Matched Pair General Electric GE Nickel Plate 6AU6 Vacuum Tubes Valves 6L7 Gebraucht They have engraved bases

They have engraved bases

but with some wear

This Sylvania 7F7 was tested on our Paul Hart-calibrated TV7/U for shorts

This lot of three Raytheon 12AX4GT / 12AX4GTA / 12AX4GTB tubes tested to spec on our Paul Hart-calibrated TV7/U

This milspec CBS-Hytron USN-CHY-5Y3WGTA / 5Y3 black plate rectifier tube was tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair General Electric GE Nickel Plate 6AU6 Vacuum Tubes Valves 6L7 Gebraucht They have engraved basesThis perfectly matched pair of GE nickel plate 6AU6 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Both measured 72 where minimum (65%) is 58. These tubes have top, harp getters; nickel plates and excellent flashing. I am playing them in my Musical Paradise MC 3 single ended integrated amplifier (with adapters, not included) with Aimee Mann's seminal "Magnolia" album and they sound