4 US-Made Number Type 43 #43 Vacuum Tubes Lot Of Four Photo multiplier It tests below the cusp

It tests below the cusp

This lot of four Sylvania 12Q7GT tubes tested to spec on our Paul Hart-calibrated TV7/U

Plates: gray ladder plate

They have Y5E and 9-22 codes

As I write

4 US-Made Number Type 43 #43 Vacuum Tubes Lot Of Four Photo multiplier It tests below the cuspThis lot of four US made type 43 tubes was tested our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: 40, 59, 62 and 76 where minimum (65%) is 58 and 100% is 89. 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