Matched Pair RCA Radiotron Number / Type 76 #76 Vacuum Tubes Valves 17C5 Septal Tube One drew 16

Tube One drew 16

Tube Two: 76/77

gray plates and an anode radiator for cooler operation and longer life

This paperback book is in very good condition

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

Matched Pair RCA Radiotron Number / Type 76 #76 Vacuum Tubes Valves 17C5 Septal Tube One drew 16This 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