4 US-Made 14A7 Vacuum Tubes Valves NOS NIB Lot Of Four ECC83 Art Sound Transconductance measured 50/52 for Tube

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

48 and 52 where minimum (65%) is 36 and 100% is 55

Silvertone-BRANDED 6K7GT tubes was tested on our Paul Hart-calibrated TV7/U for shorts

12SL7 bogey: Minimum (65%) is 32/32 and 100% is 49/49

IF A TUBE FAILS AFTER YOU GET IT

4 US-Made 14A7 Vacuum Tubes Valves NOS NIB Lot Of Four ECC83 Art Sound Transconductance measured 50/52 for TubeThese new old stock, new in box 14A7 tubes tested tested to spec on our Paul Hart calibrated TV7 U. Two are GE and two are Sylvania. 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