[R-390] SSB unit

[Charles B]

Hi all,

someone told me that there's an outboard unit that allows 
one to receive LSB & USB better with his R-390A.  He said 
that it was made by Barker & Williamson.  Anyone know the 
email or URL of B & W?  I would like to investigate the unit 
mentioned.

thanks

Chuck
ka4prf at us-it.net