upscale certified tubes

tung-sol 6l6gc-str

tung-sol kt120

gold lion e88cc / 6922

gold lion u77 / 5ar4 new production rectifier

mullard kt88

electro-harmonix 300b gold grid

tung-sol 12ax7 / ecc803-s gold pin

gold lion ecc83 / 12ax7 / cv4004

mullard el34

russian 6c33-b

gold lion n709 / el84 new production

tung-sol 12au7w / 6189

gold lion kt77 / el34

russian 6as7g / 6n13s

mullard 6bq5 / el84 new production

electro-harmonix 6h30pi gold pin

mullard new production 12at7 / ecc81

mullard new production 12au7 / ecc82

tung-sol new production 5751 gold pin

tung-sol 5881