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Post subject: 50 week of 1969 Fender Super Reverb Cap Question
Posted: Mon Sep 19, 2011 1:14 pm
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I have a late 69 SR and it has sat for many many years, fired up about a year and a half ago it was a little weak and the reverb did not work with a new reverb tank, yes is is the correct one I switched out tubes for known good ones still did not work the vibrato does work. I will address that problem at a later date. Before I fire it back up I think I will change the filter caps, When I opened up the hatch I saw 3 Malory originals and 2 Japan 100 UF 350 VDC, so I am going to replace all 5. My first question is do I use Sprague Atom 80UF 350 VDC or 100UF 350 VDC and then the 3x 20UF 500 VDC. My second question is what else should I change before I turn it back on.


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Post subject: Re: 50 week of 1969 Fender Super Reverb Cap Question
Posted: Mon Sep 19, 2011 3:33 pm
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According to the schematic, the smaller values should actually be 70mfd so I'd go with the 80's......

http://web.archive.org/web/200708200735 ... _schem.pdf

As well, the caps for the B+ should be rated for 525vdc.

I'd also replace the bypass and bias caps as well (note the polarity of the bias cap).

HTH

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject: Re: 50 week of 1969 Fender Super Reverb Cap Question
Posted: Tue Sep 20, 2011 4:03 pm
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80uF@450vdc and 20uF@500vdc are the Sprague Atom capacitor values can you suggest another brand that has 525 VDC or will the 500vdc work


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Post subject: Re: 50 week of 1969 Fender Super Reverb Cap Question
Posted: Tue Sep 20, 2011 6:06 pm
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I believe F&T offers the voltage rating you need. They have electrolytics that can accommodate 600vdc.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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