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In Reply to: RE: audio porn posted by Sidewinder on June 20, 2015 at 09:29:27
well ... xover. I am using a Beringher CX2310 to drive a VT52 differential amp (IT transformer, tamuras) and a 801A spud amp. Midbass and mid/high crossed with 6dB/oct, so just a cap, inductor and a handful of resistors to attenuate 3dB the 4001
Follow Ups:
Hello gluca
Do you find the 801a spud (single gain stage? or with input step up transformer?) to have enough gain for the horns?
I like the 393As' glow, beautiful. Are you using the grids as plate? Can you share a schematic of your PS/amp?
Thanks,
David
Hi David
Yes, grid as plate. PSU is a mixed bridge (393A + Schottky diodes) into a LC filter followed by a CCS + C. Final voltage is 500V, the tube will set its plate voltage and the CCS is dropping 20V or so.
Gapped 16k output transformer and zeners under the 801A. Input step-up transformers removed but a (big) 1:4 or 1:8 would work there.
I am using LC filter + Rod Coleman's regulators to heat the 80A's. Amp is dead quite.
I googled but I could not find an updated schematic, sorry.
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