4 RCA 12SG7 VT209 VT-209 Vacuum Tubes Valves Milspec Small Logo Lot Of Four Juan Rosenkavalier

4 RCA 12SG7 VT209 VT-209 Vacuum Tubes Valves Milspec Small Logo Lot Of Four Juan RosenkavalierThese four milspec RCA small logo 12SG7 VT 209 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Their readings are 54, 56, 66 and 71 where minimum (65%) is 42. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS.

This is the type of bracelet that came with the digital watches of that era

chamfered O getters and rectangular radiators for cooler operation and longer tube life

Tube One measured 56 while Tube Two measured 57 where minimum (65%) is 38 and 100% is 58

Transconductance measured 72 for Tube One and 74 for Tube Two where minimum (65%) is 58

had excellent frequency response and was very quiet in my Bottlehead

This Westinghouse 25AV5GT tube -- and another just like it -- tested to spec on our Paul Hart-calibrated TV7/U

All of these tubes have very-good-testing triodes and each has a strong-testing as well as a functioning diode

new in box Sylvania 3KT6 tube tested to spec on our Paul Hart-calibrated TV7/U

gold pin 7AU7 dual triode was tested on our TV7/U for shorts

Tube One measured 43 while Tube Two measured 46 where minimum (65%) is 32 and 100% is 49

Tube One measured 65/66 while Tube Two measured 69/64 where minimum (65%) is 56/56 and 100% is 87/87

both with current readings of 34 and transconductance of 3520