June 2024
This is a project that has evolved over the last year or so. It started out as an audio squelch circuit for my IC-7100 because the audio coming out of the accessory jack isn’t squelched. When I decided to make a PC board for it, I decided that I might as well bring out a few other useful signals.
After bringing out some of the signals, I thought that it might be a product people would be interested in. So I created another board iteration. That led to the decision that I might as well bring out all of the documented signals and support the the major Icom accessory connector standards.
I will be putting these up for sale on the store shortly. Of course, you are welcome to use the schematic and make your own if you prefer. Initially I plan to sell just the bare board and make a 3D printed box design available. At the time this is being written, I’m looking for sources of male-to-male DIN cables. If there is enough interest, I will look at getting a custom enclosure designed.
Below is a PDF with a description of the board along with descriptions of all the accessory signals, a schematic and an image of the PC board.