Amperex "Bugle Boy" tube compatibility

The 6n11 has different heating current and is louder on HF than a ecc88. If you want to replace the tube in a 6n11 circuit, without dulling down the treble, then a probable is a 6n1p and not an ecc83.

G

Dover, Now I should be responsible if someone doesn’t read the entirety of one of my posts? Especially as in this case I have already stated in no uncertain terms that the proposal is a no-go, for two other compelling reasons? I think I have always been courteous to you, even when on the odd occasion I have disagreed with advice you’ve given. I am actually rather shocked at your vitriol, which seems uncalled for, if not also ridiculous. By the way, the fact is that you CAN run a 12AX7 off a 6.3V filament supply, in case that’s what you are so enraged about.  When running the filaments off a 12V supply, the filament supply attaches to pins 4 and 5, which lights up both halves of the tube with the respective filaments in series.  Pin 9 is left open.  If you are using a 6.3V supply, you use pins 4 and 9 for one half and pins 5 and 9 for the other half of the dual triode.  This is a unique feature of the 12AU, T, Y, and X7 dual triodes.

Most "Bugle Boys"  for sale are fakes .

Apart from rebranded Richardson's Sylvanias I have not come across fake ecc88 BB, what for?
Same tube as Amperex ecc88 white, so plenty of them, used of course.

G

Wouldn't Amperex "Bugle Boy" ECC88s, if BB ECC88s were ever actually made by Amperex, be a premium value in tube world?  If so, you can bet someone somewhere has made some fakes of it.  I think there are even fake Telefunkens with the diamond engraved in the glass envelope on the base.  To distinguish that TFK fake from real, you have to know whether the diamond is embossed or engraved (in other words, sitting ON the glass surface or grooved into the glass surface).