Matched Pair RCA Clear Top 7AU7 Vacuum Tubes NOS NIB 6SN7 Substitute With Adapters Digital Oscilloscope new in box matched trio

new in box matched trio of GE-MANUFACTURED 12B4A tubes was tested on our Paul Hart-calibrated TV7/U for shorts

Tube One measured 1380 micromhos and drew 10

but the time can be set

WE CAN ONLY TEST FOR THE PARAMETERS MENTIONED IN THE LISTING

This RCA Cunningham 6C6 tested at 38 on our Paul Hart-calibrated TV7/U where minimum (65%) is 31

Matched Pair RCA Clear Top 7AU7 Vacuum Tubes NOS NIB 6SN7 Substitute With Adapters Digital Oscilloscope new in box matched trioThis new old stock, new in box matched pair of RCA Clear Top 7AU7 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 78 73 while Tube Two measured 81 72 where minimum (65%) is 58. I am playing them in my Sound Craftsmen RC 2 monoblock amplifiers with the included adapters and they sound outstanding. They are dead quiet when just the amplifier is running and