Jeff Liebermann wrote:
On Tue, 15 Dec 2015 18:31:14 -0500, "Ralph Mowery"
wrote:

Sometimes I would make notes on the copies and leave them in the electrical
cabinet, or just write inside the cabinet with a marking pen.

What? You don't like my method of documenting changes?
http://members.cruzio.com/~jeffl/k6bj/K6BJ%20Repeater/slides/Documentation.html
I think it's been like that since at least 2001.

ha. Love the metal can transistor diagram. At least these aren't drawn on
paper bags or cardboard and then thrown away.

Incidentally, I use a special ink for the purpose, that fades to
invisibility in about a year. It helps keep the manuals nice and
clean.

They should make heated pens for writing on thermal paper.