International Servicemaster 6HG8 ECF86 Vacuum Tube NOS NIB Transleteronic new in box black plate

new in box black plate CBS-Hytron 6W4GT tested to spec on our Paul Hart-calibrated TV7/U

There were no shorts or gas and it measured 42 where minimum (65%) is 26

new in box Amperex-MANUFACTURED

Where the labeling took place is anyone's guess as the Raytheon-branded tube is stamped "England" while the Ameco tube claims to have been made in the USA

dark gray rounded plates and excellent flashing

International Servicemaster 6HG8 ECF86 Vacuum Tube NOS NIB Transleteronic new in box black plateThis new old stock, new in box Japanese International Servicemaster 6HG8 ECF86 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