[R-390] What is the difference between 390 and 390A

[Kenneth G. Gordon]

Roy Morgan wrote:

> lot of aircraft flying over that way during the war.  Pictured are the Adcock
> directional antennas and racks of SX-28's.  That changed my mind about wanting
> one of these radios.

I've wanted one since I first used one in highschool. It belonged to our 
highschool physics department.

> 
> Now I have two, an A and an earlier one.  Both await overhaul, but I do 
> look forward to having one around and running well.  Then the radio an I 
> can grow older gracefully together.

Electric Radio magazine just had a really superb two-part article on 
restoring and enhancing the SX-28 and 28A. When I get mine, that 
article will be my main resource. It is very well written.

Ken W7EKB