Hi Mark,

The resistor is definetly 6 Mohm, but you bring up an interesting point
about moisture.

I have noticed that the set seems to fade out more during rainy or high
humidity days. I didn't even want to mention it because it sounded
silly, but I did wonder if humidity might be a factor.

On some clear, dry days, I have not had any trouble at all. So, maybe
you have something there.

I will carefully go back over the items you mentioned and maybe replace
all of the caps in the circuit. Replacing tubes hasn't made a
difference. Thanks.