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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: RE: Preamp with high pitch whine from 1 channel posted by Cpwill on November 2, 2015 at 05:17:20:
Once you've gone through the basics - solder joints, sockets, cleaning etc.
Then you have to look to the circuit. It is actually a very complex power supply with current sources and regulators feeding each channel.
The oscillation is probably caused by one of the other tubes or the associated components. So don't rule out the other tubes. Pay particular attention to the 5651 tube. It is prone to oscillation if it's shunt capacitance is too high. There should be a .02ufd cap on that tube. Any bigger and the tube will oscillate.
Dan Santoni
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Follow Ups
- RE: Preamp with high pitch whine from 1 channel - Blackdog 05:42:30 11/02/15 (2)
- RE: Preamp with high pitch whine from 1 channel - Cpwill 11:00:20 11/02/15 (1)
- RE: Preamp with high pitch whine from 1 channel - Blackdog 15:45:57 11/02/15 (0)
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