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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: feedback/balance control on a Magnavox pp el84 posted by DAK on May 7, 2014 at 12:24:04:
Replace the (750 Ohm) pot with two 390 Ohm resistors to ground - this will give the proper amount of feedback. Low frequency oscillation (motorboating) is a result of low-frequency phase shift and too much feedback.
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Follow Ups
- RE: feedback/balance control on a Magnavox pp el84 - Tom Bavis 05/7/1413:34:41 05/7/14 (5)
- RE: replacing pot with resistors - DAK 18:47:48 05/8/14 (1)
- If you have not done so already... - JJ Triode 22:07:33 05/8/14 (0)
- I believe Tom is correct... - JJ Triode 20:23:45 05/7/14 (1)
- RE: I believe Tom is correct... - DAK 16:46:53 05/9/14 (0)
- RE: feedback/balance control on a Magnavox pp el84 - DAK 18:57:33 05/7/14 (0)
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