[R-390] Re IF Deck Product Detector Add On

[Kenneth Arthur Crips]

There have been discussions on this list for years about adding a product 
detector to an R390A.  My feeling is why bother with it.  The R390 series 
are all fine radios but for whatever reason they didn't build them with 
product detectors.  As you know I have the Eldico Electronics SBA-1 SSB 
adapter this unit vastly improves the side band performance of My 1967 EAC 
R390A, it adds a notch filter and a good 2 watt audio amp.  If you want to 
improve the side band performance of the R390 get one of the many side band 
adapters that where made instead of modifying the receiver.  For SSB 
reception There are so many good receivers and transceivers out there with 
product detectors as part of their original design I can't see adding one to 
the R390A.

                                         Ken



Kenneth A. Crips Radio Station W7ITC
Cheyenne, Wyoming with The Chew Crew
Beezie, Chic', and Cowboy three
outrageous Irish Terriers.