Original Tungsol, Philips ECG, GE 6550a and SED-C are worth pursuing.
Just say 'no' EH and Svetlana (though EH makes a good KT88.)
I'm not familiar with the Tungsol remake.
Just say 'no' EH and Svetlana (though EH makes a good KT88.)
I'm not familiar with the Tungsol remake.