I'm wondering if this one needs to be added at the top of the first page now, Huw.

There are some nice manuals on there; and it seems to get called up a lot these days by Google* searches.

Meanwhile, the link to VIPmedinc seems to have died - RIP. frown

The GE link needs editing, too (see Post 73344).

* Other internet search engines are available.

By the way, if anyone else (besides me, that is) has "fond memories" of the Radio Shack booklets by Forrest Mims - well, you can find them again here. smile