4 Sylvania 12Q7 12Q7GT Vacuum Tubes NOS NIB Lot Of Four US-Made NOS 6AS8 Transconductance was 1890 for Tube

Transconductance was 1890 for Tube One and 2000 for Tube Two where new/nominal is within one standard deviation of 1900

Please be sure your device has enough current to run them

(New US-made 6V6s typically test with plate current from the mid-teens to mid 30s with transconductance from 2300 micromhos or so

Tube One measured 95%/93% and 95%/94% for Tube Two

4 Sylvania 12Q7 12Q7GT Vacuum Tubes NOS NIB Lot Of Four US-Made NOS 6AS8 Transconductance was 1890 for TubeThis lot of four Sylvania 12Q7GT tubes tested to spec on our Paul Hart calibrated TV7 U. They are the new, straight bottle bottle variety. 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