Matched Pair National Union NU Number / Type 76 #76 Vacuum Tubes Odd Tubes Transconductance measured an almost-perfectly-balanced 82/84

Transconductance measured an almost-perfectly-balanced 82/84 where minimum (65%) is 56/56 and 100% is 86/86

Fortunately the wire is still there and replacing the pin should not be too difficult

Tube One measured 1380 micromhos and drew 10

Plate current measured 67

Matched Pair National Union NU Number / Type 76 #76 Vacuum Tubes Odd Tubes Transconductance measured an almost-perfectly-balanced 82/84This matched pair of National Union type 76 triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 49 for Tube One and 52 for Tube Two where minimum (65%) is 36 and 100% is 55. These tubes have shiny, dark gray, rounded plates; crenelated, top, rectangular mica and smooth rectangular bottom spacers and excellent flashing. I have played them in my Radio Craftsmen