Tung-Sol 12AV7 Vacuum Tube NOS NIB For Your Bottlehead 76 Seventysix 6 volts on the filaments

6 volts on the filaments

This lot of four Sylvania 12Q7GT tubes tested to spec on our Paul Hart-calibrated TV7/U

This Philco 1C77G tube tested to spec on our Paul Hart-calibrated TV7/U

new in National Union 1625 / VT-136 tested to spec on our Paul Hart-calibrated TV7/U

a dimple sheet getter

Tung-Sol 12AV7 Vacuum Tube NOS NIB For Your Bottlehead 76 Seventysix 6 volts on the filamentsThis new old stock, new in box Sylvania 12AV7 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 41 42 where minimum (65%) is 21. This tube has black plates; an O getter; terrific flashing and a 3226104 3 provenance date code. I am playing it in Bottlehead Crack headphone amplifier as a 12AU7 substitute and it sounds fine. WE HAVE SCORES OF THOUSANDS OF