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digital modes - how to connect computer line out

 

Direction connection from the ubitx speaker jack to the computer microphone input (windows10 works, and wsjt-x decodes FT8.??
Any suggestions on how to connect the line out (or headphone output) from a computer to the ubitx for? FT8 / wsjt-x???
 

I used a USB soundcard, more because my laptop has a combined audio port for speaker/microphone. But just two 3.5-3.5mm cables from the soundcard to the speaker and the microphone connector of the uBitX. Simple as that

John
KG5WJQ
Bo Barry
 

Or get one of the little audio adapters (4 conductors)? for the combined audio port that has two short cables. Also you need to lift the orange wire for the PTT. Audio cards don't like it. :) PTT done with CAT control works fine.
Bo W4GHV
 

We have a wiki page that shows one way to do it.

/g/BITX20/wiki/Digital-Setup
--

 

Thanks for the response guys. I wasn't sure about the signal levels of the electret mic and if I needed to bypass the preamp. But from Johns info figured it was not an issue. I opted for the direct route from headphone jack tip to mic input. Found out pretty quick that 1) a mono 3mm plug in the ubirx mic jack shorts the PTT to the mic with unpleasant results, and 2) a stereo plug with ring open was needed if I wanted to use the mic jack on the ubitx!? { a similar situation with?my mono 3mm plug on my straight key, hi}

With that out of the way, bringing up wsjt-x for transmit was easy - I think I mentioned that the receive was working fine.?

BTW that KD8CEC CAT over USB works awesome and seamlessly with wsjt-x.? Made a number of 40m FT8 qso's last night to JA and CONUS.? No luck on 20m or 17m today but maybe on the gray line things will be different. Now with a working baseline it gets interesting.

Bo - not familiar with a 4 wire adapter like you mentioned, newbie here.? Was hoping I'd find a schematic in the ubitx community, but didn't turn one up.? I ended up building an adapter with 3mm jacks and plugs to allow using the stock stereo jacks on the ubitx and stock 3mm stereo cables. This helped me to keep the cutting and hacking to minimum while I bring up the ubitx:).??

Once it's all working however ...?

Doug - I saw a reference to the Easy Digi board - wish I had one of those a few years ago when I was hacking on my FT-857 to make it play PSK ! :)? ?Keep it mind however, you never know.? If I had some of those transformers lying around I'd be tempted to try it, as you say, to get better receive isolation at least.

cheers for the responses! P


On Mon, Jun 4, 2018 at 12:22 PM, Doug W <dougwilner@...> wrote:
We have a wiki page that shows one way to do it.

/g/BITX20/wiki/Digital-Setup
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Bo Barry
 

It's called a TRRR connector for the new laptops and probably iPhone. 4 conductors. Mine has the plug and two short audio cables with 3 conductor plugs.

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