Matched Pair General Electric GE 12BH7 Vacuum Tubes 12AU7 Substitute For Tube Rolling NOS-Testing 0D3 Milspec These three GE 6EU8 tubes

These three GE 6EU8 tubes tested to spec on our Paul Hart-calibrated TV7/U

There is no transconductance reference reading and as I test new in box 12AU7s

6/1980 where new 6F6s measure from approximately 2000 micromhos with plate current draw in the 20s

came from an excellent lot and should work fine

Matched Pair General Electric GE 12BH7 Vacuum Tubes 12AU7 Substitute For Tube Rolling NOS-Testing 0D3 Milspec These three GE 6EU8 tubesThis new old stock testing matched pair of GE 12BH7A dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 48 50 while Tube Two measured 49 48 where minimum (65%) is 30 30 and 100% is 46 46. These tubes have gray plates; copper support rods; excellent flashing; top harp lyre getters and anode radiators for improved cooling and longer tube life. I have played them