National Union NU 1N6 1N6G Vacuum Tube NOS NIB Stereo LP IM 37823 This Sylvania 1629 / VT-138

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

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

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

As I write

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

National Union NU 1N6 1N6G Vacuum Tube NOS NIB Stereo LP IM 37823 This Sylvania 1629 / VT-138This 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