Matched Pair RCA 1625 / VT-136 Vacuum Tubes Milspec NOS-Testing Franz Andre Minimum (65%) is 57/57 and

Minimum (65%) is 57/57 and 100% is 88/88

These mesh plate National Union number 78 tube were tested on our Paul Hart-calibrated TV7/U for shorts

58 and 67 where minimum (65%) is 48

Etsy will indicate how many tubes are available in this Dutch auction

These six US-made 84 / 6Z4 rectifier tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair RCA 1625 / VT-136 Vacuum Tubes Milspec NOS-Testing Franz Andre Minimum (65%) is 57/57 andThis new old stock testing matched pair of RCA 1625 VT 136 output triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 67 for Tube One and 68 for Tube Two where minimum (65%) is 40 and 100% is 62. These tubes have excellent flashing; Micanol bases; H2E and K1E date codes, respectively; double D getters; US Army Signal Corps SC278A contract codes and two