Signals

What is a good cheap source of information about RR signals for sidings and blocks.

Appysou

I don’t know if this is what you’re looking for but it’s free. Can’t get any cheaper than that unless they pay you to read it.
http://www.ctcparts.com/about.htm

By the way

[#welcome] to the Forum!

Thanks. The price was right and the amount of information overwhelming. Thanks for the quick reply.