2 National Union NU JANCNU1203A VT243 7C4 Vacuum Tubes NOS NIB Milspec Lot Of Two RCA Drawer 52/34 and 56/47 where minimum

52/34 and 56/47 where minimum (65%) is 40/45 and 100% is 62/69

These six US-made 6S4A tubes were tested on our Paul Hart-calibrated TV7/U for shorts

This matched pair of Tung-Sol black glass 6K6GT tubes was tested on our Maxi-Matcher tube tester with 325 volts on the plates and a bias of -36 volts

black and silver bottles and 2-22 188-5 and 604 188-5 provenance/date codes

new in box Sylvania 5AM8 tubes tested to spec on our Paul Hart-calibrated TV7/U

2 National Union NU JANCNU1203A VT243 7C4 Vacuum Tubes NOS NIB Milspec Lot Of Two RCA Drawer 52/34 and 56/47 where minimumThese two World War Two vintage milspec JAN CNU 1203A VT 243 7C4 tubes tested to spec on our Paul Hart calibrated TV7 U. 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