Ken-Rad 6A7 Vacuum Tube Valve NOS-Testing 6BK4B Triode This tube has black plates

This tube has black plates

new in box milspec RCA 884 / JAN-CRC-884 / VT-222 tube tested to spec on our Paul Hart-calibrated TV7/U

Plates: gray ladder plate

THAT IS ALL I CAN DO

This new old stock-testing matched pair of Ken-Rad 6SJ7s was tested on our Paul Hart-calibrated TV7/U for shorts

Ken-Rad 6A7 Vacuum Tube Valve NOS-Testing 6BK4B Triode This tube has black platesThis Ken Rad 6A7 tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 61 where minimum (65%) is 29 and 100% is 47. 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