3 Lansdale 12AU7 / ECC82 Vacuum Tubes 17MM Black Plates Copper Support Rods Early Production Lot Of Three Organ Music These tubes have tall bottles

These tubes have tall bottles

This gilt-edge

This pair of Tung-Sol type 76 triodes was tested on our Paul Hart-calibrated TV7/U for shorts

-- GE 6L6GC output tube was tested on our Maxi-Matcher with 400 volts on the plates and a bias of -48 volts for shorts

2 milliamps' plate current while Tube Two drew 40

3 Lansdale 12AU7 / ECC82 Vacuum Tubes 17MM Black Plates Copper Support Rods Early Production Lot Of Three Organ Music These tubes have tall bottlesThis lot of three Lansdale (Philco's in house tube manufacturing arm) 12AU7 ECC82 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They measured 50 68, 58 72 and 65 66 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 date codes. This is an early production 12AU7 not a 12AU7A