Lansdale 12AU7 / ECC82 Vacuum Tube Valve 17MM Black Plates Copper Support Rods Early Production 6CA7 Fat Boy It has rectangular mica spacers

It has rectangular mica spacers

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

This matched pair of milspec Chatham Electronics 6H6 / JAN-CAHG-6H6-WGT tubes was tested on our Paul Hart-calibrated TV7/U for shorts

micromhos)

double-D getters and steel support rods

Lansdale 12AU7 / ECC82 Vacuum Tube Valve 17MM Black Plates Copper Support Rods Early Production 6CA7 Fat Boy It has rectangular mica spacersThis 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