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In Reply to: Bypassing Rk1 posted by Lew on March 1, 2015 at 13:49:56:
"Years ago there was an article in Glass Audio that made a strong argument for NOT bypassing Rk1 (Rk on the lower valve section), having to do with equalizing current flow through both top and bottom halves of the SRPP."
Bingo! I've just tried it in the simulation, and that makes a huge difference, in the case when the load is tuned to the value that balances the antiphase currents in the two tubes. It looks like the 2nd harmonic can now become highly suppressed (80 or 90 dB down on the fundamental) if the load is tuned carefully enough. Of course this may be unrealistically good, since the simulation is a bit idealistic, but nonetheless it does show that there is a cancellation phenomenon now.
But it does, however, depend crucially on have the load impedance exactly right. I'll play around a bit more...
Chris
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Follow Ups
- RE: Bypassing Rk1 - cpotl 14:28:44 03/01/15 (3)
- RE: Bypassing Rk1 - Lew 07:57:51 03/02/15 (0)
- RE: Bypassing Rk1 - Naz 05:32:57 03/02/15 (1)
- RE: Bypassing Rk1 - cpotl 05:56:15 03/02/15 (0)
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