Matched Pair General Electric GE 6CL6 Vacuum Tubes Black Plate NOS-Testing VT107A Sixsnsevengt They have engraved / hot-stamped

They have engraved / hot-stamped bases on is Champion-branded and the other is Zenith

new in box matched pair of GE 6SJ7s was tested on our Paul Hart-calibrated TV7 for shorts

6SL7s can sub for 6SN7s in some amps but I do not recommend experimenting as they have very-different bias voltages

This lot of three US-made 7F7 tubes was tested on our Paul Hart-calibrated TV7/U and measure as follows:

Matched Pair General Electric GE 6CL6 Vacuum Tubes Black Plate NOS-Testing VT107A Sixsnsevengt They have engraved / hot-stampedThis new old stock testing matched pair of GE black plate 6CL6 tubes were tested on our Paul Hart calibrated TV7 7 for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 52 and 53 where minimum (65%) is 30. 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