Matched Pair General Electric GE 6K6 6K6GT Vacuum Tubes Black Glass Silvertone Gebraucht new in box RCA number

new in box RCA number / type #38 tube tested to spec on our Paul Hart-calibrated TV7/U

This Tung-Sol 0B3 / OB3 tube tested to spec on our Paul Hart-calibrated TV7/U

It is sold as-is with no returns

art nouveau look

These four Sylvania-MANUFACTURED 6U7G tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair General Electric GE 6K6 6K6GT Vacuum Tubes Black Glass Silvertone Gebraucht new in box RCA numberThis matched pair of GE 6K6 6K6GT tubes was tested on our Maxi Matcher 2 with 325 volts on the plates and a bias of 36 volts for shorts, gas, plate current and transconductance. There were no shorts or gas. Tube One measured 1200 micromhos, 18. 6 milliamps' plate current. Tube Two measured 1510 18. 7. New nominal is within one standard deviation of 1900. These tubes have copper support rods; rectangular mica spacers; black and silver bottles and 3 52