Sylvania 5BC3 Vacuum Tube Valve NOS NIB LowtechTwoo 7K Transconductance measured 57 for Tube

Transconductance measured 57 for Tube One and 58 for Tube Two where minimum (65%) is 58 and 100% is 89

This matched pair of RCA steel plate 6AK5 tubes was tested on our Paul Hart-calibrated TV7/U tester for shorts

On the TV7/U

Magnavox-LABELLED 6CW5 tube tested to spec on our Paul Hart-calibrated TV7/U

crenelated rectangular mica spacers

Sylvania 5BC3 Vacuum Tube Valve NOS NIB LowtechTwoo 7K Transconductance measured 57 for TubeThis new old stock, new in box Sylvania 5BC3 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 OF THE TUBES WE SELL ARE OVER 70 YEARS OLD. WE CANNOT GUARANTEE FOR FAILURES AFTER POWER UP AS THERE IS NO WAY TO DETERMINE