Up for consideration is a pair of Amperex 12AU7/ECC82 tubes with the Dutch Delta manufacturing codes. One is anAmperex Bugle Boy and the other one is an Amperex labeled Hewlett Packard. These are probably 1960's manufacture. They test good for emissions and transconductance on my Hickok 6000; no shorts, gas or any problems with these. Only $39.99 shipped and Pay Pal-ed to the Continental United States.
