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MagneQuest/Peerless Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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MagneQuest/Peerless Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: Re: EXO-173 progress posted by keto on May 11, 2004 at 15:53:44:
Hey-Hey!!!,
The DHT amp I have on the boards will run 300B's but much else is similar. Two filament windings, a hum pot on each cathode and a current sensing resistor from wiper to ground. Say ten Ohms or so. Fixed bias, supplied through the split CT, PP grid choke, to each power valve.5687 input tube, configured as a common cathode diff amp, feeding a PP, common cathode diff amp of two 12B4A's, loaded reisitively, and feeding the ends ov the grid choke the AC signal.
regards,
Douglasoh yes, MQ-431 output Iron, Hammond 300BX power Iron, with the 10 Hy/500 mA choke, configured as a choke input supply, B+ in the conservative 310-320 V range for 80 mA per valve. CCS-es by DN2540
Edits: 08/01/20 08/01/20 08/01/20 08/01/20 08/01/20 08/02/20 08/02/20 08/02/20 08/02/20 08/02/20 08/02/20 08/02/20 08/02/20 08/02/20
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Follow Ups
- progress - Sector-7G 17:17:47 05/11/04 (2)
- yet another comment on filament windings - keto 22:16:05 05/15/04 (1)
- it's just a sack of bits now - Sector-7G 03:49:15 05/16/04 (0)
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