Mullard 13GB5 XL500 Vacuum Tube NOS NIB September 09 2023 OEM-BRANDED black glass 6K6GT tubes

OEM-BRANDED black glass 6K6GT tubes was tested on our Maxi-Matcher tube tester with 325 volts on the plates and a bias of -36 volts

This new old stock-testing RCA clear top 6CG7 / 6FQ7 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

They measured 46

IF IT'S NOT LISTED

Mullard 13GB5 XL500 Vacuum Tube NOS NIB September 09 2023 OEM-BRANDED black glass 6K6GT tubesThis new old stock, new in box Mullard MANUFACTURED, Sylvania BRANDED 13GB5 XL500 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