4 US-Made Number / Type 57 #57 Vacuum Tubes Lot Of Four Mullard PLEASE BE PATIENT FOR THE

PLEASE BE PATIENT FOR THE FIRST DAY OR TWO IF THE PACKAGE IS STILL MARKED AS "PRE-TRANSIT

crenelated rectangular mica spacers

There is a shield between the triodes for reduced cross talk

new in box and tested to spec on our Paul Hart-calibrated TV7/U

This lot of seven RCA industrial-grade 1852 (6AC7) tubes was tested on our Paul Hart-calibrated TV7/U for shorts

4 US-Made Number / Type 57 #57 Vacuum Tubes Lot Of Four Mullard PLEASE BE PATIENT FOR THEThis 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