[R-390] New Subscriber with questions

[Tony Martin]

Greetings to all from a brand spanking new subscriber.
I am the proud owner of an R390/URR, Collins, ser no.465.
As you might imagine, I'm full of questions and eager to
know and learn more about this wonderful receiver.

First and foremost in my mind is the question regarding
what is the normal way of dealing with the J108 balanced
antenna input jack?  I have nothing like that in my inventory,
in fact I don't even recall ever seeing anything that will
mate with it (although obviously there is!).  Is there an
adaptor (that is affordable) to adapt it to the standard
PL259? 

Was there/is there a cabinet enclosure for the R390 or is
rack mounting the only way to go?  This one has the dust
cover on the top, etc...no feet on cabinet...(suggestions)?

A quick check shows that all controls/meters work, and I am
assuming, "as they should".  Are there any recommendations
(initial DO's and DON'Ts for a newbie owner)?

While in the USAF, I never was fortunate enough to get the R390
at my "position", although they began arriving shortly before
I got out (1961).  So it has taken 40+ years for me to "UPGRADE"
from the beloved SP-600, but I finally made it! 8-)

I look forward to reading and learning more about the 390 now
that I have subscribed to this group.  

Thanks to all for your suggestions and patience.

Sincere 73

Tony Martin, W4FOA
Chickamauga, GA