Sorry, but where is the grid resistor /to ground/ of 6BQ5?
There wasn't one...
OK....I'm sure that RCA is right!
It didn't seem anybody messed with the original circuit... The fact that the resistor is not grounded was the main reason for my starting this thread: while I'm not totally new to 'toobs', I'm still light years away from being able to understand all the nuances (doing the math, etc.)...
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