RCA Cunningham 5Z3 Vacuum Tube Black Plate Rectifier Shoulder ST Shape 3CZ3A Octal I am playing it in

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

As I test new-in-box 5963s

This GE 35Z5GT tube tested 55 our Paul Hart-calibrated TV7/U where minimum (65%) is 40 and 100% is 62

Meine Seele Hort Im Sehen

I am playing them in my ArtSound single-ended 805 monoblocks with Steely Dan’s seminal "Aja" album

RCA Cunningham 5Z3 Vacuum Tube Black Plate Rectifier Shoulder ST Shape 3CZ3A Octal I am playing it inThis 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