Hi Eric. I suspect that the level of technical detail you are after is not something commonly available on the site. Sadly the one person who could have answered your question is sadly no longer with us.
Most people do as Richard suggests and buy a set that will hold a number of receivers in its memory.
I suggest you run the post for a while in case someone sees it.
There are much larger forums on the ‘net, I would try some of them?
Ashley