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RE: DIY PPP 6V6 Amp

Posted by drlowmu on January 11, 2017 at 20:19:31:
Cease and desist. I think your lay-out is in need of great improvement.
That needs to be a dual mono amp. Existing chassis is really too small. All the fields from the iron will be interfering and interacting between themselves, and with everything else in the amp.
Are those ST-shaped tubes your rectifiers?? If so, WHY are they on either side of the amp ???? Form follows function. Fix that.
A 5V3A is a nice sounding DIRECTLY heated rectifier, but it will raise the B+ VDC versus other rectifiers, so PSUD that out. If it does raise it above what you prefer, look into using a new Electro Harmonics 5U4GB, another directly heated rectifier tube, available for $13.50 from Antique Electronic Supple in AZ. I plan to order some soon from them.
Once you build dual mono, or better yet, true monoblocks, you will NEVER build a shared supply amp again ! Why ?? There is a clarity obtainable with a non-shared supply, that you will NOT hear / obtain, through any other lesser means. Do not waste your time and waste your life using shared supply power amps!! Do it RIGHT !!
The RCA input jack needs to be located within 2 inches of the grid of the input tube.
Re-do the chassis, re-do the lay out, keep the same tube complement.
From my early stock market, / stock-broker days, I learned this - sometimes your first loss is your best loss !!
Have fun, I certainly sure am. Best wishes.
Jeff Medwin