6 US-Made 6GC5 Vacuum Tubes Valves Lot Of Six Gray Glass It is somewhat microphonic

It is somewhat microphonic

new in box Raytheon 1032 / CK1032 is one of the strangest tubes I've ever seen and I have no idea how to test it

Transconductance measures the efficiency of a tube and also serves as a tube life measurement proxy as tube efficiency diminishes with age

IT IS YOUR RESPONSIBIILTY TO INTERACT WITH YOUR CUSTOMS AND POSTAL AUTHORITIES TO FIND THE PACKAGE

Transconductance measured 44/45 for Tube One and 45/45 for Tube Two where minimum (65%) is 25/25 and 100% is 38

6 US-Made 6GC5 Vacuum Tubes Valves Lot Of Six Gray Glass It is somewhat microphonicThese six 6GC5 tubes were tested on our Paul Hart calibrated TV 7 U. They measured 52, 62, 63, 67, 68 and 69 where minimum is 45 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