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Only side band receiver no am on 148GTL - Televison & Video

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Radio works on SSB but not AM?

Question here is it loss of transmit only on AM Receive?

If receive is good but no transmit on AM---I can tell you what transistor is bad

SD TECH

Posted on Sep 28, 2010

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My radio 148gtl d has low modulation


The Modulation adjustment is VR5, or you can cut D9, though I do not recommend completely disabling the AMC circuit. If VR5 does not have enough range, lift the banded end of D9 & solder a 1K-ohm resistor in series with the diode, then adjust for 100% modulation or to where the AMC circuit just starts to limit modulation.

Mar 04, 2014 | Cobra 148GTL AM/Single Sideband CB Radio -...

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Need Cobra 148GTL with Cobra HG M75 pin-out color code


1audio. 1red
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Hope this helps

Jul 03, 2012 | Cobra 148 GTL 120-Channels Base CB Radio

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Where can i find a service manual for a cobra 148gtl/ex citizens band radio?


Contact the cb shop @ 317 426 9649 They have copies of manuals for pdf type formats..

Aug 15, 2010 | Cobra 148 GTL 120-Channels Base CB Radio

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I have a phillipinnes made 148gtl at first transmit would wok intermittantly ,now if you let radio warm up it might work one time , recieve is ok i suspect it is not sending a carrier


there are 2 finals in this radio. one for side band, and one for AM. So if it works okay on side band, and not at all for AM, then the final for the AM side is bad. Replace it.

Nov 16, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Cobra 148GTL can't TX on USB


Its the cap that feeds the first transistor to the first of the finals. It is either shorted or burned out.

Or the audio IC. It could be putting just enough out on AM to seem like its working, and then not enough for side band.

look at the caps near the finals. Look for a burn one, or one that could be twisted, or shorted in any way.

May 01, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

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