Amperex 9ED4 Vacuum Tube NOS NIB May 29 2025 This tube has black plates

This tube has black plates

The Bottlehead calls for a 12AU7 which is a pretty-different tube

hydrofluoric acid-etched GE provenance dots and excellent flashing

This amp was designed to use 6SN7s and I do not recommend using 12SN7s

This Ken-Rad 1C77G tube tested to spec on our Paul Hart-calibrated TV7/U

Amperex 9ED4 Vacuum Tube NOS NIB May 29 2025 This tube has black platesThis new old stock, new in box Amperex 9ED4 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 COVERS ITEMS UP TO $250