RE: Optimizing the Feedback Loop

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Posted by Triode_Kingdom (A) on June 21, 2024 at 07:16:02

In Reply to: Optimizing the Feedback Loop posted by JKT on June 20, 2024 at 19:12:49:

Procedures for optimizing feedback loops have been discussed in detail at the AudioKarma site. Adjusting the step network at the input stage is only one method for assuring proper response and stability. A phase advance cap across the feedback resistor is nearly always required, and in some cases, a Zobel must also be applied across the OPT. I haven't used Crowhurst's technique. Rather, I use the amplifier's response to a 10kHz square wave as a general tuning tool. There are various means to also test unconditional stability, including driving the amplifier into capacitive loads. All of this is highly dependent on the quality of the output transformer (which imparts the majority of an amplifier's high frequency phase shift) and the overall circuit configuration.

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Topic - Optimizing the Feedback Loop - JKT 19:12:49 06/20/24 (15)

RE: Optimizing the Feedback Loop - rage 12:35:27 06/21/24 (5)

I was thinking the same thing. Or just use very linear triodes to start with. nt - Tre' 16:19:02 06/21/24 (4)

just use very linear triodes - Triode_Kingdom 09:47:59 06/22/24 (3)

RE: just use very linear triodes - rage 11:56:00 06/24/24 (0)

RE: just use very linear triodes - PakProtector 05:39:02 06/23/24 (0)

Yes - Tre' 10:24:06 06/22/24 (0)

If you are reading Crowhust - Ralph 09:25:57 06/21/24 (6)

RE: If you are reading Crowhust - JKT 21:19:30 06/24/24 (1)

+1 - Ralph 08:42:55 06/25/24 (0)

RE: If you are reading Crowhust - Tre' 15:57:50 06/21/24 (2)

RE: If you are reading Crowhust - Paul Joppa 07:12:35 06/22/24 (1)

Sometimes I'm a little slow to catch on. Thanks Paul. - Tre' 10:25:16 06/22/24 (0)

RE: If you are reading Crowhust - Triode_Kingdom 09:58:14 06/21/24 (0)

RE: Optimizing the Feedback Loop - Triode_Kingdom 07:16:02 06/21/24 (0)

RE: Optimizing the Feedback Loop - trobbins 05:45:42 06/21/24 (0)

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RE: Optimizing the Feedback Loop - Triode_Kingdom 07:16:02 06/21/24 (0)

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