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

Matched Quad Sylvania 7B6 Vacuum Tubes NOS-Testing Gray Silver GlassThis 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

This Tung-Sol 13DE7 tested to spec on our Paul Hart-calibrated TV7/U

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

copiously-illustrated book is in excellent condition

Transconductance measured 41/42 where minimum (65%) is 21

Both have BW date codes

new in box Mullard-MANUFACTURED

ETSY MAY REIMBURSE YOU EVEN IF IT WAS STOLEN

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

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

This Silvertone 5Y3GT black plate rectifier tube was tested on our Paul Hart-calibrated TV7/U for shorts