2 National Union NU JANCNU1203A VT243 7C4 Vacuum Tubes NOS NIB Milspec Lot Of Two RCA Drawer

2 National Union NU JANCNU1203A VT243 7C4 Vacuum Tubes NOS NIB Milspec Lot Of Two RCA DrawerThese 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

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

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

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

They have gray plates

WE HAVE A VERY LARGE SELECTION OF VACUUM TUBES AND VACUUM TUBE-RELATED ITEMS

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

It tested 54 in Section One and 54 in Section Two where minimum (65%) is 40/40

These tubes were made at the Owensburo

These tubes have banded phi-shaped mica spacers

new in box Sylvania 7A6 tubes tested to spec on our Paul Hart-calibrated TV7/U

They have 4-48 188-5 and 4-43 188-5 date/factory codes

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