Zenith 6LF6 Vacuum Tube GM Gebraucht These five GE 6SF7 tubes

These five GE 6SF7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

gold pin 7AU7 dual triode was tested on our TV7/U for shorts

Both tubes have thin cracks in their bases

Both tubes measured 30 where minimum (65%) is 22

GE-LABELED 12AV7 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

Zenith 6LF6 Vacuum Tube GM Gebraucht These five GE 6SF7 tubesThis Sylvania MANUFACTURED, Zenith LABELED 6LF6 tube tested 70 on our Paul Hart calibrated TV7 U where minimum is 54 and new is 100. 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