RCA Cunningham 5Z3 Vacuum Tube Black Plate Rectifier Shoulder ST Shape 3CZ3A Octal This black plate Delco 5Y3G

This black plate Delco 5Y3G rectifier tube was tested on our Paul Hart-calibrated TV7/U for shorts

6 milliamps/2150 micromhos and 18

I just cleaned this four LP set on my VPI 16

I am playing it in Bottlehead Crack headphone amplifier as a 12AU7 substitute and it sounds excellent

new in box Sylvania 1291 industrial-quality tubes tested to spec on our Paul Hart-calibrated TV7/U

RCA Cunningham 5Z3 Vacuum Tube Black Plate Rectifier Shoulder ST Shape 3CZ3A Octal This black plate Delco 5Y3GThis RCA Cunningham 5Z3 rectifier tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. It tested 68 in Section One and 58 in Section Two where minimum (65%) is 40 40 and 100% is 62 62. It has a tall, engraved stamped base; black plates, copious amounts of flashing and a nice, old fashioned shoulder bottle. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE