RCA Black Plate 6BK7 6BK7B Vacuum Tube Valve NOS NIB For Your Schiit 5V6GT Octal This perfectly-matched quintet of new

This perfectly-matched quintet of new old stock-testing Sylvania-MANUFACTURED 7A7 tubes was tested on our Hickok 800 for shorts

Tube One measured 65/66 while Tube Two measured 69/64 where minimum (65%) is 56/56 and 100% is 87/87

This is a testament to their high emissions

These links appear to be made of stainless steel and rose gold

RCA Black Plate 6BK7 6BK7B Vacuum Tube Valve NOS NIB For Your Schiit 5V6GT Octal This perfectly-matched quintet of newThis new old stock, new in box RCA Black Plate 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; shields between triodes to eliminate crosstalk; great flashing and goal post getters. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONIAN GERMAN PACKAGING REGULATIONS AND