Sylvania 12SK7 12SK7GT Vacuum Tube Valve NOS-Testing Mitch Miller This lot of four US-made

This lot of four US-made black plate 12X4 rectifier tubes measured 43/46

this unique -- and nicely-framed -- work of art captures the raw

new in box US-made 6KU8 tubes tested to spec on our Paul Hart-calibrated TV7/U

two Hytrons and one Sylvania

Sylvania 12SK7 12SK7GT Vacuum Tube Valve NOS-Testing Mitch Miller This lot of four US-madeThis new old stock testing Sylvania 12SK7GT tube tested 64 on our Paul Hart calibrated TV7 where minimum (65%) is 48. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONIAN GERMAN PACKAGING REGULATIONS AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH THEM WE NO LONGER SHIP TO GERMAN ADDRESSES. WE WILL HAPPILY SEND YOUR PACKAGE TO A NEIGHBORING COUNTRY OR MAKE SUITABLE ARRANGEMENTS. IN 2021 WE PURCHASED 150,000 VACUUM TUBES. IF IT'S NOT LISTED, WE