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Re: here is a question for you, if you only light one of the filaments, do you get a 152TL :-)

if the 75TL can't be hum-free on AC fils, I don't see how 4 of them in parallel are going to be any MORE hum free... ;-)

DC doesn't sound bad, and it's way easier with tubes like these IMNSHO.

Dave Slagle - did you mean 845 or 485 as a driver? (485 = sparton tube?)

-Ed


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