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Help with Adcom GFA 555

Will2225

Will2225

AK Subscriber
Subscriber
About a month back I recapped the small board on this amp and everything worked perfectly. Today I tried changing out the filter caps with 18,000 100volt caps. I powered it on with a 150 watt bulb in my dim bulb tester. The bulb lights brightly then dims and then starts to get brighter and brighter. I believe I might have a short but I'm not really sure what the problem is.

I accidentally disconnected the led that indicates the power, but I doubt this would be the issue. I double checked the polarity on the filter caps and everything appears correct.

Any advice on how to trouble shoot this?

I bought the caps as part of a kit, and they included many spacers and washers along with the screws. Do I need to use enough spacers to make sure there's room for the resistor and cap underneath?
 
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Hey Will, not an expert here but you might want to recheck your solder joints on those filter caps, also if you happened to unsolder those film caps c06-09 check your new solder joints there too. My GFA-555 is also currently non-op, bought new in 1986. I assume yours is 1st generation? Also you might need to adjust your bias alignment now that you replaced the filter caps.
 
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