This is why test equipment such as a scope and signal generator

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Single Ended Triodes (SETs), the ultimate tube lovers dream.

Posted by Michael Samra (D) on August 5, 2016 at 02:57:46

In Reply to: conjunctive filtering posted by dcal40@aol.com on July 30, 2016 at 12:21:45:

and distortion analyzer is so invaluable in this case.If you think about harshness and what is really,its more or less a higher distortion product in the higher frequency ranges or an exaggeration in the sonic curve in the upper ranges.

You mentioned this amp was a pentode but wired as a triode.If the amp was designed as a pentode and you wired the tube as a triode by adding the resistor between pins 3 and 4 of the EL34,you now effectively lowered the plate resistance of the EL34 and assuming you did that,you may have to recalibrate the circuit values especially if you used global NFB.
This is where a sweep of the amplifier would tell you what has changed and where..This assuming that the amp had a nice flat response as a pentode in its original form.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

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Follow Ups Full Thread

Topic - conjunctive filtering - dcal40@aol.com 12:21:45 07/30/16 (12)

This is why test equipment such as a scope and signal generator - Michael Samra 02:57:46 08/05/16 (1)

RE: This is why test equipment such as a scope and signal generator - Hornlover 08:50:49 08/05/16 (0)

There's an online calculator for everything - kyle 08:18:42 08/03/16 (1)

RE: There's an online calculator for everything - Lenin 08:03:43 08/04/16 (0)

RE: conjunctive filtering - Frihed89 00:22:10 08/01/16 (7)

RE: conjunctive filtering - dcal40@aol.com 10:58:40 08/01/16 (6)

Common for guitar amps. - Chip647 05:26:36 08/03/16 (1)

RE: Common for guitar amps. - Michael Samra 01:52:24 08/05/16 (0)

RE: conjunctive filtering - Lenin 00:48:02 08/02/16 (0)

RE: conjunctive filtering - Paul Joppa 13:02:38 08/01/16 (2)

RE: conjunctive filtering - dcal40@aol.com 16:08:16 08/01/16 (1)

taming "ragged frequency response" - Frihed89 00:01:54 08/02/16 (0)

Follow Ups

This is why test equipment such as a scope and signal generator - Michael Samra 02:57:46 08/05/16 (1)

RE: This is why test equipment such as a scope and signal generator - Hornlover 08:50:49 08/05/16 (0)

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