Matched Pair RCA Radiotron Number / Type 76 #76 Vacuum Tubes Valves 17C5 Septal Transconductance measured 59 for Tube

Transconductance measured 59 for Tube One and 60 for Tube Two where minimum (65%) is 40

I have played it in my Bottlehead Crack headphone amplifier and it sounds outstanding

Tube One measured 63 while Tube Two measured 67 where minimum (65%) is 43

Tube Two: 76/77

Matched Pair RCA Radiotron Number / Type 76 #76 Vacuum Tubes Valves 17C5 Septal Transconductance measured 59 for TubeThis perfectly matched pair of RCA Radiotron 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 48 for both where minimum (65%) is 36 and 100% is 55. These tubes have black, rounded plates; round top mica and rectangular bottom spacers; mica snubbers (for lowered microphonics) and excellent flashing. I have played them in my Radio Craftsmen RC 2