3 Philco 12K7 12K7G Vacuum Tubes Valves NOS NIB Shoulder ST Style Lot Of Three Compactron T40 T52 Transconductance measured 62 for Tube

Transconductance measured 62 for Tube One and 64 for Tube Two where minimum (65%) is 40

6 milliamps

These tubes have acid-etched codes and designations as well as silk-screened 68-26 188-5 67-50 production run/provenance codes

Date Codes: 1-43 and NK

These matched pair of engraved-base

3 Philco 12K7 12K7G Vacuum Tubes Valves NOS NIB Shoulder ST Style Lot Of Three Compactron T40 T52 Transconductance measured 62 for TubeThis lot of three new old stock, new in box Philco 12K7G tubes tested to spec on our Paul Hart calibrated TV7 U. They have shoulder Coke bottles and are perfect for the restorer who wants absolute historical accuracy. 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