6 US-Made 5U8 Vacuum Tubes NOS NIB Lot Of Six 6BW4 NOS NIB 36/12 and 37/13

36/12 and 37/13

Transconductance measured 50/52 for Tube One and 53/52 for Tube Two where minimum (65%) is 25/25 and 100% is 39/39

Both tubes measured 29 where minimum (65%) is 22 and 100% is 34

Transconductance measured 7240 micromhos for Tube One and 7270 for Tube Two

new in box Raytheon 40KG6 tube tested to spec on our Paul Hart-calibrated TV7/U

6 US-Made 5U8 Vacuum Tubes NOS NIB Lot Of Six 6BW4 NOS NIB 36/12 and 37/13These six US made 5U8 tubes 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 VALUE. IF AN ITEM