Matched Pair RCA Radiotron Number / Type 76 #76 Vacuum Tubes Valves 17C5 Septal

Matched Pair RCA Radiotron Number / Type 76 #76 Vacuum Tubes Valves 17C5 SeptalThis 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

These tubes have shiny

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

This paperback book is in very good condition

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

Both measured 72 where minimum (65%) is 58

Tube Two: 76/77

Tube One drew 16

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

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

3 milliamps' plate current while Tube Two drew 23

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

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