Sylvania 6BL8 ECF80 Vacuum Tube NOS NIB Find 2022 tube

Sylvania 6BL8 ECF80 Vacuum Tube NOS NIB Find 2022 tubeThis 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

59-13 188-5 and 57-26 188-5 date/factory codes

Their readings are 61

a phi-shaped

Tube Four: 42

This Raytheon 30KD6 tube tested to spec on our Paul Hart-calibrated TV7/U

There was no gas

Transconductance measured 59 for both tubes where minimum (65%) is 40

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

They have gray

rounded rectangles