RCA 6BK7 6BK7B Black Plate Vacuum Tube NOS NIB For Your Schiit

RCA 6BK7 6BK7B Black Plate Vacuum Tube NOS NIB For Your SchiitThis new old stock, new in box RCA 6BK7B tube tested to spec on our Paul Hart calibrated TV7 U. I have played it in my Schiit Audio Vali 2 headphone amplifier and it sounded great. This variety has black, winged plates with one rectangular hole per plate; copper support rods; large shields between triodes to eliminate crosstalk; great flashing and goal post getters. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT.

I just cleaned this four LP set on my VPI 16

new in box GE 6JZ6 tubes tested to spec on our Paul Hart-calibrated TV7/U

This new old stock-testing Sylvania 6L6GC was tested on our Maxi Matcher 2 for shorts

This lot of three US-made 7F7 tubes was tested on our Paul Hart-calibrated TV7/U and measure as follows:

These seven Ken-Rad 12K8 tubes tested to spec on our Paul Hart-calibrated TV-7/U

This new old stock-testing matched pair of milspec RCA metal bottle JAN-CRC-6V6 output tubes was tested on our Maxi-Matcher 2 with 400 volts on the plates and a bias of -36 volts for shorts

It’s a good pressing of a 1954 performance from right on the cusp of mono high fi

a globe / balloon style bottle and beautiful flashing

This lot of seven GE new old stock

top D getters and anode radiators

They measured 96/80 for Tube One and 98/80 for Tube Two

It measured 50/46 where minimum (65%) is 40/40 and 100% is 62/62