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I did make progress by turning the audio down. Power dropped from 7 to 4 watts but the undesired dropped significantly and the desired increased. Then made a 500 mile FT8 contact with the 4 watts. I

Are you using stereo headphones? If you have a mono plug in the jack your shorting the audio to ground. You need to use a TRS plug in the jack supplied with the UBITX. Skip Davis, NC9O

Allen? I AM 70. I like the challenge...keeps me sharp. I've decided I want built-in USB and the fear of RFI problems is a challenge I'm willing to take on. There are numerous RFI sources in the

Update: Things are happening fast and I'm trying to keep it straight in my old head. Is this list complete relative to the various "Raduino" versions available today ? I may have left some off.......

Evan, the WX labeled audio chips can blow out if the voltage going to them is beyond their tolerance? If you had the volume pot wires switched, then you may have blown out the chip as soon as you put

Gary, I double checked that shortly after posting, and swapped the orange and yellow wires on the pot. Still, no dice.

There has been issues with the wire-up documents, and I haven't kept up with the changes, so I may be wrong here. but it looks like your yellow and orange wires are swapped on the audio gain pot. Some

If you need phase information for a digital ham mode you can generate IQ locally in the baseband audio signal from the uBitx with the Hilbert Transform. Like in those old telephone modems. There may

That was my understanding, reading between the lines in Jack's post: ? ??/g/BITX20/message/49882 I could be wrong. Much of what they are doing could be done in a form factor to

Hey, I'm new here. I just finished assembling my ubitx, and I was disappointed to find there was no audio. I double checked all my connections, and everything seems to be wired correctly. I saw

Has anyone measured the bandwidth of the uBITX filter ??? I have tried it two ways. one with a SA/TG at the 12 mhz filter, and another by feeding in a audio tone from 200 hz to 2800 hz into the mic

That's the other way to do it. This JackAl board is just sampling the audio that we normally hear when listening to the radio. I'd call them both "SDR". Some may disagree. Jerry

Nope. Often in SDR, they use the I and Q channels to retain information regarding the phase of the local oscillator vs the incoming signal, this is then used digitally in the computations to

Yes Ron, The SDR implementation needs an additional quadrature sampler, from reading the documentation the rest of the hardware is already there in the uBitx.

I need some education... Don't you need i+q signals for SDR? rOn

Hello Bo, Have you checked the volume level you are feeding the uBitx? The mic amp isn't expecting more than 40mV. Also did you have any attenuation turned on the ICOM? The manual says it has settings

The Teensy 3.6 has a floating point unit and can do FIR filtering and more at that sample rate with the audio library. So the IIR filters used here, which are at least an order of magnitude more CPU

I think I may be confused or missing something. Why use usb on blue pill. Like I have always used stlink or ftdi ? to program with . If using usb to communicate with could you not just cut the 5v

Sounds like somebody just made a wild guess at how wide. Or didn't have some of these other issues fully figured out. Did anybody ever evaluate the failure? A skinny trace with feedthroughs such that

I've made some successful contacts on FT8 and WSPR using my Raspberry pi and posted a guide on how to do it. However, monitoring its output on my Icom 7300 I see: ubitx freq 7074.0,? audio