Lansdale 12AV7 Vacuum Tube NOS NIB Black Plate For Your Univalve 12FM6 Septal Transconductance measured 82 for Tube

Transconductance measured 82 for Tube One (6AU6A) and 84 (6AU6) for Tube Two where minimum (65%) is 58

WE HAVE HAD A DOZEN LESS-THAN-FOUR-STAR REVIEWS OR HAVE LOST A CUSTOMER BECAUSE WE REFUSED TO EITHER ISSUE A REFUND FOR A TUBE THAT WENT BAD AFTER IT HAD BEEN USED OR A BUYER KNEW NOTHING ABOUT TUBE REBRANDING AND CLAIMED THAT SOMETHING MADE

This engraved base Zenith 25A6G tube was tested on our Paul Hart-calibrated TV7/U for shorts

2 milliamps while transconductance measured 2050 micromhos

Lansdale 12AV7 Vacuum Tube NOS NIB Black Plate For Your Univalve 12FM6 Septal Transconductance measured 82 for TubeThis new old stock, new in box Lansdale MANUFACTURED, GE LABELED 12AV7 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 38 39 where minimum (65%) is 21 21. This tube has black plates; a D getter; terrific flashing and L2E date codes. Lansdale was the manufacturing arm of Philco and sold tubes to other companies not only during the transition from tubes