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Old July 31st 06, 06:10 PM posted to rec.radio.cb
Peter Peter is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 26
Default galaxy 2527 dx modulation problem

"Dave" wrote...

Hello slow code,
Well, when I asked for some help, I did not expect snyde
remarks.


You don't know the group well, do you?

I thought perhaps someone in here could shed some light on the
problem that I was having,



Audio ICs can get warm, but I assume you have abnormal temperatures. Overheating
audio ICs can start to act in strange ways, so it could explain the distortion.
It is important that, while you have this problem, you do not run the set for too
long. Even if the heat does not instantly pop the IC, high temperatures will
shorten it's life or destroy it over time.

First of all, I would check the supply voltage to that IC.
If that is fine, I would consider the possibility of a leaky electrolytic capacitor
around the IC, possibly the capacitor blocking DC on the output.
The voltage on the output pin of the typical CB audio IC should be about
1/2 the supply, and there should be no DC across the speaker. You could
plug a jack into an external speaker socket and look for a voltage across
the pins.


I hope this is a little more helpful.


Regards,

Peter.
http://www.citizensband.radiouk.com/