Matched Pair Raytheon 6V6 6V6GT Vacuum Tubes Valves Black Glass Copper Support Rods NOS-Testing 6X8 Nonal T61

Matched Pair Raytheon 6V6 6V6GT Vacuum Tubes Valves Black Glass Copper Support Rods NOS-Testing 6X8 Nonal T61This matched pair of Raytheon black glass 6V6GT output tubes was tested on our Maxi Matcher 2 at real operating voltages of 400 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Transconductance was 2810 micromhos for Tube One and 2900 for Tube Two. Plate current draw was 32 and 32. 6 milliamps, respectively. (New US made 6V6s typically test with plate current from the mid teens to mid 30s

These six RCA black plate RCA 50B5 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

tall bottles

not included)

This historical recording sounds pretty good

RF shielding

Shipping Credit: $64

They have chamfered top O getters

Transconductance measured 44 and 48 where minimum (65%) is 35 and 100% is 54

5 milliamps' plate current and measured 2760 micromhos

new in box RCA 8056 Nuvistor tube tested to spec on our Paul Hart-calibrated TV7/U

This matched pair of Sylvania 6AU6A tubes was tested on our Paul Hart-calibrated TV7/U for shorts

had excellent frequency response and was very quiet