Realistic Radio Shack Gold Clad 3V4 Vacuum Tube NOS NIB Grayston Burgess 53 and 54 where minimum

53 and 54 where minimum (65%) is 40 and 100% is 62

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

These four US-made 12SC7 tubes tested as follows on our Paul Hart-calibrated TV7/U:

pre-oil-embargo pressing and it sounds very good

new in box and tested to spec on our Paul Hart-calibrated TV7/U

Realistic Radio Shack Gold Clad 3V4 Vacuum Tube NOS NIB Grayston Burgess 53 and 54 where minimumThis new old stock, new in box Realistic (Radio Shack) Gold Clad 3V4 tube tested to spec on our Paul Hart calibrated TV7 U. It was made in the US, likely by GE. 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