In Reply to: RE: What tubes to use with this Interstage Transformers? posted by Tre' on September 1, 2016 at 09:08:36:
Tre,
I agree the Cmiller is something to watch out for in all Triode circuits. It effects the Frequency roll off and the the previous driver stage driver capabilities.
But I think you meant the current in the primary needs to be able to supply 4 the load current of the Secondary.
So theoretically speaking, 20mA at 100Vrms (2W) driving power requires a little more than 25Vrms of 80mA of the power applied to the IT primary. So in the case of 801A, 70Vp-p (or 100Vp-p) with 80mA of current should be about 1.6W of power. But it doesn't sound very right, right?
So, I am looking at a little more than 150Vp-p with 40mA of driving AC current for about 600Vp-p with 10mA Grid current into the Output tube? I think this sound much realistic. 150Vp-p through 1:4 will be enough to compensate for the Cmiller from the Output tube.
Regards,
James
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.Thou shall not stand where I type for I carry a bottle of Certified Audiophile Air and a Pure Silver Whip.
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Follow Ups
- RE: What tubes to use with this Interstage Transformers? - megasat16 20:58:28 09/01/16 (14)
- RE: What tubes to use with this Interstage Transformers? - Tre' 19:25:28 09/02/16 (13)
- RE: What tubes to use with this Interstage Transformers? - megasat16 23:30:32 09/02/16 (12)
- RE: What tubes to use with this Interstage Transformers? - Tre' 14:33:06 09/03/16 (11)
- RE: What tubes to use with this Interstage Transformers? - megasat16 21:06:47 09/03/16 (10)
- RE: What tubes to use with this Interstage Transformers? - Tre' 08:23:25 09/04/16 (7)
- RE: What tubes to use with this Interstage Transformers? - megasat16 11:01:07 09/04/16 (6)
- RE: What tubes to use with this Interstage Transformers? - Tre' 11:35:43 09/04/16 (5)
- RE: What tubes to use with this Interstage Transformers? - megasat16 11:55:43 09/04/16 (4)
- RE: What tubes to use with this Interstage Transformers? - megasat16 12:32:40 09/04/16 (2)
- RE: What tubes to use with this Interstage Transformers? - Tre' 12:38:39 09/04/16 (1)
- RE: What tubes to use with this Interstage Transformers? - megasat16 12:59:49 09/04/16 (0)
- RE: What tubes to use with this Interstage Transformers? - Tre' 12:32:10 09/04/16 (0)
- RE: What tubes to use with this Interstage Transformers? - Lenin 01:20:27 09/04/16 (1)
- RE: What tubes to use with this Interstage Transformers? - megasat16 11:29:04 09/04/16 (0)