3 Lansdale 12AU7 / ECC82 Vacuum Tubes 17MM Black Plates Copper Support Rods Early Production Lot Of Three Organ Music This pair of Tung-Sol type

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

engraved bases and narrow rectangular mica spacers

new in box Philco 12BA7 tubes tested to spec on our Paul Hart-calibrated TV7

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

3 Lansdale 12AU7 / ECC82 Vacuum Tubes 17MM Black Plates Copper Support Rods Early Production Lot Of Three Organ Music This pair of Tung-Sol typeThis 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