Matched Pair RCA Radiotron Number / Type 76 #76 Vacuum Tubes Valves 17C5 Septal new in box Raytheon 1H5GT

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

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

Matched Pair RCA Radiotron Number / Type 76 #76 Vacuum Tubes Valves 17C5 Septal new in box Raytheon 1H5GTThis 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