In Reply to: RE: There you go again.......... posted by tube wrangler on June 2, 2012 at 11:03:01:
"(1) Conventional tube amplifier technique chooses cathode bypass caps by their Micro-Farad values. I choose them according to measured and listened performance under actual musically driven conditions."
The value necessary to fully bypass the cathode is a matter of math. The value you have chosen does not fully bypass the cathode. This make your amplifier, to use your word, "perverted". Not only will the frequency response be "off", the phase response will be off as well.
(2) A high impedance driver is not a problem in this design because the HI-MU driver chosen is far more than capable of driving any good 2A3 vacuum tube way beyond the levels that this design requires."
The high impedance driver is, by your own admission, a problem. You said it "starts to roll off at 15kHz". This makes your amplifier, to use your own word, "perverted". Not only will the frequency response be "off", the phase response will be off as well.
I didn't say anything about a three stage amplifier. Most of the rest of your post is a good example of you not addressing the questions and going off talking about other things.
You have done it again.
I didn't/don't assume anything. If the driver is not/can not fully drive the Miller that's a problem no matter what the rest of the circuit looks like.
If the cathodes are not fully bypassed that's a problem no matter what the rest of the circuit looks like.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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Follow Ups
- RE: There you go again.......... - Tre' 15:31:18 06/02/12 (9)
- RE: There you go again.......... - tube wrangler 16:08:16 06/02/12 (8)
- RE: There you go again.......... - Tre' 21:14:59 06/02/12 (2)
- RE: There you go again.......... - tube wrangler 21:52:17 06/02/12 (0)
- RE: There you go again.......... - tube wrangler 21:46:18 06/02/12 (0)
- RE: There you go again.......... - Tre' 17:17:26 06/02/12 (4)
- RE: There you go again.......... - tube wrangler 21:45:17 06/02/12 (3)
- RE: There you go again.......... - Tre' 07:13:13 06/03/12 (2)
- RE: There you go again.......... - RPMac 13:21:14 06/03/12 (1)
- RE: There you go again.......... - Tre' 19:16:46 06/03/12 (0)