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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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In Reply to: Fisher KX-200 posted by Awe-d-o-file on June 30, 2015 at 19:23:36:
I think it makes a pretty poor phase splitter/driver into PP power tubes in any case. It's a not very good driver to boot. Even into 6BQ5s and any other easy to drive power tube.I know that many prefer an interstage transformer as splitter (for good reason) or a concertina, to twin triodes in LTP with a shared R as source. I am happy with 6CG7s in LTP with a ET CCS driving PP EL84Ms.
IIRC correctly your circuits often contain a concertina.
I wonder if any of these PP 7581 vintage items have sufficient PT current reserves to run grunty low-mu twin triodes in LTP and with a FET? Enough height for an ECC99 or 6CG7?
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
Edits: 07/03/15 07/03/15
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Follow Ups
- "The 'X7 triode makes a VERY poor "concertina" phase splitter" - Timbo in Oz 19:12:13 07/03/15 (2)
- RE: "The 'X7 triode makes a VERY poor "concertina" phase splitter" - Eli Duttman 14:23:21 07/04/15 (1)
- yes, I MEANT 7591 but typed 7581 - Timbo in Oz 15:06:18 07/04/15 (0)
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