Matched Trio General Electric GE 12HG7 12GN7 12GN7A Vacuum Tubes NOS NIB Fat Bottles 6K6GT Black Glass there are no reference numbers

there are no reference numbers on it

There were no shorts

steel support rods and excellent flashing

new in box Cunningham 14F7 tube tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 50/52 for Tube One and 53/52 for Tube Two where minimum (65%) is 25/25 and 100% is 39/39

Matched Trio General Electric GE 12HG7 12GN7 12GN7A Vacuum Tubes NOS NIB Fat Bottles 6K6GT Black Glass there are no reference numbersThis matched trio of GE 12HG7 tubes was tested on our Paul Hart calibrated TV7 U (on the 12BY7 setting) for shorts, gas and transconductance. There were no shorts or gas and they measure as follows: 75, 78 and 80 where minimum (65%) is 46 and 100% is 71. These tubes have anode radiators for cooler operation and longer tube life; side O getters; solid saucer getters and excellent top and side flashing. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF