2 US-Made 1625 / VT-136 Vacuum Tubes Milspec NOS-Testing Lot Of Two Muir Mathieson They were Groove Tube-matched both

They were Groove Tube-matched both with number 6 ratings

They tested (from left to right) as follows: 35 and 52 where minimum (65%) is 40 and 100% is 62

This lot of three Arcturus 6L7 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

new in box RCA 6LY8 tested to spec on our Paul Hart-calibrated TV7/U

2 US-Made 1625 / VT-136 Vacuum Tubes Milspec NOS-Testing Lot Of Two Muir Mathieson They were Groove Tube-matched bothThis new old stock testing pair of 1625 VT 136 output triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 64 for Tube One and 69 for Tube Two where minimum (65%) is 40 and 100% is 62. These tubes have excellent flashing; Micanol bases; a dimpled sheet getter and double D getters, respectively and two additional support rods per tube for increased rigidity and