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OTL Asylum OTL, Output Transformerless Amplifier User Group. |
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OTL Asylum OTL, Output Transformerless Amplifier User Group. |
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In Reply to: Sounds like an oscillation. posted by Ralph on June 4, 2020 at 10:27:49:
As you know, there are 3200V lurking at the outputs of this amplifier. Consequently, when I have it on my benchtop, I am running it unloaded. It exhibits no abnormalities in that mode. DC voltages are all stable and as expected. To go anywhere near the outputs with any of my oscilloscope probes would be not wise, as I am sure you know. Do you know any tricks whereby I could detect oscillations without a 'scope? I do use a 6000V probe when I measure DCV with my Fluke. I was thinking I might use that probe and look at ACV magnitude only, on the benchtop. Was thinking of making a dummy speaker load using 3000pF HV capacitors; the speaker measures as two 3000pF capacitors in series, with the screen as center tap.
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Follow Ups
- Can't - Lew 06/4/2011:21:01 06/4/20 (4)
- If you're gonna play around with that stuff - Ralph 13:16:14 06/4/20 (3)
- Thanks and a further thought.. - Lew 08:04:38 06/5/20 (2)
- RE: Thanks and a further thought.. - Ralph 08:34:57 06/5/20 (1)
- RE: Thanks and a further thought.. - Lew 13:19:38 06/5/20 (0)
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