8 Philco 7B8 Vacuum Tubes Lot Of Eight Squares Circles This new old stock-testing GE

This new old stock-testing GE 5U4GB rectifier tube was tested on our Paul Hart-calibrated tube tester for shorts

It was also tested on our Maxi Preamp II (as a 12AT7) for shorts

One tube has far more visible getter flashing because of the getter's orientation deeper in the bottle

new in box GE 12DK7 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box GE 6AH6 tubes tested to spec on our Paul Hart-calibrated TV7/U

8 Philco 7B8 Vacuum Tubes Lot Of Eight Squares Circles This new old stock-testing GEThese eight Philco 7B8 tubes tested as follows on our Paul Hart calibrated TV7 U where minimum (65%) is 29 and 100% is 45: 30, 32, 36, 36, 38, 39, 40 and 42, respectively. 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