Sylvania 7B4 Vacuum Tube NOS NIB Robert Frost WE HAVE A VERY LARGE

WE HAVE A VERY LARGE SELECTION OF VACUUM TUBES

new in box 6SR7 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box RCA 1DG3 tube tested to spec on our Paul Hart-calibrated TV7/U

new in box RCA 6CG8A tubes tested to spec on our Paul Hart-calibrated TV7/U

Minimum (65%) is 32/32 and 100% 66/66

Sylvania 7B4 Vacuum Tube NOS NIB Robert Frost WE HAVE A VERY LARGEThis new old stock, new in box Sylvania 7B4 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 TO $250 IN