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In Reply to: RE: Attempting a simple 12AU7 preamp design. posted by gavinhaley on April 15, 2016 at 20:21:10
You can look up the data sheet, but most tubes are spec'd at +/-100v heater to cathode. You don't want to get too close to either end.
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Paul
I found that !2AU7s should be run at about 8ma to be their most linear.What puzzles me is a 6CG7 and a 6SN7 are much more linear but the mass availability isn't there with the 6CG7 as it is for the 12AU7.
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At what plate-cathode voltage did 8mA seem best?
About 300v as I recall.
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