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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: RE: "a more linear driver tube"... posted by Ivan303 on June 15, 2020 at 06:24:01:
Yes, answering questions is OK - and I am happy to do it.
You used the term "original Paramount" - that used a 12AT7. There were some issues in certain specific cases which led to a revision incorporating a slow-start driver power supply and a few other tweaks. We switched to the 5670 at that time. There was an upgrade kit for earlier amps.
Incidentally, we did do a few before-and-after distortion measurements. I was pleased to find that both drivers produced essentially the same distortion harmonic spectrum at the output, suggesting to me that the distortion was dominated by the output tube - the current source plate load made the 12AT7 more linear than a [Sovtek] 2A3.
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Follow Ups
- RE: "a more linear driver tube"... - Paul Joppa 06/15/2008:55:37 06/15/20 (6)
- RE: "a more linear driver tube"... - Deke609 06:05:11 06/16/20 (2)
- Thanks... - Ivan303 07:26:02 06/16/20 (1)
- RE: Thanks... - Paul Joppa 08:35:13 06/16/20 (0)
- Only heard the 5670 version... - Ivan303 16:35:45 06/15/20 (2)
- RE: Only heard the 5670 version... - Paul Joppa 21:22:40 06/15/20 (1)
- Sadly no 5670's in the tube stash... - Ivan303 18:59:28 06/18/20 (0)
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