Posted by Tnuctipun [ 64.12.116.65 ] on March 08, 2005 at 11:42:37:

Given the wide variatin in grid circuit requirements between power valves like 211, 845 and 833 it seems possible to build a pre-amp to drive the cathodes. It also looks like cathode Z is near constant, even when the grid is drawing current....

anybody try this yet?
regards,
Douglas

Replies:

• Yes. - Mark Kelly 19:17:02 03/31/05 (3)
  • Re: Yes. - Tnuctipun 08:21:37 04/01/05 (2)
    • Error and feedback. - Mark Kelly 23:47:17 04/01/05 (1)
      • Re: Error and feedback. - Tnuctipun 09:18:34 04/02/05 (0)
• Re: Cathode drive - Steve 20:30:44 03/09/05 (3)
  • Re: Cathode drive - Tnuctipun 07:27:25 03/10/05 (2)
    • Re: Cathode drive - steve 21:17:03 06/01/05 (0)
    • Re: Cathode drive - steve 12:55:54 03/10/05 (0)
• Re: Cathode drive - Steve 20:17:04 03/09/05 (0)