RCA 931 931A Photomultiplier Vacuum Tube Voronezh Girls Vocal the centering pin is missing

the centering pin is missing on Tube One and Tube Two's base is cracked

This trio of RCA 6K7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

gas and emissions

Its only flaw is an inscription on the first blank page

It measured an almost-perfectly-balanced 82/84 where minimum (65%) is 50/50 and 100% is 77/77

RCA 931 931A Photomultiplier Vacuum Tube Voronezh Girls Vocal the centering pin is missingThis RCA 931A photomultiplier tube could not be tested and are sold as is. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS UP TO $250 IN VALUE. IF AN ITEM IS