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Messages - hewo

#1
Is there suppose to be measureable dc one volt onto 8ohm spkr using ecg121 as direct subst for factory transistor called ds-503. ?
#2
General Discussion / Re: Delco Radio
May 30, 2015, 12:11:51 PM
Quote from: DavidS on July 07, 2012, 11:19:42 AM
Is it an AM radio - 91APB1 ? 

Do you have any soldering experience and want to see if you can fix it yourself?

Mine hadn't worked for 37 years.  I replaced the dried out electrolytic capacitors and it fired right up.  Sam's photofacts has the schematic.

If not, there is a restoration recommendation thread here: http://www.camaros.org/forum/index.php?topic=9018.0


The germanium transistor ds-503 tests okay in the b&k transistor tester but leakage appears dangerously present. So I ebay'd sylvania ecg121 replcmnt, hasn't arrived yet. Anyone recognize ds-503 leakage as an inherent design flaw thus requiring periodic replcmnt? It runs full throttle called class A regardless of music demand