3 General Electric GE 12BK5 Vacuum Tubes NOS NIB Lot Of Three

3 General Electric GE 12BK5 Vacuum Tubes NOS NIB Lot Of ThreeThis new old stock, new in box GE 12BK5 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 IN

Fortunately they are inert and don't affect the tubes's operation

There are five Sylvania 6N7 / 6N7 GT tubes in this lot

It may be for It may be for a Big Crown 7551 or some of the Pointer date models

OEM-BRANDED 6K6GT tubes were tested on our Maxi Matcher 2 with 400 volts on the plates and a bias of --48 volts for shorts

These 6K6s are the best-looking

67 and 74 where minimum (65%) is 53

These thre new old stock

a top O-getter

new in box National Union 7A8 tube tested to spec on our Paul Hart-calibrated TV7/U

This matched pair of RCA 6AK5 tubes was tested on our Paul Hart-calibrated TV7/U

It measured 50/46 where minimum (65%) is 40/40 and 100% is 62/62

This tube has horizontally-ribbed black plates