Matched Pair RCA 6K6 6K6GT Vacuum Tubes Valves October 17 2025 It is a bit microphonic

It is a bit microphonic

Transconductance measured micromhos with a plate current draw of milliamps

rectangular mica and smooth rectangular bottom spacers and excellent flashing

They measured 90/82 for Tube One and 91/84 for Tube Two where minimum (65%) is 57/57

Matched Pair RCA 6K6 6K6GT Vacuum Tubes Valves October 17 2025 It is a bit microphonicThis matched pair of RCA MANUFACTURED 6K6GT tubes was tested on our Maxi Matcher 400 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Tube One drew 21. 6 milliamps' plate current and measured 1610 micromhos. Tube Two measured 25 1860. New nominal is within one standard deviation of 1900. These tubes have black plates; copper support rods; rectangular mica spacers and gapped D getters. As I