Matched Pair RCA 6K6 6K6GT Vacuum Tubes Valves October 17 2025

Matched Pair RCA 6K6 6K6GT Vacuum Tubes Valves October 17 2025This 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

tall bottles

new in box GE 12AX4 tubes tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured micromhos with a plate current draw of milliamps

I have played it in one of my Radio Craftsman RC-2 monoblocks and it sounds outstanding

These tubes have acid-etched codes and designations as well as silk-screened 68-26 188-5 67-50 production run/provenance codes

I just cleaned this LP on my VPI 16

It is a bit microphonic

These nine new old stock

rectangular mica and smooth rectangular bottom spacers and excellent flashing

They have double O getters

035 and 226 date codes

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