Zenith 10T10 Vacuum Tube Valve NOS NIB

Zenith 10T10 Vacuum Tube Valve NOS NIBThis new old stock, new in box Zenith 10T10 tested to spec on our Paul Hart calibrated TV7 U. 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 PROBABLY HAVE IT. PLEASE

Tube One drew 14

new in box Sylvania 6B8 tube tested to spec on our Paul Hart-calibrated TV7/U

I HAVE HAD TWO OR THREE LESS THAN FIVE STAR REVIEWS OR HAVE LOST A CUSTOMER BECAUSE I REFUSED TO EITHER ISSUE A REFUND FOR A TUBE THAT WENT BAD AFTER IT HAD BEEN USED OR A BUYER KNEW NOTHING ABOUT TUBE REBRANDING AND CLAIMED THAT SOMETHING MADE BY TUNG-SOL AND BRANDED BY EMERSON WAS MADE BY EMERSON

The performance is excellent and heart-felt

This lot of three US-made 14B6 was tested on our Paul Hart-calibrated TV7/U for shorts

It measured a perfectly-balanced 75/75 where minimum (65%) is 50/50

They tested 48

Tube Two lacks most markings and I believe it was military surplus and had its markings removed as memories of the war were a little too fresh

These four US-made 6AB4 tubes tested to spec on our Paul Hart-calibrated TV7/U

This Radio Shack / Realistic 6AF11 tube tested to spec on our Paul Hart-calibrated TV7/U

They have 1-43 188-5 and 3-52 188-5 date/provenance codes

Transconductance measured 2020 micromhos for Tube One and 1630 for Tube Two