RCA Cunningham Radiotron Number Type 78 #78 Vacuum Tube Mesh Plate NOS-Testing Gebraucht 50B5 This Korean War-vintage tube has

This Korean War-vintage tube has US Army Signal Corps SC 402 contract codes and 1-44 date codes

This lot of three GE 12J5 triodes were tested on our Paul Hart-calibrated TV7/U for shorts

new in box Sylvania-MANUFACTURED 7X7 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box Raytheon 12K5 tube tested to spec on our Paul Hart-calibrated TV7/U

44 and 46 where minimum is (65%) is 36 and 100% is 55

RCA Cunningham Radiotron Number Type 78 #78 Vacuum Tube Mesh Plate NOS-Testing Gebraucht 50B5 This Korean War-vintage tube hasThis mesh plate RCA Cunningham Radiotron number 78 tube tested 54 on our Paul Hart calibrated TV7 U where minimum (65%) is 36 and 100% is 56. 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