Raytheon Number / Type 41 #41 Vacuum Tube Black Plate Clear Bottle Engraved Base NOS-Testing Special Director's Transconductance measured 46 for Tube

Transconductance measured 46 for Tube One and 48 for Tube Two where minimum (65%) is 40

This lot of three US-made type 42 tubes was tested our Paul Hart-calibrated TV7/U for shorts

new in box RCA 6E5 magic eye indicator tube is nice and bright

(New Russian EL84s typically test from the mid 20s to mid 60s with transconductance from 5000 micromhos

Raytheon Number / Type 41 #41 Vacuum Tube Black Plate Clear Bottle Engraved Base NOS-Testing Special Director's Transconductance measured 46 for TubeThis new old stock testing Raytheon number type 41 tube tested 61 on our Paul Hart calibrated TV7 U where minimum (65%) is 40 and 100% is 62. It has an anode radiator for cooler operation and longer tube life; an engraved base; black plates, a clear bottle; a dimple sheet getter and outstanding 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