[R-390] RBM-3 receiver info?

[Barry Hauser]

Hi Randy (and gang)

What info do you need?

There was a site with more on it than these, but try 'em anyway.

http://www.globalconstruct.com/projects/AA8A/articles/rbm.shtml

http://www.antiqueradio.com/vinmilequip_Oct-00.html

The RBM -1 through -5 were very similar.  There is the 200-2000 KC version
and it's 2-18MC twin.  While they're built like WWII aircraft receivers --
black wrinkle finish on lightweight aluminum sheet, but they were supposed
to be for rough use, so came in a formed aluminum transit case that fit the
two side-by-side with a sealing lid that fastened down with a bunch of
thumbscrews.  Lots of accessories -- rectifier unit, control unit (for
switching between the two), dynamotor unit -- meant to be run from storage
batteries - with 2 dynos in it -- one for each rx.  Also a separate transit
case with a spare dynamotor and lots of room for parts -- similar to the
radio transit case, but not as deep.  Also, the transit case came with 3
legs.

The earlier units came with a scroll type notpad unit on the upper right.
Later ones replace that with a holder for separate pieces of paper or cards.

One of the two sites above shows the system set up.  These were WWI all
right.  But most I've seen appear to have been unused.  I suspect by the
time they mounted the three legs, fastened them, unscrewed the umpteen
thumbscrews, dropped the lid (which formed a kind of desk), hooked up the
jumpers from each radio to the control box -- which didn't fit in the
case -- ran the two cables to the dyno box (after unscrewing it's
thumbscrews - back and front, I think), hooked up the batteries to the dyno,
rigged the antenna, plugged in the headset -- the campaign was over and it
was time to pack it all up again.

Not a great deal on the WWW, but the usual sellers have the manuals.  You
may have to work from a different book.  Some of the manuals are combined --
RBM-1, -2, -3 in one volume.  If I'm not mistaken I've seen one that covers
all five editions.  Not aware of any downloadables.

So -- search under RBM-1 through -5

While we're waiting for some other thread to develop, I could provide a few
thousand words comparing the RBM's to R-390's.  But, then again, maybe not.
;-)

Barry




----- Original Message -----
From: <R390rcvr@aol.com>
To: <r-390@mailman.qth.net>
Sent: Monday, March 15, 2004 9:14 PM
Subject: [R-390] RBM-3 receiver info?


> Good evening all:
>
> I am trying to find some information on this receiver. I have done
multiple searches for it on the web.  The other number associated with it:
CCT-46076. It is a 200-2000 KC receiver, probably WWII vintage. This
particular one was built by Stromberg Carlson.
>
> Any info or leads would be appreciated.
>
> Thanks
>
> Randy Stout
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