General Electric GE 6688 Vacuum Tube Valve NOS-Testing RCA RC2 new in box US-made 6KU8

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

38 and 44 where minimum is (65%) is 36

All of these tubes have very-good-testing triodes and each has a strong-testing as well as a functioning diode

excised chevrons in their top mica spacers as well as 210 5439 and 5413 provenance/date codes

General Electric GE 6688 Vacuum Tube Valve NOS-Testing RCA RC2 new in box US-made 6KU8This GE 6688 tube tested 110% on our Jackson 648 Mutual Conductance tester. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONONIAN PACKAGING REGULATIONS AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH THEM WE WILL NO LONGER SHIP TO GERMAN ADDRESSES FROM JUNE 1, 2022. 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 PROBABLY HAVE IT. PLEASE