Matched Quad Sylvania 7B6 Vacuum Tubes NOS-Testing Gray Silver Glass Bases: tall

Bases: tall

new in box (for Tube One) matched pair of RCA 6AK5 tubes was tested on our Paul Hart-calibrated TV7/U tester for shorts

Date Codes: 1-43 and NK

This matched pair of Tung-Sol black glass 6K6GT tubes was tested on our Maxi-Matcher tube tester with 325 volts on the plates and a bias of -36 volts

Matched Quad Sylvania 7B6 Vacuum Tubes NOS-Testing Gray Silver Glass Bases: tallThis matched quad of new old stock testing Sylvania 7B6 tubes tested 1033 micromhos for Tube One and 1050 for Tube Two on our Hickok 800. Tubes Three and Four measured 1100 and 1150, respectively nominal is within a standard deviation of 1100. All four tubes' diodes tested fine as well. 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