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 Post subject: It's not just PG amps that have leaky cap issues...
PostPosted: Sat Feb 28, 2015 11:44 pm 

Joined: Sun Mar 31, 2013 11:55 am
Posts: 1818
Location: So cal
So I got a zapco 750.2 that I opened before powering up, and it's a good thing I did. Not sure all of it is from leaking caps, looks like they might have put down a silicone type of material, but it did come up yellowish and the caps did leak for sure.

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Not sure I'd want to change out those gate resistors.



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 Post subject: Re: It's not just PG amps that have leaky cap issues...
PostPosted: Sun Mar 01, 2015 12:13 am 

Joined: Sun May 06, 2012 8:01 am
Posts: 1652
I could of told you that, lol....jk. Yeah I've repaired several old school Zapco's with leaky caps, some were exactly the same as the PG's (Panasonics HFZ/HF). Some are damaged pretty bad (certain Zapco's have multilayer boards so the traces and via's that get damage are no so easy to repair). Same goes with some Zeff amps, they leaked so bad that the traces got ate up so no fire there...just protect or straight DC on the outputs.


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 Post subject: Re: It's not just PG amps that have leaky cap issues...
PostPosted: Sun Mar 01, 2015 3:38 am 
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Joined: Mon May 04, 2009 3:37 am
Posts: 1318
Location: Virginia, Near D.C.
Well thats a good pointer guys! Ive been interested in trying zapcos



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 Post subject: Re: It's not just PG amps that have leaky cap issues...
PostPosted: Sun Mar 01, 2015 6:01 am 

Joined: Sun Mar 31, 2013 11:55 am
Posts: 1818
Location: So cal
I'm lucky there wasn't any damage to the board.

I'll have the zapco I'm working on available for sale probably by next weekend if your looking to,try a zapco soon. I'm excited to hear this thing, it should be pretty nice sounding.



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 Post subject: Re: It's not just PG amps that have leaky cap issues...
PostPosted: Sat Mar 21, 2020 12:58 pm 

Joined: Wed Nov 11, 2009 5:16 pm
Posts: 57
Well this is an old thread but I have a collection of amps with problems caps being 1. Been running zapco amps for years now mostly the reference amps made in usa and havent had a cap issue was that later built reference built overseas? The good ones had gold plated terminals and were black with the AG style angled fins. I also had a Xtant 1000.1 D almost catch my BMW Touring wagon on fire on the tollway tunes cranked sounding good and a pop and one of the caps popped and smoke was pouring out about had to change my underwear after that turned it off just in time and was lucky it wasnt A main rail cap didnt even burn the board but still need repair. I do have a zapco 1000.4 that has front left channel starts distorting after it warms up been trying to get this stuff to trickey rickey. I have done some recaps on a M44 and my old MS250 with good results but Im limited. Waiting for the pandemic to blow over and maybe do some horse trading for repairs. Got 3 ZPA 5.0 in varios repair stages that got to be beyond me. By the way the zapco amps are the only thing I have found that holds a candle to the old PG stuff only issue with the reference amps is the terminals and limited ohlm loads when bridged for subs.


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