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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: CCS Issue posted by deafbykhorns on December 26, 2016 at 09:20:25:
Many years ago (10? more?) there were survival issues with the 10M90S. I was only peripherally involved at the time, but it was never really resolved - I think trying one chip after another until a survivor was found, was the best solution. Not really satisfactory!
Speculation at the time was oscillation; the chip does have an enormous transconductance. Injecting a signal could trigger misbehavior, especially if something is pushed out of its linear range. At very high frequencies, minor changes in layout or lead dress can lead to unexpected oscillation.
I can only find the 6E5P as a Russian version of the 6E5 tuning indicator tube - is that the right tube? If so, 27mA into a 6E5 seems high since the rated target current is 4.5mA. That could lead to clipping which can also trigger oscillations.
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Follow Ups
- RE: CCS Issue - Paul Joppa 15:31:18 12/26/16 (10)
- RE: CCS Issue - deafbykhorns 16:09:29 12/26/16 (2)
- RE: CCS Issue - Paul Joppa 13:35:20 12/27/16 (1)
- RE: +1 on gridstopper - deafbykhorns 18:17:03 12/27/16 (0)
- 6E5P - Maxamillion 15:52:25 12/26/16 (6)
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