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Re: FT-847 Digital Modes

 

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Ooohhh I like that a lot. It’s similar to my first data interface except I used a USB sound card too and patched the transformed into it direct.

I take it you are using a 600:600 transformer and 1k:8ohm?

Also it looks like a 4N25 for the PTT line. If you look inside most sound card interfaces there is a similar design and $10 worth of parts but after a few LED’s it’s marketed for $100 which annoys me somewhat.?

? I’m not sure if your using a MAC or Linux but there is still the possibility of using Wine for VSPE but I’m really not a MAC man just Linux and Windows. I work a lot of satellite and trying to get the various programs tied into KISS 8100 port and Doppler shift and PTT together can only be achieved with VSPE. GreenCube springs to mind.

? I think I posted an image of my breakout board for just this reason but I will post it again. I needed 9600baud from the SCU17 but the SCU17 was never designed for the FT847 so had to design a breakout board to tap into the 9600baud data.

? Using two of these little boards I designed means I can simply move the 9600baud data to the 1200baud input to the sound card where before it wasn’t possible.

? I would suggest you could make a 9 pin version of this on vero or breadboard just for testing.


? Great thread this and it’s exploring the same issues I had many moons ago.?

I do have an original SignaLink SL1 without sound card and it does use either VOX or PTT depending on how you configure it. That’s where the extra $90 goes when you buy a commercial item as I’ve experimented with VOX and it’s fraught with small issues, especially with RF getting into the works.

De Spence G5STO

image0.jpeg


Sent while portable! please excuse typos.

On 25 Mar 2024, at 11:49, Tim Davis KJ4DHF via groups.io <kj4dhf@...> wrote:

?Hello Spence,

That is basically what I had to do to use this interface. I had to have access to to the RYS pin on the pc side of the CAT cable.
So I just I need to splice into the serial cable and tap the RTS pin from the PC to the opticoupler and ground. Then I made the cross over ( null modem) to the radio inside the project box going to the serial port on radio. Then just added the audio lines to the pc and radio.
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