Lansdale 12AU7 / ECC82 Vacuum Tube 17MM Black Plates Copper Support Rods Early Production Philips Nonal This new old stock-TESTING matched

This new old stock-TESTING matched pair of Tung-Sol 6K6GT tubes was tested on our Maxi-Matcher 400 volts on the plates and a bias of -36 volts for shorts

gray plates and bottom

This new old stock-testing Westinghouse 6X5GT rectifier tube was tested on our Paul Hart-calibrated TV7/U for shorts

Tube One measured 60 while Tube Two measured 70 where minimum (65%) is 46 and 100% is 71

Lansdale 12AU7 / ECC82 Vacuum Tube 17MM Black Plates Copper Support Rods Early Production Philips Nonal This new old stock-TESTING matchedThis 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 70 64 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 like most 12AU7s we see these