JJ Kinkless Tetrode 88s are fine tubes... for 6550s I prefer the Tung-Sol remakes..If that's true then it's an unfortunate problem (I presume they're finding it almost impossible to resolve).
If you don't mind, of course I want to ask which of the current manufactures' power tubes (6550 and KT88) might be better in this regard, in your opinion.
I feel lucky to be so happy with EL34II. And they *fit*, physically, in the YBA-300. The above tubes won't.


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