Raspberry pi and ubitx FT8 setup? ?Bo Barry 5/20/18 first draft
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NOTE:?
The AGC and pop mods are not needed for digital mode. You operate with AGC
off and adjust the audio signal level with the volume control.
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The pop isn't noted if you don't have headphones on! :)
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USB sound cards don't like the DC on the mic input. Use a 1uf cap.
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Remove the orange wire (the PTT line on the mic jack.?
The sound card puts audio on it! PTT is not needed for digital)
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Enter aplay -l to see if the USB card is device 1 If not, the following is not helpful. :)
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If so edit or create the ~/.asoundrc file to look like this.
Note: ~/ means it goes your home directory and the . indicates it is a hidden file.
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pcm.!default {
? ? ? ? type hw
? ? ? ? card 1
}
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ctl.!default {
? ? ? ? type hw
? ? ? ? card 1
}
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A reboot is needed for this to take effect.
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To get sufficient volume out from the USB sound card I had to install the pimixer program: sudo apt-get install pimixer
Set it up and move the sliders to maximum.
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After this I had a clean input signal to the ubitx and the RF output looked good on a scope.
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Badly needed is a meter/indication of the audio input level to the mic.?
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I'm using one of the USB sound cards that has a button and volume control on it.
Be sure to tap the button to turn on its audio output!!!
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Be sure to power on the ubitx and connect the USB cable to the ubitx, plus the USB sound card, BEFORE power on the Raspberry pi
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Set the rig to Yaesu 817, 38400 baud, 8 data bits, 2 stop bits? no handshake,?
CAT Control to /dev/tty/USB0, PTT mode to CAT, USB mode (important), & None
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When you select your sound source in WSJT-X, you simply pick the default option. No worry with all the options.
Check the audio ports. They should be sysdefaultCARD=Device
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You can get the WSJT-X program for the Raspberry pi at https://physics.princeton.edu/pulsar/k1jt/wsjtx.html
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Let me know if you find this helpful!!? ?Bo W4GHV
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