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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: Drastic measures in Desparate Times.........(long) posted by drummerwill on April 23, 2007 at 14:42:48:
...remember that the 417A will oscillate like a... well, oscillate really badly if given half a chance. It doesn't like much more than a 1K grid resistor (I use 10K max) and likes a grid stopper as well. Oscillation can create audible hiss. As you increase the volume setting you increase the value of the "grid resistor" as seen by the 417A, so the symptoms make sense.Cheers,
Mike Spence
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- Probably the 417A getting upset... - Mike Spence 20:13:21 04/25/07 (0)
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