[Amps] Alpha 76A Filter Caps?

weaverwf at usermail.com weaverwf at usermail.com
Fri Nov 20 14:15:59 EST 2020

I just went through this with an ‘86 that had been on the shelf for about 15 years. I checked the ESR on the caps and rewired the amp for 120 (I only had a 120V variac) and brought it up over a few days without problem. Back to operation at 240V with no problem. You could go this way (fuse the variac appropriately low) and find out whether you need new caps or not :-). You could get lucky.

Bill WE5P

Comfortably Numb

> On Nov 20, 2020, at 14:10, Gerry Hull <gerry at w1ve.com> wrote:
> Hey All,
> I've got an Alpha 76A which has not been powered up by me in two years,
> and perhaps a few more by the previous owner.
> I was thinking of removing the tubes and bringing up the power slowly using
> a variac to see if
> I can reform the caps.
> Or is it better to simply replace them?
> I've been looking for Caps.  They are not easy to find.
> Would
> https://harbachelectronics.com/shop/misc/cp-206-set-of-six-6-210-%ce%bcf-450vdc-filter-capacitors-with-sems-screws/
> Might these fit in the amplifier?
> Thanks in advance.
> 73,
> Gerry W1VE
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