开云体育

Finally took the plunge and bought one of those Ukranian 2m/70cm Transverters -- with the fancy MOSFET so it is supposed to do 10W on 2m. Eventual goal is to learn something about the linear translation satellites. Got it all connected up this afternoon. The attenuator inside the unit is way off from what they said it would be -- I have the sBitx at about 19% power level to avoid overdriving the transverter. I can't find my "normal" sBitx mic so having to use a CB amplified mic and a rube-goldberg set of connections.... but it works!! Made first 2m SSB and CW contact EVER in my life to friend who has a superb VHF / UHF setup about 11 miles away -- this with a homebrew 3 element beam made years ago from welding wire, laying between bannister and chair. The sBitx worked perfectly. The transverter only has "vox" and wouldn't stay "in" during SSB voice -- but others have added a ptt connection before and I should be able to also, since I already have a "send" output on my sBitx. The eventual goal is to try SATELLITES. But I have to crawl before I walk..... Gordon KX4Z??

I have an sBitx v3 that was purchased assembled. It worked fine until yesterday - when I turned it on and attempted to tune my antenna, there was no output. I rebooted the Pi, same issue. I also noticed a constant "clicking" noise, at maybe 3 or 4 Hz on most bands. Finally, when I attempt to tune - it tunes only 50 KHz and then it stops. It worked fine the day before. The only thing possibly different is this - when I shut it down daily, I will close the software and then shut the Pi down via Raspbian. Then I shut off the sBitx. However I forgot to do the latter - the sBitx had power to it all night without the Pi running. That's the only thing that I can possibly connect to the fact that I now have an sBitx that is not working as it should. I'm quite disappointed, as I was really enjoying operating ft8 with it. Ideas??? Thank you in advance, John N2LCX

I just purchased and received my first uBitx, and I have a question. Does it take regular paddle input on one of the 3.5mm jacks? I changed the CW type from paddle to either iambic A or B, and nothing changes, it only acts like one side is working, primarily dit. I have three paddles I use on my other radios, and all work as expected on those, but not on the uBitx. I get the same reaction from the radio if I plug in the microphone supplied to the left hand 3.5mm jack, and use its PTT key in CW mode. -- -- J R Parrick (K0TBS) Si vis pacem, para bellum! K?TBS website

I just received my sbitx v3 board only kit. After wiring up and powering on, I realized that the board wasn't powering the pi 4. Is this supposed to be, that the pi needs its own power source? If I use a proper power supply to the usb-c jack on the pi, all works fine. Any ideas as to what I need to look at? K8MCB -- Mike - K8MCB

Hello all. I bought a sBITX v3 new at beginning of December. I used it a few times. I had an accident where power cable became spliced by sharp metal on a rental car while I was setting up to activate a POTA park. In a hurry to get back on the air, I accidentally reversed the power wires after repairing them and thus blew up my then 3 week old sBITX. It had no power, no PI display. No anything. 10A Fues inline did not blow, but reversed polarity "fried" the radio. I am not an electronics or RF expert, and am fairly new to HAM radio. I did read through the other messages here in the group and did find two other people that have reversed polarity their systems and I read the suggestions to fix their boards. Unfortunately both seem to have stopped reporting progress and/or have abandoned fixing the sBITx. I have it now partially working! What I have fixed so far: 5V flag was not 0v. I replaced the 5V supply with the new “recommended" version (setting the voltage properly before putting it in the sBITX). I also tried the RC/Drone 5v “BLOCK” that was also recommended. Both work the same. Replaced the diode right under the 5V supply board. It had blown, probably doing its job and partially saving the system. I now get proper 5v flag and the system boots. I have visually looked at most parts, there does not seem to be any visable damage, nothing seems to be running “hot” at idle. Voltages look correct in the places I that I can measure them with my volt meter. RTC did not work properly from factory, and the system time was always incorrect at boot. I think the RTC board may have been shorting out on the toroid below it, they were touching. I remove the board and put electrical tape under it and replaced the RTC board back in position. Now the PI keeps time between power cycles. Problems still to solve: 7mhz band works great. I can FT8 all over the world. Waterfall is clean, audio is clean. Frequency seems to be off a few 100hz but it seemed that way from new but I now have to operate in RIT. The BIG issue is now relating to operating above the 7mhz band. There is horrible RX noise everywhere. I am not able to receive anything on those bands. I have not tried TX above the 7mhz band. Noise is present with both 5V regulators. I do not know what to do. I assume I have a damaged resistor or cap but I do not understand the band processing or why 40M works great and everything else is full of noise. Below is a link to a video of what it sounds/looks like. You will see the noise is not dependent on mode filters or RX gain and vol: https://share.icloud.com/photos/0edz9o3Q8U2fpqyXVDtmg8gXg I am limited in my knowledge and tools… but I think I am close to getting it fully running again. It has been a great learning experience on what is inside a radio. Replacement boards are out of stock, so that is not an option at the moment. Does anyone out there have suggestions on what I should look at next? What would be causing noise above 7mhz on the receive side? Your help is greatly appreciated!!! Thank you to all in this community! -Jerry

Both sBitx and uBitx are currently out of stock. When will they be again in stock? 73 - Pierre - FK8IH