Quote:
Originally Posted by DaveWM
looking at the voltage chart the V103b should be -9.3 with signal. I wonder if you are having some grid emissions on that tube? but could also have to do with the strength of the input signal.
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I rechecked that voltage, I think my vtvm probe was touching something it shouldn't before. Voltage does change a lot with the signal, but it's in the -25 to -35v range without my extra capacitor. -15 to -20v range with it in there.
Here is the probably the source of my problem. And while the capacitor I added fixes it, it's not so clear what is ultimately causing it. It's not the tube, I've tried several different ones in there. And messing with the plate voltage really doesn't fix this either.
05-17-2012, 02:38 PM
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