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PostPosted: Tue Feb 23, 2016 9:45 am 
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Mark II

Joined: Thu May 05, 2011 9:55 pm
Posts: 54
Hey all, I think my Blue Angel may need to be re-capped.
I'm not sure of course but the amp is roughly 20 years old and it started having problems (read below for a description).

What bothers me is the cost of Atom caps! Why, oh why do these things cost $15-20 and availability of 30 uF is so scarce? This amp needs 8 of the bloody things!!

The problem:
I'll try to spare all the details, but I'm experiencing an intermittent drop in volume. It could be tubes but I have tried different rectifier and power tubes and even brought the amp to a tech. He only saw an arcing at the power switch which caused a resistor to cook, thus affecting its value so he replaced it along with a nearby diode. He ran the amp all day and volume never faded out.

I don't know for sure that he's a really good tech, but he didn't find anything else necessarily except to point out that I have low gain on my RCA 6V6s and I shouldn't use a 5Y3. I thought I was getting more sag out of it vs a GZ34 but read somewhere that Class A amps do not get affected by rectifier sag?

At the moment I am not sure if the problem is gone yet because it's intermittent and I have only had a couple hours on the amp. Note that I live in Canada so there's no way I'm going to send it back to Mesa.

Anyway, would love your input guys, even if it's to source cheaper filter caps! Thx


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PostPosted: Tue Feb 23, 2016 9:54 pm 
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Mark II

Joined: Sun Nov 03, 2013 12:39 am
Posts: 54
Location: Bay Area, CA
https://www.tubesandmore.com/products/C-SA

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Maverick 2x12 | Blue Angel 2x10 | Flux Drive | G&L ASAT Classic | Fender '68 Reissue Strat | EBMM Luke


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PostPosted: Wed Feb 24, 2016 3:49 pm 
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Mark II

Joined: Thu May 05, 2011 9:55 pm
Posts: 54
Thanks Henry, that's probably as good a price as I'm going to find!


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