Having owned several Berning amps I have found that NOS tubes do make a difference(tho not a large one). I also have settled on RCA as being the best fit for both the 270 and Siegfried amps. My understanding is that 5692 shouldn't be a problem to substitute for 6SN7's. The easiest and most accurate policy in these cases is to call the maufacturer. David has always been very responsive and helpful(via email).
Tube question for Berning EA-230 amp owners...
Has anyone tried using a RCA 5692 red base in place of the 6SN7GTB's in a this amp? I really enjoy the sound of a pair of 1950's black plate RCA 6SN7GTB's I have been using in it lately, and was wondering if the supposedly better sounding 5692 red base would be compatible with the voltage that the EA-230 runs at. Any thoughts or suggestions would be greatly appreciated. Thanks!