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.
Electro-HarmonixElectro-Harmonix is a New York based company known for pedals and rebranded vacuum tubes
Vacuum Tube - 5AR4, Chinese
Chinese 5AR4 Vacuum Tube
Vacuum Tube - 5U4GB, Electro-Harmonix
Superior directly heated rectifier Diode. Replacement for all 5U4 types, including NOS-style "big bottle" tubes.
Vacuum Tube - 6CA4, Electro-Harmonix
Electro-Harmonix 6CA4 full-wave rectifier tube. Made in Russia.