I am using that very arrangement. However, I am using the Yaesu CT-39A cables since they were cheap and have the same mini-din connector. The xmit is not a problem since the same pin on the IC-910 is the same for either speed. However, I tied the 1200 and 96000 rx leads together and since you can't do both speeds at the same time, I found no problems with that configuration and no interactions. I am also using a DSP2232 that I use to use on my Kenwood TS711/811.

Reid, W4UPD

James Denneny wrote:

I would invite comments on a recent change to cabling my IC-910H with my AEA DSP-2232 TNC.

Until now, I have cabled the 910 main & sub data port sockets to the 2232 five pin din radio input port. The cable was made up using the 910 data socket 9600 bps convention. I did this in order to communicate with satellite BB services such as GO-32. Unfortunately, this convention does not support 1200 bps. I would need to swap cables in order to switch RX audio from data port pin 4 to pin 5 for 1200bps AFSK.

To get around this shortcoming, I am replacing the data socket cables with a cable using ACC port to connect with 2232. Icom manual says this should work for 9600bps FM mode or 1200bps FM/SSB modes.

Does anyone know whether using ACC port vs Main & Sub data sockets compromises anything?

Jim

K7EG

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Jim,

There is a similar but not identical issue with my FT-847. I have used two different approaches.

I used to run the leads, mostly in parallel except for the 1200 and 9600 baud outputs, to radio ports 1 and 2 on the DSP-2232. Switching the modem loaded automatically switched the inputs and outputs.

Since I started using sound card programs several years ago, I made up a simple ABC switch. DIN cables, jacks, boxes, and wafer switches are cheap at a good hamfest, and not that expensive at parts stores. Another trick for a selector, which I saw documented in QST, is to use a serial AB or ABED box which are cheap, and nearly free at a hamfest flea market. You can make up adapters, or install DIN sockets. All the wiring is at audio frequencies and is uncritical. A metal box for shielding is recommended!

Note that however you do it, the audio levels from the DSP-2232 are not constant when you change the modems. If you use the same radio port, you will need to provide some sort of means of equalization. I used some cheap trim pots in my switching box. If you use separate radio ports, you can set them individually using the DSP-2232 level controls.

Alan WA4SCA