2 US-Made 1625 / VT-136 Vacuum Tubes Milspec NOS-Testing Lot Of Two

2 US-Made 1625 / VT-136 Vacuum Tubes Milspec NOS-Testing Lot Of TwoThis 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

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

This matched pair of Raytheon gray glass 6V6GT output tubes was tested on our Maxi-Matcher 2 at real operating voltages of 400 volts on the plates and a bias of -36 volts for shorts

EIA Factory Codes: RCA livery

new in box Realistic (Radio Shack) Gold Clad 6BN4 / 6BN4A tube tested to spec on our Paul Hart-calibrated TV7/U

This lot of three RCA number 19 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

I am playing them as I write in my Radio Craftsmen RC-2 monoblocks with RCA Living Stereo's CD of Bartok's "Concerto For Orchestra

new in box milspec / industrial RCA 6AB7 / JAN-CRC-6AB7 / VT-176 / 1853 tubes tested to spec on our Paul Hart-calibrated TV7/U

It measured 36 in its triode section where minimum (65%) is 19

new in box GE 21LU8 tubes tested to spec on our Paul Hart-calibrated TV7/U

a D-getter and terrific flashing

US-LABELED 5GJ7 tubes tested to spec on our Paul Hart-calibrated TV7/U

62/35 and 74/56 where minimum (65%) is 50/50 and 100% is 77/77