RE: Suggestion for a triode, about 20mA, gain about 20?

Posted by GeorgePope (A) on June 12, 2020 at 11:29:02

In Reply to: Suggestion for a triode, about 20mA, gain about 20? posted by Mike C on May 26, 2020 at 12:38:35:

Many years ago on this forum , when it was a lot more fun , I read posts about using some of the more 'esoteric' thoriated tungsten filament transmitting valves . The easiest to use being the 3C24 . If you can afford the extra real estate and a higher HT with cap-coupling , I would recommend the 3C24 . Thoriated DHT with spiral filament 6.3V 3A , Ra is 15k which means quite a substantial value of plate choke , which will no doubt mean extra HF squirrels added in . CCS loading etc. Anything over about 6mA / 350V gets a bit of colour to the anode . which means the valve is operating correctly and the anode is sucking up any gas . Ra is 15K , mu 20 IMO this is one of the best sounding medium mu voltage gain driver if implemented correctly

Geworge

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Follow Ups Full Thread

Topic - Suggestion for a triode, about 20mA, gain about 20? - Mike C 12:38:35 05/26/20 (22)

RE: Suggestion for a triode, about 20mA, gain about 20? - GeorgePope 11:29:02 06/12/20 (0)

E288CC - PakProtector 19:48:23 06/05/20 (0)

EML 20AM/B - 91derlust 13:25:14 05/28/20 (4)

RE: EML 20AM/B - Mike C 04:15:12 06/02/20 (1)

RE: EML 20AM/B - 91derlust 14:10:04 06/06/20 (0)

EML 20AM/B - $500 pair? - andy evans 01:51:00 05/29/20 (1)

Cost is only one part of the value equation. - 91derlust 00:57:42 05/30/20 (0)

FET + DHT? - andy evans 02:56:24 05/28/20 (3)

RE: FET + DHT? - 91derlust 13:28:55 05/28/20 (0)

RE: FET + DHT? - Mike C 11:27:31 05/28/20 (1)

RE: FET + DHT? - andy evans 12:41:47 05/28/20 (0)

6H30P can be run there - richardl 16:25:42 05/27/20 (1)

RE: 6H30P can be run there - Eli Duttman 22:41:28 05/27/20 (0)

RE: Suggestion for a triode, about 20mA, gain about 20? - Paul Joppa 17:10:27 05/26/20 (4)

RE: Suggestion for a triode, about 20mA, gain about 20? - Mike C 11:41:38 05/28/20 (0)

RE: Suggestion for a triode, about 20mA, gain about 20? - Tre' 18:09:03 05/26/20 (2)

RE: Suggestion for a triode, about 20mA, gain about 20? - Paul Joppa 20:41:09 05/26/20 (1)

got ya, thanks. nt - Tre' 14:53:31 05/27/20 (0)

RE: Suggestion for a triode, about 20mA, gain about 20? - hifipaul 16:37:44 05/26/20 (0)

RE: Suggestion for a triode, about 20mA, gain about 20? - Eli Duttman 14:40:52 05/26/20 (0)

5687....-nt - elblanco 13:15:46 05/26/20 (1)

RE: 5687.. - Mike C 16:46:01 06/01/20 (0)

Follow Ups

RE: Suggestion for a triode, about 20mA, gain about 20? - GeorgePope 11:29:02 06/12/20 (0)

RE: Suggestion for a triode, about 20mA, gain about 20?

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