The nice thing about this is it's super simple, much faster than a mechanical relay and is opto-isolated.
I had ordered some parts for another project a while back, part of which was to rebuild the keying interface so I could key two devices. That project got shelved, but today I decided to rebuild the interface as originally planned since I had the stuff to do it.
Version 1 (with the heat shrink removed):
I had this hanging out the back of the rig, that was ok.
Only the orange and grey wires are used from the Icoms pigtail, the rest are just tucked out of the way.
The solid state switch's control voltage is 3 to 10V, but work ok from 12V. With two of them I wired them series for use with the rigs accessory jack which supplies 12V when keyed. With this I can independently key two separate devices with a closing current of 3A at up-to 60V each.
Parts I used:
- Project box is a "Zulkit Waterproof Plastic Project Box ABS IP65 Electronic Junction box Enclosure Black 3.94 x 2.68 x 1.97 inch (100X68X50mm) (Pack of 2)", from Amazon. I have found it quite difficult to find good project boxes.
- DIN plug and pigtail came with my IC-7300, I simply cable tied once for strain relief and a second time looping it through two small holes I drilled to stop the cable from rotating. This secured it nicely since I didn't have anything better on hand.
- Solid state relay is a Crydom DMO063, Mouser part # 558-DMO063. Can also be found on Amazon, and other places.
- Barrier Terminal Blocks TERMINAL STRIP 6 LUG, Mouser part # 158-1006.
- RCA Phono Jack, Mouser part # 490-RCJ-032.