The first electronic amplification of sound was done with Vacuum Tubes. We have pre-amp, power and rectifier vacuum tubes among other types in New Old Stock from the golden era of American & European manufacturing as well as current production tubes from today.
Custom-designed and custom-built by industry experts with ideal tube matching in mind. Apex tubes are matched more closely and more accurately than you'll find anywhere else. Visit https://www.apexmatching.com
for more information
Yellow Jackets allows amplifiers using common power tubes to use EL84s without modification or rebiasing.
Tube Amp Doctor (TAD)
TAD is a German company established in 1993 which selects and matches electronic tubes and manufactures musical instrument accessories.
Hartley Peavey founded Peavey Electronics, one of the world's largest manufacturers and suppliers of musical and professional audio equipment, in 1965, having built his first amplifier in 1957.