Pelliott321 wrote:
Dave I would be interested in more info about the 6C45P transformer coupled spud amp
Paul,
Very simple circuit. But been a while since I put it together. I used a pair of custom wound Electroprint line output transformers, 3K:600ohm that I had from a preamp project. Just a simple grounded cathode circuit, with LED bias (though I might have replaced that with SiC diode bias, have to check). Running around 30 mA through the tube. Carbon comp grid stoppers (x2) cathode stoppers (x4) and plate stoppers. Used shunt regulators on each tube, consisting of a 0D3 voltage regulator fed by a DN2540 cascode current source (150V). Power supply uses tube rectifier to choke input supply, filter caps are all motor run (oil), with Russian teflon bypasses. Goldpoint attenuator for a volume control.
I will have to trace out what I did and write out a schematic.
David