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Transformer in the cathodes ??
Transformer in the cathodes ??
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Old 10th April 2009, 04:46 PM   #21
Bandersnatch is offline Bandersnatch  United States
diyAudio Member
Join Date: Jul 2003
Location: Ann Arbor, MI
The screens have a dropping R from B+ and a cap bypass to the cathode node. I tried ref'ing them to ground with various regulators and with signal on the cathodes( and thus a signal-varied g2-cathode voltage) found the results not to my liking.

I found the ratio of g2 to anode current smaller in the 6AC7 v. the 6AU6. The 6AU6 is a very fine small pentode, very reasonable claim to being the 6SN7 of pentodes...linear, useable( and useful ), etc...
the Tnuctipun will return
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