upscale certified tubes

gold lion 6v6gt / cv511

sovtek 5881

tung-sol 6sn7gtb

gold lion ecc83 / b759 / 12ax7

electro-harmonix 12ay7 / 6072a

tung-sol new production 5ar4 rectifier

gold lion kt66

sovtek 6550we

electro-harmonix kt90

sovtek 6h30pi

mullard new production cv4004 / 12ax7

mullard new production gz34 / 5ar4 rectifier

gold lion kt88

tung-sol kt150

electro-harmonix 6sn7

gold lion ecc81 / b739 / 12at7

gold lion ecc82 / b749 / 12au7

sovtek 5ar4

electro-harmonix kt88

tung-sol 12at7