Custom Cabling Solutions for Competitive Radio Amateurs
by Robert E. Naumann N5NJ
SO2R-1 Two Radio Switching System
Interfaces with most popular contest logging (CT, NA, TR, WriteLog) programs to switch your headphones, microphone, footswitch, and keyer between two radios to support "Single Op, Two Radio"(SO2R) operation. Also included is the ability to key your modern (positive keying) radios for CW transmission from a single LPT port on your computer.
Consists of two cabinets, one small unit that is to be located adjacent to your keyboard, and the other larger unit which should be located near the back of your two radios. A flexible multi-conductor cable connects the two cabinets.
On the small unit are 3 switches:
One low pressure, momentary pushbutton switch that swaps your headphones to the "other" radio.
A toggle switch that enables "stereo" listening - both radios, one radio to each ear
A toggle switch that manually switches between your two radios when not contesting
On the large unit are:
Individual Phono (RCA) jacks for each radio for CW keying, receive audio, PTT
6' Cables with a 1/8" plug to connect to a standard mic adapter on your radio mic socket
6' Cable to accept a standard 1/8" mic plug from your headset mic or other
6' Cable with a 1/4" stereo jack for your headphones
Cable to connect your computers's LPT port
Stereo Jack to accept the output of your CW keyer & paddle
Connection to your 12 volt DC supply
The schematic is included here:
Custom made by N5NJ in Plano, TX.
One year warranty.
This item is special order only. Please contact N5NJ for details of pricing and delivery.
Please email any questions to [email protected]
Robert E. Naumann
3568 Teakwood Lane
Plano, TX 75075-1752