Lansdale 12AU7 / ECC82 Vacuum Tube Valve 17MM Black Plates Copper Support Rods Early Production 6CA7 Fat Boy The Hickok-tested 6AV5 tested 4200

The Hickok-tested 6AV5 tested 4200 micromhos where new/nominal is 3900

Tube One measured 55 while Tube Two measured 62 where minimum is 34 and new is 60

micromhos)

They have gray

Lansdale 12AU7 / ECC82 Vacuum Tube Valve 17MM Black Plates Copper Support Rods Early Production 6CA7 Fat Boy The Hickok-tested 6AV5 tested 4200This Lansdale (Philco's in house tube manufacturing arm) 12AU7 ECC82 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 77 71 where minimum (65%) is 56 56 and 100% is 86 86. It has shiny 17MM black plates; copper support rods; excellent flashing; a top slanted D getter and L1E or IJI date codes. This is an early production 12AU7 not a 12AU7A like most 12AU7s we see