Hello all, Yesterday, I brought my PDP8/a (with core memory) back to life, I got from our institute. It works, although the fans and the console panel (the plastic part, not the electronics) are missing. Now, what are the voltages of the fans ? I suppose that they're working with alternating current. They've to be replaced (somebody apparently "needed" them...). On the power supply, there is a dead thyristor/SCR in the 5 volt regulator circuit. As the machine works fine without it, I suppose that its function is to prevent high voltages, am I right ? So far, thanks alot for any help in advance ! Pierre ____________________________________________________ Aufnehmen, abschicken, nah sein - So einfach ist WEB.DE Video-Mail: http://freemail.web.de/?mc=021200