I've been working on my PICStep clone, and am having lots of issues with oscillation. I'm using 20Mhz crystals with a couple 27pf caps. I found that on one I needed a 1M resistor in series with OSC2, but I think it's still somewhat noisy. On the other I made, I can't get it to run stable. It sort of runs if I put my finger on the cap connected to OSC2.

I realize that most people use ceramic resonators (which I wish I could find), but I woud like to know why I can half-ass get the crystal to work.

Anything obvious? Unfortunately I don't own a scope, so I can't really see what's coming out.

My electronics knowledge is scattered, so this falls outside my realm of knowing what to try next. :drowning: