Osgeld: You're not helping.

I didn't say I couldn't order it. I can. And I'm not in the US, as you could see if you read my Location in my little sidebar thingy on the post. It's just that I have no way of doing so until at least next Thursday, and I would prefer to isolate the problem before then. If it is the capacitor, I'll take it off my working board and replace the one in the working board later with a new part. However, I would like to know what comprises the rest of the sweep circuit before resorting to this, in case the answer /is/ in my pile of parts.