Sylvania 6BL8 ECF80 Vacuum Tube NOS NIB Find 2022 tube new in box milspec Tung-Sol

new in box milspec Tung-Sol JTL-5702WB tubes tested to spec on our Paul Hart-calibrated TV7/U

It measured an almost-perfectly-balanced 59/57 where minimum (65%) is 40/40 and 100% is 62/62

It measured a nicely-balanced 52/50 where minimum (65%) is 40/40 and 100% is 62/62

Their readings are 61

Sylvania 6BL8 ECF80 Vacuum Tube NOS NIB Find 2022 tube new in box milspec Tung-SolThis new old stock, new in box Sylvania 6BL8 ECF80 tube tested to spec on our Paul Hart calibrated TV7 U. It was made in the USA. 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