You can "pull" a 27 MHz crystal (a few tens of KHz at most), but that won't work with these integrated oscillators. They only have three functional pins: +5, Gnd, Out... Anyhow, while searching the junkbox for something completely unrelated, I found a 30.000 MHz oscillator can. From the previous discussion I figured it'd be worth a try... I tacked it in place and voila - the RUN light lit briefly, and ODT promptly came up to the "@" prompt! :) I can examine and change locations so at least the CPU and console port are working. If anyone's got a short RAM test program I can key in via ODT I'd appreciate it. The RAM is a Clearpoint card that appears to be 2 Mbytes/1 Mword. (I don't know PDP-11 assembly language, or machine code, so it's time to get out the manuals!) Also the Fault light on the RL02 is still on, don't know if the problem is in the drive or the RLV12 card yet. Guess I can swap the other RL02 (working on the 8/A) and see what happens... -Charles