Matched Pair Sylvania 6AU6 Vacuum Tubes NOS-Testing 12EQ7 NOS NIB THERE WILL BE NO REPLACEMENTS

THERE WILL BE NO REPLACEMENTS FOR LOST PACKAGES OR TUBES THAT FAIL

new in box RCA-MANUFACTURED

new in box matched quad of CBS-Hytron black plate 6CL6 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

new in box milspec (US Navy) Raytheon CRP-78 number / type 78 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Sylvania 6AU6 Vacuum Tubes NOS-Testing 12EQ7 NOS NIB THERE WILL BE NO REPLACEMENTSThis new old stock testing matched pair of Sylvania 6AU6 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 82 for Tube One and 84 for Tube Two where minimum (65%) is 58. These tubes have top, U getters; gray plates and excellent flashing. I am playing them in my Musical Paradise MC 3 single ended integrated amplifier (with adapters, not included) with Aimee