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Old 2nd November 2009, 07:04 PM   #11
45 is offline 45  Italy
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The triode-strapped 429a in the schematics should have Rp = 2.2K and mu = 15 approximately.

Cheers,
45
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Old 3rd November 2009, 10:19 AM   #12
CFT is offline CFT  United States
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Thanks Kevin and 45 for the info.

In parafeed design one does not need to care much about the primary impedance, but the ratio of the transformer.....true?

In this case Kevin, you think I can try out the A-20 as a parafeed tranny in a 26 tube preamp? How about as an input tranny? Thanks!
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