Sylvania 1629 VT-138 VT138 Indicator Magic Eye Vacuum Tube Valve Milspec Noval Plate Cap These four US-made 12SC7 tubes

These four US-made 12SC7 tubes tested as follows on our Paul Hart-calibrated TV7/U:

Tube One: 31

Or maybe not

These eleven US-made number / type 27 tubes tested below the cusp -- some far below

Sylvania 1629 VT-138 VT138 Indicator Magic Eye Vacuum Tube Valve Milspec Noval Plate Cap These four US-made 12SC7 tubesThis Sylvania 1629 VT 138 milspec magic eye indicator tube tested very well on our Paul Hart calibrated TV7 U. Its phosphors are nice and bright and it has terrific flashing. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHELEC" 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