[Boatanchors] question

[WA5CAB at cs.com]

Bob,

There are two models of what the great unwashed sloppily call 390's, the 
R-390/URR and the R-390A/URR.  Despite the fact that the front panels are similar, 
there are numerous and significant mechanical and electrical differences 
between them.  

In self defence, those who know the difference fell into the habit of tacking 
on the "non A" to make sure that anyone else who knew the difference would 
know that they were talking about the rather scarce early model and not one of 
the millions of R-390A's.

In a message dated 3/11/2007 10:40:52 PM Central Standard Time, 
youngbob53 at msn.com writes: 
> What in the hell is a 390 non A? I have never heard of that model. I have 
> an 
> R-388 which is a military version of a 51-J3 non J4-non-J2- non-J1, but the 
> 390 non-A? never heard of it.

Robert Downs - Houston
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