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Re: Weak XF1s, with lots of flashing

Well...I only used them for a dozen hours or so, then I put them away. They were used in a Superamp--there is one bias adjustment for all four tubes--200ma.

I don't know what the values were when the first dealer tested them--I stood around while he did his thing. He was having trouble with his tester, and had to drag out his other one--after a couple of whacks, he got it to work. I should have known better right then, but I trusted him.


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