Hi,
This is what I like for the MV55:
1) Mullard Long plate 12AX7
Sylvania 6SN7W short bottle
2) GE 5751 tri mica
STC Brimar CV1988 black glass
3) Amperex Bugle Boy 12AX7
RCA VT-231
I'm using JJ E34L blue glass. Tube rolling the 12AX7 and the 6SN7 changes the sound more than the EL34. I prefer the JJ E34L to Svetlana for a more airy and less harsh highs.
Regards
This is what I like for the MV55:
1) Mullard Long plate 12AX7
Sylvania 6SN7W short bottle
2) GE 5751 tri mica
STC Brimar CV1988 black glass
3) Amperex Bugle Boy 12AX7
RCA VT-231
I'm using JJ E34L blue glass. Tube rolling the 12AX7 and the 6SN7 changes the sound more than the EL34. I prefer the JJ E34L to Svetlana for a more airy and less harsh highs.
Regards