At 07:00 PM 12/10/2014, Kyle Owen wrote: I own a Hickok 533 and a few other testers, as well as a GR vacuum tube bridge, to ride herd on many vacuum tubes stocked for many vacuum tube instruments and antique radios. I don't get as sophisticated as working with 8s (though I did care for a couple of pdp-8/m systems 30 years ago), I just wrangle some electronics with dedicated microprocessors from the 8080/8085/Z80 family. Dale H. Cook, Roanoke/Lynchburg, VA Osborne 1 / Kaypro 4-84 / Kaypro 1 / Amstrad PPC-640 http://plymouthcolony.net/starcity/radios/index.html