National Union NU 6Y7 6Y7G Vacuum Tube Valve NOS NIB Shoulder Coke Bottle Style 7771 new in box National Union

new in box National Union 14X7 -- and another just like it -- tested to spec on our Paul Hart-calibrated TV7/U

58 and 67 where minimum (65%) is 48

I will establish that parameter

Bass is excellent and very deep

This lot of two Philco new old stock-testing Majestic gray and silver bottle type / number 38 tubes tested 44 and 49 on our Paul Hart-calibrated TV7/U where minimum (65%) is 26 and 100% is 40

National Union NU 6Y7 6Y7G Vacuum Tube Valve NOS NIB Shoulder Coke Bottle Style 7771 new in box National UnionThis new old stock, new in box National Union 6Y7G 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 COVERS ITEMS UP TO