4 Westinghouse 6S4 6S4A Vacuum Tubes Valves NOS NIB Lot Of Four T19 Transconductance measured 74 for Tube

Transconductance measured 74 for Tube One and 76 for Tube Two where minimum (65%) is 58

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

crenelated rectangular mica spacers

These tubes have narrow 19 MM plates

new in box Sylvania 9JW8 / PCF802 tube tested to spec on our Paul Hart-calibrated TV7/U

4 Westinghouse 6S4 6S4A Vacuum Tubes Valves NOS NIB Lot Of Four T19 Transconductance measured 74 for TubeThis lot of four new old stock, new in box Westinghouse 6S4A 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