Matched Pair Marshall 12AX7 ECC83 Triple Mica Vacuum Tubes Булата Окуджавы Из Philco-LABELED 5Y3G rectifier tube was

Philco-LABELED 5Y3G rectifier tube was tested on our Paul Hart-calibrated TV7/U for shorts

Zenith-LABELED 6AL3 / EY88 tube tested to spec on our Paul Hart-calibrated TV7/U

new in box GE 12AQ5 tubes tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 3900/4500 micromhos

Matched Pair Marshall 12AX7 ECC83 Triple Mica Vacuum Tubes Булата Окуджавы Из Philco-LABELED 5Y3G rectifier tube wasThis matched pair of Marshall 12AX7 ECC83) dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: Tube One: 32 39 Tube Two: 34 42 Minimum (65%) is 32 32 and 100% is 49 49. These tubes have excellent flashing; steel plates; square, top, dimpled O getters and an additional mica spacer for lowered microphonics.. I am playing them in my ArtSound single ended