In Reply to: Re: thank you posted by eedork on March 16, 2007 at 04:11:41:
>>This is probably in the tube data sheets, but what's a good design point for the screen if the plate is running at 275V?<<Matt,
Zobsky gave you a good hint in mentioning the 6p15p/SV83/EL84N's requirements. 150 V. will do nicely. That puts a 0A2 gas discharge regulator "on the map". If you wire your sockets for the 6p15p, 3 decent and affordable tubes are available for "rolling": the 6p15p, the 6p14p-ev, and the JJ EL84.
In any event, use "fixed", as opposed to cathode, bias on your O/P tubes. IMO, you can't afford the voltage drop across a RC bias network.
BTW, you've yet to indicate the heater current capability of your power trafo. Did your console amp support an external tuner?
Eli D.
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Follow Ups
- Re: thank you - Eli Duttman 16:41:18 03/16/07 (1)
- Re: thank you - eedork 18:49:31 03/16/07 (0)