Matched Pair RCA Radiotron Number / Type 76 #76 Vacuum Tubes Valves 17C5 Septal Tube Two: 76/77

Tube Two: 76/77

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

This paperback book is in very good condition

It sounds very good with light surface noise and the occasional click and pop

new in box Raytheon 1H5GT tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair RCA Radiotron Number / Type 76 #76 Vacuum Tubes Valves 17C5 Septal Tube Two: 76/77This 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