Need help with Cobra 148GTL/EX

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kf2hs
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First Name: peter
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Need help with Cobra 148GTL/EX

Post by kf2hs »

Radio Make and Model: Cobra 148GTL/EX
PCB Number: superstar 3900 board
PLL Number:
Test gear available: basic
Symptoms: In AM recieve is crystal clear. In upper or lower sideband receive is very garbled. Moving clarafier all the way up or down receive becomes barely readable. Transmit am told sounds the same.
All is well in AM.

What is working:

What has been tried: Just some basic voltage tests but I don't have the exact schematic. It seems to be manufactered in the early eighties.

Did it suddenly happen ?: Radio was operating perfectly and then all of a sudden it happened.
Anything else that may be of help?: A friend has a much newer 148 with the same problem
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