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Single Ended Triodes (SETs), the ultimate tube lovers dream.

RE: What tubes to use with this Interstage Transformers?

I have recently built a 300b amp with a UTC H series interstage of 1:2.5. It has been very problematic. A low impedance source is necessary, <900 ohms is a must. At that it still quits 2v before 0 bias, ie; it can't handle grid current. I still haven't solved the ringing problem.


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