4 US-Made 12SC7 Vacuum Tubes Lot Of Four US-Made NOS NIB These eleven US-made number /

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

They have engraved / hot-stamped bases on is Champion-branded and the other is Zenith

THERE IS A

This was originally a package that contained five and two have been used

This lot of four US-made black glass as well as gray glass number / type 57 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

4 US-Made 12SC7 Vacuum Tubes Lot Of Four US-Made NOS NIB These eleven US-made number /These four US made 12SC7 tubes tested as follows on our Paul Hart calibrated TV7 U: 27 23, 30 22, 32 38 and 33 36 where minimum (65%) is 25 25. 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.