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In Reply to: RE: What 12AU7s are you using? posted by flyerfan on March 31, 2014 at 12:10:42:
Your amp puts the 12AU7 heater in series with the cathode resistor for the KT88. Using front end tubes with different heater draw, like the 5814, will change the output tube operating point a little bit.
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Follow Ups
- Did you notice any difference between the two? - Chip647 12:31:05 03/31/14 (0)