4 US-Made Number / Type 57 #57 Vacuum Tubes Lot Of Four Mullard ETSY DOES NOT HAVE A

ETSY DOES NOT HAVE A SYSTEM IN PLACE FOR THAT YET

Transconductance measured micromhos with a plate current draw of milliamps

There is a shield between the triodes for reduced cross talk

This matched pair of RCA-Victor dark-gray glass 6K6GT tubes was tested on our Maxi-Matcher tube tester with 325 volts on the plates and a bias of -36 volts

crenelated rectangular mica spacers

4 US-Made Number / Type 57 #57 Vacuum Tubes Lot Of Four Mullard ETSY DOES NOT HAVE AThis lot of four US made black glass as well as gray glass number type 57 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They measured (from left to right) 28, 38, 39 and 42 where minimum (65%) is 31 and 100% is 48. 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