Matched Pair Ken-Rad 6K6 6K6GT Vacuum Tubes Black Glass

Matched Pair Ken-Rad 6K6 6K6GT Vacuum Tubes Black GlassThis matched pair of Ken Rad MANUFACTURED 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 1930 micromhos, 29. 4 milliamps' plate current. Tube Two measured 1780 29. 5. New nominal is within one standard deviation of 1900. These tubes have copper support rods; rectangular mica spacers; black and silver

This pressing has lightly-moderate surface noise audible in quiet passages and barely-audible in moderate passages and louder

mesh plate tubes tested 31 and 36 on our Paul Hart-calibrated TV7/U where minimum (65%) is 25 and 100% is 38

952 and 0-39 date codes

solid saucer getters and excellent top and side flashing

rectangular mica spacers

These three US-made 6BY5G tubes were tested on our Paul Hart-calibrated TV7/U for shorts

I am playing Easy Star All-Stars' "Dub Side of The Moon" in my Radio Craftsmen RC-2 amplifiers and they sound outstanding

The Rayteons are Japanese and the Sylvania is American

They tested (from left to right) as follows: 81%

excellent flashing and gray plates

milspec Sylvania 7F8W / JAN-CHS-7F8W tube tested to spec on our Paul Hart-calibrated TV7/U

This perfectly matched pair of General Electric 6AU6A tubes was tested on our Hickok 800 for shorts