[R-390] R220-URR

[James M. Walker]

Oh Gee,
I have one, it works pretty good, after I refurbished the power
supply for the thing. I also have the manual, which is VERY
necessary if you intend to put the thing back into operation. I
think I even still have some pieces and parts extra. However like Roy
mine is NOW in storage, it works pretty good on CW never had it
on FM. But it was touted as the vhf version of the R-390, not true
I think they were referring to the weight. The unit uses a lot of 6BA6/5749
tubes in the IF chain. I remember buying a pack of 100 from some
guy up north so I could get mine running. got pictures only at:-->
http://eshop1.chem.buffalo.edu/R-220-VHF-RX.html

I would make the effort and look for the manual, if you need one.
Jim
WB2FCN

----- Original Message -----
From: <roy.morgan at nist.gov>
To: "mike Kana" <aa9il at sbcglobal.net>
Cc: <r-390 at mailman.qth.net>
Sent: Sunday, March 12, 2006 8:23 PM
Subject: Re: [R-390] R220-URR


> Quoting mike Kana <aa9il at sbcglobal.net>:
>
> > Hi All
> >
> > I recently picked up a Motorola R220/URR receiver.
>
> I have one here, and can report just a little bit about it:
>
> - It was used by the Army for presumably tactical base station use.
> - it covers something like 40 mc to 220 mc (I could be quite wrong on
this)
> - It has FM, AM, and I think CW modes
> - It is HEAVY, like about 80 pounds or so
> - It uses submineature tubes in the front end and oscillator sections, at
least
> one of which is moderately pricey now.
> - It has two odd tuning coils with ferrite slugs for RF front end tuning
(In my
> receiver, one of the slugs is loose from it's rod and I have no idea how
to get
> at the thing short of major dis-assembly and subsequent re-manufacture and
> perhaps difficult re-alignment.)
> - The connecting cable from the RF to IF sections, about 3 inches long,
has an
> odd connector, and of course must be there for the thing to operate.
> -The knobs on the thing are odd, I've seen them nowhere else.  I seem to
> remember something odd about them: some run on 1/8 inch shafts, or they
have
> locking mechanisms in them or some similar thing. I remember deciding that
> finding replacements for some missing on my radio would be most unlikely.
>
> - WARNING:  At least in the one I have, the bottom cover is made such that
> without the cover in place, the tips of the under-chassis tubes extend
below
> the frame, and can (did!) get broken by simply putting the thing on a
bench.
>
>    Any information would be
> > appreciated.
>
> Does that mean you have no manual?  I have one, but unfortunately, it
*may* be
> among the things that recently went to storage.  No telling when I might
see it
> again if that is the case.  I think I can get to my receiver farily
easily,
> though.
>
> Roy
> K1LKY
>
>
> Roy Morgan
> 7130 Panorama Dr.
> Derwood MD 20855
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