[R-390] R-390 gear train

[Don Reaves W5OR]

> The thing you don't want to do is get a first time tear down set up 
> with the expectation that you have failed if it takes you more than 
> an afternoon .....  Bob Camp

I have to laugh, and agree with this statement, Bob. Some guys do a complete
bare metal rebuild of the subject device within four hours after first
contact.  Others take a little longer.   

My projects tend to take *years* to complete, due to interruptions like
work, family, wars, pestilence, etc.  But completing a project you started
several years ago is especially satisfying, if for no other reasons than you
didn't lose any of the parts, and there aren't any screws left over.    :-)

Don