National Union NU 12BA7 Vacuum Tube Valve NOS NIB 6HM5 Septal I have played it in

I have played it in my Musical Paradise 301 MK 3 with an adapter (not included) as a 6SJ7 substitute and it sounds excellent -- airy with excellent dynamics and signal bandwidth

but followed the original score and was recorded in the latter 1950s

They measured 85 and 75

new in box GE 26HU5 tubes tested to spec on our on our Jackson 648

Kenton-LABELED 14BR11 tubes tested to spec on our Paul Hart-calibrated TV7/U

National Union NU 12BA7 Vacuum Tube Valve NOS NIB 6HM5 Septal I have played it inThis new old stock, new in box National Union 12BA7 tube 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 ITEMS UP