Synchonous Detector / SSB Convertor
R-390 - SB-600 Receivers
I have built an additional limited quantity of the OH2GF inspired Synchonous Detector / SSB Converter for the R-390 and SB-600 Radios.

This unit is stand alone, it uses the 455Khz IF output supplied by the radio.  It also incorporates a small audio amplifier output for a local speaker.  It is self contained and requires no modificatioins to the radio.  Here is a link to the directions and the article that inspired my remake of the adaptor.
DEVICE INFORMATION

    Converter_picture
If you are interested in purchasing one, the price is $295, this includes the unit and a 12 power supply.  Postage is extra the unit weights 3 lbs.
Contact me at n3lll@kitparts.com ... tom