4 US-Made 12X4 Black Plate Vacuum Tubes Valves Rectifiers Lot Of Four 6EM7 Octal but with some wear

but with some wear

This matched pair of General Electric / GE 12SN7 12SN7GT dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

Plates: black ladder plate

5 standard deviation of 4000 micromhos

The Zenith is hermetically-sealed and could not be tested

4 US-Made 12X4 Black Plate Vacuum Tubes Valves Rectifiers Lot Of Four 6EM7 Octal but with some wearThis lot of four US made black plate 12X4 rectifier tubes measured 43 46, 44 44, 45 49 and 48 48 on our Paul Hart calibrated TV7 U where minimum (65%) is 40 40 . They have black plates; crenelated mica spacers and excellent flashing. 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