heaters connected to cathode?! - Page 2 - diyAudio
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Old 16th November 2013, 11:30 PM   #11
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Originally Posted by Magz View Post
Sounds like a directly coupled stage, with one half of the 6SN7 feeding the other, for increased gain. Rather low plate voltage for a 6SN7.
Brilliant! This has been driving me crazy. Is this a well known type of circuit? Any common schematics as examples? I think a re-wiring might be in order to fix the plate voltages.....
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Old 17th November 2013, 03:46 AM   #12
Magz is offline Magz  United States
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Originally Posted by lordearl View Post
Brilliant! This has been driving me crazy. Is this a well known type of circuit? Any common schematics as examples? I think a re-wiring might be in order to fix the plate voltages.....
Yes, common. Often used in preamps to increase gain. Supratek Chenin preamps are an example, where they use a directly coupled 6SN7 as the gain stage.
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