RCA 1642 US Navy CRC-38233 Vacuum Tube Milspec Micanol Base 17KV6 Noval T37 Their internal structures are all

Their internal structures are all the same

This Amperex 8020 half-wave rectifier tube was tested on our Paul Hart-calibrated TV7/U

new in box RCA 6DW4B tubes tested to spec on our Paul Hart-calibrated TV7

new in box (for Tube Two) GE 12SN7GT dual triodes was tested on our Jackson 648 Mutual Conductance tester for shorts

RCA 1642 US Navy CRC-38233 Vacuum Tube Milspec Micanol Base 17KV6 Noval T37 Their internal structures are allThis milspec RCA 1642 dual triode was tested on our Paul Hart calibrated TV7 U. or shorts, gas and transconductance. There were no shorts and it measured a perfectly balanced 44 44 where minimum (65%) is 34 32 and 100% is 52 52. It has a micanol base; a D getter; US Navy markings 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