I noticed you were missing the Aberystwyth North Road relay from your list of sites, and as I've walked past it many times as a student, I thought I'd get a few shots when I next returned.

The mast is on a small road behind the old North Road Hospital site, about halfway up the hill. It serves the parts of the town that can't see Blaenplwyf because of the large hill called Pendinas [see last photo].