fmbjogger

Have a " WonderBar" radio in my '67 98. Radio turns on with good reception then fades in/out ( parked and in gear). What's the problem ?

oldcutlass

Check the ground on your antenna and radio.

Lady72nRob71

X2.
Good time to check body and chassis ground straps also.

MDchanic

Could be a bad output transistor.

If you check it out out on the bench and it still does it, you can try spaying the transistors with Dust-Off or similar stuff, one at a time, to see if cooling one down makes it stop.
[sarcasm]Then it's just a simple task of finding a replacement [/sarcasm] and soldering it in.

- Eric

Lady72nRob71

Post a macro photo of the transistor and I will see if I can come up with anything in my vast array of parts sources.

Yellowstatue

The O/P transistor is DS 501....is your radio an AM or AM/FM??

fmbjogger

It was a grounding problem. Gronded the radio and no fade. Thanks to all for the help !

oldcutlass

Glad to hear the that the problem was a simple fix!!

MDchanic

Too easy.

- Eric