SOVTEK makes very good KT88 tubes & do not forget GROOVE TUBEs KT88s.
The 6SH7 input tubes are supposed to be millitary grade! Gha! Get something with a glass envolope like TUNGSTRAM or ELECTRO HARMONIX.
You do get better 5U4G rectrifiers also from SOVTEK & GROOVE TUBE. Do check out GROOVE TUBE - they hand-match their tubes to very fine tolerances.
Kind Regards,
Dewald Visser
The 6SH7 input tubes are supposed to be millitary grade! Gha! Get something with a glass envolope like TUNGSTRAM or ELECTRO HARMONIX.
You do get better 5U4G rectrifiers also from SOVTEK & GROOVE TUBE. Do check out GROOVE TUBE - they hand-match their tubes to very fine tolerances.
Kind Regards,
Dewald Visser