Lansdale 12AV7 Vacuum Tube NOS NIB Black Plate For Your Univalve 12FM6 Septal 2 milliamps while transconductance measured

2 milliamps while transconductance measured 2050 micromhos

Two end links are available

IF THERE WERE A TEST FOR FUTURE FAILURE

This GE 18A5 tube tested to spec on our Paul Hart-calibrated TV7/U

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

Lansdale 12AV7 Vacuum Tube NOS NIB Black Plate For Your Univalve 12FM6 Septal 2 milliamps while transconductance measuredThis 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