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In Reply to: RE: WANTED: Futterman H3 OTL project - Harvard Electronics or Tech Instruments posted by unlisted on July 01, 2022 at 13:45:55
since you have had one of the original capacitors fail it would be a good idea to put all new ones in, as well as the ones on the board.
https://www.ebay.com/itm/123867313130
use 6 of these per amp, 4 for power supply and 2 for the speaker bank, the amount of capacitance will be very close to the original configuration.
these are photo capacitors with the same voltage as the Rubicon's that were stock.
I have used new computer grade capacitors in a few of the rebuilds I did,
but personally I think the new Photo Flash are the way to go.
Follow Ups:
when you put the new tubes in did you re-align the amp?
If not then that is probably the reason the capacitor failed.
page 2
Thank you for the links and especially the two pages from Mr Hammand. I haven't seen those before.
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