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I was playing with an up-to-date Zbitx a while ago, trying to chase CW stations calling in 20m and 30m and I noticed that after a few minutes of the kind of CW sending that is possible now (the timing

I noticed similar noise If i tune to any freq, I hear chugging noise. If i go to the menu or any where there is no waterfall displayed, the noise disappears. So for me it is the water fall causing

If you use the tinySA to look lower in frequency, you will also see a powerful MF band spur at around 2 to 2.5 MHz. The source for this signal is likely what's modulating the 5351 clock output. ?Any

Thank you so much for doing that research! one solution is series filters consider adjusting the idle current on the final Mosfets to see if that has any effect I wonder where the signal is coming

To find the root cause of the spurs, I worked in 2 steps: 1. I took the front panel board out of the case and connected it with jumper wires to the main board. My objective was to eliminate possible

I agree ... - I use self-adhesive copper tape to shield the lines. This also allowed me in the past to get the sBitx free of digital interferences. The HF signal transceivers all have the same

My batch2 ZbitX shipped today and delivery is expected friday according to DHL. -Dean

Ron, I have that same problem, in fact I would say every zBitx owner is having this problem. There are some on this group that think this might be the SPI serial interface updating the display and

If you have 807s and power transformers available then use what you have.? Tubes are almost unavailable here and unused.? I couldn't even give away a few 2E26 tubes - nobody wanted them. Gerry

Evan, Thanks for the advice. Jeff returned from vacation and I placed an order on his site for the board kit. Very quick response and Jeff shipped an assembled board as an upgrade. Outstanding

The exact same thing happens to me. I'm a Morse code operator, and proper CW operation is crucial to me. Since I'm not very good at updating firmware and modifying the radio, I don't mind waiting a

I think this effect is due to its very small size. Probably shielding would eliminate the problem. This could be aluminum or copper foil, which is insulated on both sides. Short circuits should be

Shirley, the problem and its suggestion arise from the fact that a piece of writing is missing from the shipping package, which draws attention to this. We, who regularly read the forum posts, know

I hear a pulsing noise from my zBitx speaker, even with a dummy load connected instead of an antenna, and both the audio volume and IF gain turn down. Seems to pulse or hum 3 to 5 times per second. Is

The reason that the zBitx is not supplied with a battery is because of shipping restrictions on lithium batteries. The shipping time would be much longer if the battery were included because it would

Michael, please note that the product is software published. So much so that if you don't modify it, there's no joy in using it. And which manufacturer publishes the CAD files? Then there would be a

The dependencies are in install.txt on github. The run will not happen without hardware because it will be missing the components connected to the GPIO pins for proper operation. The hardware is

Jim, Send us an email on sales at hfsignals dot com.? If you like we can hang on to your zBitx and ship it out? when you give us the green light or we can ship it to an alternate address if you

Don, The default password is hf12345. 73, Ragav

That's modem_next_sample in the above. You can read online about Flex cw keying issues in a $4500 radio. I have a Peaberry V2.?? David the designer actually wrote a little windows driver program