[R-390] Yard sale find

[EVELAND, GEORGE COL RET USA]

Mark,

MWO stands for "Modification Work Order"....is basically the date that a modification was approved for the receiver.  The stamp or a sticker on back is evidence that this modification was applied.

Quite common--especially on stuff that's been in service for sometime.  

73's 
Geo 
W8VG

George D. Eveland, Jr.
Colonel, Signal Corps
United States Army (Retired)
Space Programs Directorate, 
OASD(NII), 703-607-0742
Room 7061A, Crystal Mall 3
Alexandria, VA  22202

----- Original Message -----
From: Mark McNulty <noggie1999 at yahoo.ca>
Date: Wednesday, September 16, 2009 21:39
Subject: [R-390] Yard sale find
To: r-390 at mailman.qth.net


> Hi Everyone,
> 
> I found an R-391 at a yard sale on the weekend, its in very good 
> condition. serial number 20, order number 21852-PH-50-93. There is 
> a stamp on the back that says MWO SIG 191 JULY 20 1955. When I 
> first seen the radio I thought this was the build date, but by the 
> order number it would have been built in 1950, would this be the 
> date it was put in service? I don't know anything about radios, 
> but when I seen it I said to myself  "this looks like a serious 
> piece of equipment". I had just bought my first shortwave radio a 
> few weeks prior, a Blaupunkt Paris, so I asked the fellow what he 
> wanted for it and he said forty dollars. I looked at it for a few 
> seconds and in my infinite wisdom walked away, as I was leaving I 
> heard him yell out make me an offer, so I said twenty dollars 
> and the rest is history. When I went home and looked it up on the 
> internet I was shocked! It never came with a power cord but I am 
> going to go back this weekend and see if he has it
> somewhere. Any advice on starting it up? I assume I should have 
> it professionally checked before powering it up? Thanks in advance.
> 
> Mark
> 
> 
>      
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