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Do It Yourself (DIY) paradise for tube and SET project builders.

RE: Powered it up WITHOUT the driver tubes...still misbehaving

take the coupling cap off at the power tube's grid. You'll need a couple meters with their leads clipped to a few places. The power tubes current sense, and some of the bias supply. Then fire it and you should find the problem.
cheers,
Douglas

Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.


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