RCA EZ81 / 6CA4 Vacuum Tube Valve Rectifier NIB Lot Of Thirteen new in box US-made 6CY5

new in box US-made 6CY5 tubes tested to spec on our Paul Hart-calibrated TV7/U

(New EL84s typically test from the mid 20s to mid 30s with transconductance from 7000 micromhos

These two photomultiplier tubes could not be tested and are sold as-is

This album is excellent in all regards

new in box RCA 13GF7 13GF7A tubes tested to spec on our Paul Hart-calibrated TV7/U

RCA EZ81 / 6CA4 Vacuum Tube Valve Rectifier NIB Lot Of Thirteen new in box US-made 6CY5This Sylvania 6CA4 EZ81 rectifier tube was tested on our Paul Hart calibrated TV7 U. It measured a perfectly balanced 52 52 where minimum (65%) is 40 40 and 100% is 62 62. 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