National Union NU 1N6 1N6G Vacuum Tube NOS NIB Stereo LP IM 37823

National Union NU 1N6 1N6G Vacuum Tube NOS NIB Stereo LP IM 37823This new old stock, new in box black plate National Union 1N6G tube tested to spec on our Paul Hart calibrated TV7 U. 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 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION

They measured 26 and 28 where minimum (65%) is 22 and 100% is 40

RCA-MANUFACTURED) where new/nominal is within one standard deviation of 1900

new in box Tung-Sol 6SD7GT pentode tested to spec on our Paul Hart-calibrated TV7/U

new in box Sylvania 12AB5 tubes tested to spec on our Paul Hart-calibrated TV7/U

As I write

This Sylvania 1629 / VT-138 milspec magic eye indicator tube tested very well on our Paul Hart-calibrated TV7/U

It is dead quiet when the preamp is muted and has excellent frequency response and dynamics even though it tests poorly

Transconductance measured 56/56 for Tube One and 58/58 for Tube Two where minimum (65%) is 25/25 and 100% is 38

It measured 32/27 where minimum (65%) is 18/18 and 100% is 28/28

It was made in Germany

new in box Westinghouse 7A8 tubes tested to spec on our Paul Hart-calibrated TV7/U

Detector and First Audio 12AV6