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Old 7th December 2012, 09:44 AM   #11
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Quote:
Originally Posted by Dragondreams View Post
Hum.

On Fred's page he actually states:
"This results in a significant reduction of AC hum as compared to the original "Real McTube", which used AC to directly heat the tube's filaments."
So Fred thinks a 12AX7 is a directly heated double triode.... cute.
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Old 7th December 2012, 09:47 AM   #12
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Quote:
Originally Posted by costis_n View Post
So Fred thinks a 12AX7 is a directly heated double triode.... cute.
I think not. I think he simply meant that there was no rectification in the heater supply...
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