Matched Pair General Electric GE 12SN7 12SN7GT Vacuum Tubes Valves Copper Support Rods NOS-Testing JAN-CTL-6AR6 6098 These seven US-made 5V6GT tubes

These seven US-made 5V6GT tubes tested as follows on our TV7/U: 40

This lot of four Tung-Sol coated glass 50L6GT tubes was tested on our Paul Hart-calibrated TV7/U for shorts

new in box GE 6GC5 tubes tested to spec on our Paul Hart-calibrated TV-7/U

This Radio Shack / Realistic 6JE6C tube tested 80 on our Paul Hart-calibrated TV7/U where minimum is 54 and new is 100

It measured 40 where minimum (65%) is 31

Matched Pair General Electric GE 12SN7 12SN7GT Vacuum Tubes Valves Copper Support Rods NOS-Testing JAN-CTL-6AR6 6098 These seven US-made 5V6GT tubesThis new old stock testing matched pair of GE 12SN7GT dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 81 82 for Tube One and 84 83 for Tube Two where minimum (65%) is 50 50 and 100% is 77 77. They have copper support rods; 4 17 188 5 and 2 48 188 5 date provenance codes, respectively; side, horseshoe getters and excellent flashing. As I write, I am