Question about Cobra 148 GTL 120-Channels Base CB Radio

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No modulation in AAM only mode. Needing a schematic.

I have a Cobra 148 GTL New Model BLACK FRONT PANEL, with main board PCB marked "SSB 145106". Have not any schematic for solve a no modulatiun on AM mode. Circuit similar but no equal to 3900. Will thanks any help ! mcastelo@adinet.com.uy (CX9BT)

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If the transmitter produces power output with modulation on SSB but NOT ON AM then the AM Pass Regulator is defective, more times than not.

Posted on Jun 10, 2009

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No AM carrier or modulation. SSB transmits good


what cb is it ? it sounds like your am section is not getting powered up when you switch from ssb to am. If i know the model i may have a diagram of it here and suggest a place to start

May 02, 2007 | Cobra 148 GTL 120-Channels Base CB Radio

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