[R-390] R390 Newbie Support Info doc updated

[Larry Haney]

I've updated the subject document on our website to show:
1. Fair Radio closed
2. Surplus Sales is out of the female MB connector
3. Added summary to show tech refs that are online searchable
4. Updated info on Western Historic Radio Museum (Radio Boulevard)

Here's a link to it: R390 Newbie Support Info.pdf
<https://www.r-390a.net/R390%20Newbie%20Support%20Info.pdf>

Regards, Larry