RCA Black Plate 6BK7 6BK7B Vacuum Tube Valve NOS NIB For Your Schiit 5V6GT Octal These tubes are very-well-built and

These tubes are very-well-built and extremely-rugged

EIA Factory Codes: none

new in box US-made 6JD6 tubes in this lot

This matched pair of Cunningham / RCA 6F5s were tested on our Paul Hart-calibrated TV7/U for shorts

forward sound with great bass articulation as well

RCA Black Plate 6BK7 6BK7B Vacuum Tube Valve NOS NIB For Your Schiit 5V6GT Octal These tubes are very-well-built andThis 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