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RE: 6V6 Amp Feedback

"I too like "fixed" bias in a PPP setup, as exact setting of each tube's 'idle' current is important. The downside is that grid to ground resistance limit is lower, when "fixed" bias is employed."

Eli, I've converted a number of amps from self- to fixed-bias without changing the grid resistor. It's never created a problem that was discernible either with measurements or by ear. What's the risk of using a higher value grid resistor than recommended by the manufacturer? Note that I'm not talking about values so high they might create a grid leak effect.






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