4 Philco Number Type 27 #27 Vacuum Tubes Stamped / Engraved Bases Lot Of Four 3rd Quarter BW40 Tube One: 31

Tube One: 31

excellent flashing and what appears to be a US Navy logo on the base

This lot of four Tung-Sol 6AC7s was tested on our Paul Hart-calibrated TV7/U for shorts

This new old stock-testing matched pair of RCA 6BL7GTA dual triodes was tested on our TV7/U for shorts

beefy black plates: three mica spacers for improved mechanical stability and low microphonics

4 Philco Number Type 27 #27 Vacuum Tubes Stamped / Engraved Bases Lot Of Four 3rd Quarter BW40 Tube One: 31These four Philco engraved base number type 27 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas; and they measured as follows: 40, 41, 42 and 44 where minimum (65%) is 25 and 100% is 38. 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