Lansdale 12AU7 / ECC82 Vacuum Tube Valve 17MM Black Plates Copper Support Rods Early Production 6CA7 Fat Boy new in box set of

new in box set of five US-made seven pin tubes to re-tube your All American Five set

It has rectangular mica spacers

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

Transconductance measured 19

Lansdale 12AU7 / ECC82 Vacuum Tube Valve 17MM Black Plates Copper Support Rods Early Production 6CA7 Fat Boy new in box set ofThis 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