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In the power supply, at location C12, the schemo has 1000uf, 50v. I currently have a Nichicon HE 2700uf,50v there and it sounds great. I was wondering...I have two Black Gate 1000uf,50v caps. Would paralleling them at C12 work? There is enough trace to drill two holes to fit the 2nd cap and enough room on the board to shoehorn it in. What do you think? I can get a Black Gate FK 2200uf, 63V but the seller is asking an exorbitant price for it. Black Gates are becoming very rare and more expensive. Supposedly the Audio Note owner in England is working with Rubycon to make him a Black Gate equivalent.
The Nichi HE is a very good, low ESR cap and just about perfect for that location, if it were me I'd leave it where it is. Paralleling two smaller caps does have some theoretical advantages, even lower ESR, but in this application, I've not "heard" any improvements when tried on other tuners.
If you want to experiment try a couple of Panasonic FR or FM caps and connect the leads above the board using the existing through holes. That way you don't have to drill the board and you can see, hear, any differences before you start drilling holes .
Just my $.02, oh and I've never heard or experiences any issues in using a BG "N" in a feedback loop.
The Nichicon does sound excellent in that location so I will leave it there for now, especially since you feel that paralleling wouldn't make a difference. I did replace R3 resistor with the Dale wirewound you recommended. The original resistor was still spot on at 91 ohm, but I went ahead and replaced it anyway.
Thanks for all your informative and helpful information.
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