D. Try a different location on your car (keeping in mind the radiation pattern
youwish).
E. Is the antenna perfectly vertical?
F. Try a different location in your neighbortiood. Stay away from large metal
objęcts when adjusting (metal téléphoné or light posts, fences, etc.)
------------------------------------------ NOTE----------- :-------------------------------
The COBRA 148GTL-DX will operate into an SWR o f 2 to 1 indefmite-
ly and sustain an SWR o f 20:1 for a maximum of 5 minutes at rated
operating conditions.
BASE STATION OPERATION
(Operating from 120V AC House Current)
To operate your transceiver from your home or office, using the regulär
house current as the power source, you will require the DYNASCAN Model CA-
20 Power-Pak which has been specially designed for the purpose. It is
available as optional equipment from your dealer. It consists of a precision-built
AC-DC power Converter that delivers the required power for the operation of the
transceiver. The CA-20 operates from any 120-volt, 60 Hz power source. Simply
connect the red (+) and black (-) leads of the transceiver to the, corresponding
terminais of the CA-20.
---------------------------------------- NOTE----- ------------------------------------
Do not attempt to operate. this transceiver by connecting directly to
120 volts AC.
When the CA-20 Power-Pak is used with the transceiver for base station
operation, any Citizens Band beam, dipole, ground plane or vertical antenna may
be used. A ground plane vertical antenna will provide the most uniform horizon
tal coverage.
Extemal Speaker
The extemal speaker jack (EXT. SPK.) on the rear panel is used"for remote
receiver monitoring. The external speaker should have 8 ohms impédance and be
able to handle at least 4 watts. When the external speaker is plugged in, the
internal speaker is disconnected.
CW KEY
This jack is for Morse code operation; To operate, connect a CW Key to this
jack and place the CW/FM/AM/USB/LSB switch in the CWposition.
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11
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Summary of Contents for 148GTL-DX
Page 32: ...со SO AOJ VR2 BLOCK DI AGRAM ...
Page 33: ...SCHEMATIC DIAGRAM ...
Page 41: ...Parts Layout Top View Î37 2SB525C 1 4 1 5 ...
Page 42: ...PARTS LAYOUT Top View ...
Page 43: ...ADDED PARTS MAIN PCB Bottom View PC 879AB ...
Page 44: ...COPPER PATTERN SWR PCB CH SW PCB LED PCB CD ...
Page 48: ...го w INTERNAL DIAGRAM IC s MB87I9 ...
Page 49: ...INTERNAL DIAGRAM IC s го А ...
Page 50: ...INTERNAL DIAGRAM IC s S 0 4 2 P 25 ...
Page 58: ...со го BLOCK DI AGRAM ...
Page 59: ...PB OIO SCHEMATIC DIAGRAM ...
Page 60: ...WiRING DIAGRAM 3 5 3 6 P C 881 P C 8 8 0 ...
Page 66: ...COPPER PATTERN MAIN PCB ...
Page 68: ...P B O I O ADDED PARTS MAIN PCB H fs il 8 46 ...
Page 70: ...COPPER PATTERN SUB ASSY PCB s ...
Page 71: ...PARTS LAYOUT MIC JACK 49 ...
Page 74: ...INTERNAL DIAGRAM IC s MC14008B 1 4 Cou l 13 S 4 13 S 3 11 S2 10 S 1 16 15 14 13 12 11 10 9 52 ...
Page 75: ...сл С О INTERNAL DIAGRAM IC s OSC out Г 2 out FS PO PI P2 P3 PA P5 P6 P7 P8 MC145106 ...
Page 76: ...INTERNAL DIAGRAM IC s 14 0UT4 13 I N 4 12 lN 4 11 VEE 10 IN 3 9 I N 3 8 0UT3 TA75902P 54 ...