor. 2SC-1096
TRIO Transistor. 2SC-496
TR16 Transistor. 2SC-2086
TR17 Transistor. 2SC-1957
TR18 Transistor. 2SC-1307
T R19, 22, 23,24 Transistor. 2SC-1739
TR20, 21 Transistor. 2SC-1741
TR9 Transistor. 2SA-634
TR13 Transistor. 2SA-562
SCR SCR. 2SF-656
DI-14,18,20-24,30 Silicon Diode. 1S 2473
D15,16,17 Silicon Diode. 1N4002
D25 Varicap Diode 1S 2689
D29 Varicap Diode. 1S1658
D26 Zener Diode. WZ-060
D19, 27 Zener Diode. WZ-070
D10, 28 Zener Diode. WZ-080
CF Ceramic Filter. CFU-455H
J2 Ext Speaker Jack. SJ-296
J1 Antenna Jack. MRM/INCH
J3 Microphone Jack. DIN Type 7p. CS279
— 14

PARTS LIST for T'~ 680DX
DESIGNATION PARTS NAME PARTS NO.
VR1, 3 Semi Variable Resistor 100K ohm. SVR100K S2
VR2 Semi Variable Resistor 10K ohm. SVR010K S2
VR6, 7 Semi Variable Resistor 100K ohm. SVR100K S3
VR9 Semi Variable Resistor 5K ohm. SVR005K S3
VR5 Variable Resistor (Volume) 50K ohm. VR1650KB
VR4 Variable Resistor (Squelch) 10K ohm. VR16 10K BS
VR8 Variable Resistor (D Tune)10K ohm. VR1310K BS
T l, 2 RXRF Tuning Coil. 089-905
ТЗ, 4 IFT 10.7 MHz 089-901
T5 IFT 455 KHz 089-902
Тб IFT 455 KHz 087-102
Т7 IFT 455KHz 145-101
Т8 Modulation Trans. TS-660
Т9 Power Filter Trans. El-24
Т10,11 TX Mixer Coil. 087-904
Т12 TX 27MHZ Filter Coil. 231-801
Т13 TX 27MHZ Buffer Tuning Coil. 005-904
Т14 10.24 MHZ OSC Coil. 231-002
Т15 PLL VCO Coil. 231-001
Т16 VCO AMP Coil. 231-003
L1, 4 TX Power Choke. 010-907
L2 TX Dri er Tuning Coil. 0Q5-906
L3 TX Final Choke Coil. 005-901
L5 TX Final Tuning Coil. 005-907
L6 TX к Matching Coil. 145-903
L7 TX n Matching Coil. 145-902
F1 Fuse 5A F-5A
МMeter 510052
SP Speaker 77P-06
PL1—4 Pi rot Lomp 14V-80mA PL-14-80
SW3, 6 Toggle Switch 8A-2021
SW4 PLL Rotary Switch SRH-101U
MIC. Microphone Complété 22-256-28
15