Matched Pair JJ 12AX7 ECC83 ECC83S Low Noise Vacuum Tubes Valves NOS NIB ECF80 T35 Tube One measured 45/40 while

Tube One measured 45/40 while Tube Two measured 52/50 where minimum (65%) is 40/40 and 100% is 62/62

new in box Philco 7B5 tubes tested to spec on our Paul Hart-calibrated TV7/U

This matched pair of black plate Hytron 6V6GT output tubes was tested on our Maxi-Matcher 2 for shorts

and if it is

Matched Pair JJ 12AX7 ECC83 ECC83S Low Noise Vacuum Tubes Valves NOS NIB ECF80 T35 Tube One measured 45/40 whileThis new old stock, new in box matched pair of JJ low noise 12AX7 ECC83 12AU7 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: 44 48 Tube Two: 46 48 Minimum (65%) is 32 32 and 100% 66 66. These tubes have excellent silkscreening; excellent flashing and O getters. Their filaments are spirally wound hence the "S" in "ECC83S" for low noise