Posted by Damir [ 213.202.85.53 ] on September 04, 2005 at 18:59:52:

In Reply to: Fisher 500C-how hot is too hot? posted by hurdy_gurdyman on September 04, 2005 at 08:22:40:

With OP - Ua=440V, Ug2=320V, Ug1=-20V, you can expect more then 100mA Ia+g2 current through each EL34. Much more then Pa max for EL34. For "resonable" bias of about Ia~50mA (and Ig2~5mA) you should change the "bias voltage" Ug1 to about -26V. If you don`t have adjustable "bias" pot, you can change the values of voltage divider resistors in "bias" supply to "enlarge" Ug1.

Replies:

• Re: Fisher 500C-how hot is too hot? - metasonix 14:07:20 09/05/05 (11)
  • New day, more tinkering, new results - hurdy_gurdyman 13:47:23 09/07/05 (6)
    • Re: New day, more tinkering, new results - Damir 14:23:20 09/07/05 (5)
      • Re: New day, more tinkering, new results - hurdy_gurdyman 15:42:45 09/07/05 (4)
        • Hmm... - Damir 00:46:02 09/08/05 (3)
          • Re: Hmm... - hurdy_gurdyman 08:20:57 09/08/05 (2)
            • actually... - hurdy_gurdyman 08:38:10 09/08/05 (1)
              • Re: actually... - hurdy_gurdyman 10:14:34 09/08/05 (0)
  • Re: Fisher 500C-how hot is too hot? - hurdy_gurdyman 16:32:13 09/05/05 (3)
    • Re: Fisher 500C-how hot is too hot? - hurdy_gurdyman 22:03:42 09/06/05 (2)
      • oops - hurdy_gurdyman 23:01:41 09/06/05 (1)
        • Re: oops - Russellc 12:23:05 09/07/05 (0)
• Re: Fisher 500C-how hot is too hot? - hurdy_gurdyman 22:52:04 09/04/05 (3)
  • Re: Fisher 500C-how hot is too hot? - Damir 06:43:48 09/05/05 (2)
    • Re: Fisher 500C-how hot is too hot? - hurdy_gurdyman 10:45:56 09/05/05 (1)
      • Re: Fisher 500C-how hot is too hot? - Damir 12:32:51 09/05/05 (0)