5 RCA 12AF3 Vacuum Tubes NOS NIB Sleeve Of Five February 14 2023 US Army Signal Corps SC278A

US Army Signal Corps SC278A contract codes and two additional support rods per tube for increased rigidity and lowered microphonics

Two are available initially

This matched pair of 8FQ7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

GE-BRANDED 40KG6A / PL509 tube tested to spec on our Paul Hart-calibrated TV7/U

new in box (for Tube One) matched pair of RCA 6AK5 tubes was tested on our Paul Hart-calibrated TV7/U tester for shorts

5 RCA 12AF3 Vacuum Tubes NOS NIB Sleeve Of Five February 14 2023 US Army Signal Corps SC278AThis sleeve of five new old stock, new in box RCA 12AF3 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 COVERS