Ashhar, that's your reward for producing such a finished and professional looking transceiver. The uBitX, the -40, etc, were clearly experimental and not all done so no surprise.

As I crawl through all my tests on my V2 with TVS and V3 software plus the fixes I'm finding a better and better unit. The receiver is outstanding as have been your past designs. I expect in a year or so, all the issues will be done and a ham not so interested in experimenting, will find a fine transceiver. Since a separate computer is not needed for logging, digital modes, QRZ lookup, and web access, it is an impressive compact radio+computer.

73, Bruce, W4BRU

Remote ssb hf?

I don't recall where I found it, but the email is:

sales@...

There seems to be confusion about whether there's a warrantee on the pre-built radios. I think it's 30 days.

Good luck.?

Jim
WB0KWJ

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I had virtually the same problem. The unit stopped operating after about 20 minutes, with no power out. Then repositioning the box on its back restored partial power, about 18 W on 80 m, dropping to about 1 W on 10. Others have reported similar experiences with sudden loss of power out. My guess is that this is related to thermal expansion and contraction of the circuit board—compromising SMDs or solder joints in the driver section—due to heating of the finals.?

I contacted the makers, and they sent me a new unit, which had a receiver problem. I’ve sent both of them back. Hopefully, I can get one that works. I suggest you also contact the makers. I think they have a serious quality control issue, and could end up with serious customer relations issue. ?

Jim

?

So let me restate the question how do I diagnose a low power out condition?

It's interesting, isn't it, as long as you don't know what the CPU temperature is, it doesn't bother you. You just use it.
Google says:
"What is the maximum temperature a CPU can handle?
How hot should my CPU get? The safe temperature range for most CPUs is between 40–65°C (or 104–149°F). At the highest loads, your average CPU temps can go up to 80–85°C (176–185°F), but consider this the absolute limit. Sustained CPU temps above 80°C (176°F) can do long-term damage to the CPU and its silicon."

And my experience is that it depends on the modes in which I use it and how long (continuously). For me, the external heatsink is at room temperature, and the CPU temperature would be high for my usage if I hadn't done internal cooling.
I cool the outer rib with a 92x92x25mm silent fan.
I use it in FT4, FT8 and sstv mode, which use the CPU in continuous operation. One time I saw that I was close to 80C degrees, then I had no CPU cooling and I made a screenstream of the process I used.
When I noticed the higher temperature, I immediately stopped recording. I am currently cooling the CPU with a 50x50x10mm silent fan and heatsink. Thus, the maximum CPU temperature is around 40-50 degrees Celsius. I'm still using the first RPi4 and I changed the output FETs once because I was testing on battery and had no current limitation. I'm getting close to 4300 QSOs with these FETs I replaced and 6.3A current limiting at 12.5V with the IRFZ24N fets.

These are my experiences.
From the beginning, I constantly make sure that I am able to cool the heat-generating parts. I have been using the device since the release of the v3 alpha. (Nov 2023)
--
Gyula HA3HZ

Here is a sneak peak on another project currently in development.




-JJ
?

So as long as it's in the grey it's okay. Thanks JJ, I'll stop worrying now or find something else:-) BTW, it seems to be working quite good. I don't know if this is possible, but the waterfall seems better looking with less noise in it, maybe it's just the band is more quiet today, but the overall feeling is smoother operation.

Joel
N6ALT

The temp will change from orange to red if the radio gets too hot. It is primarily there to monitor the Pi CPU temp inside the radio but can be used to indicate relative internal temperature inside the radio as well.?

The CPU will throttle when it turns red.

I never worried about my sBitx V3 temp until yesterday when I upgraded to JJ's 64 bit OS, now the temp stares at me all day long making me worry. I run my V3 all day everyday. it's been on almost three hours now and it says it's at 68C, does that seem hot too hot? The case doesn't feel any hotter that it did with the 32Bit OS. What do we think?

Joel
N6ALT

Thank you Gary, now everything works @5Vcc ( but no more touch screen, of course!)

I can probably save energy at 3.3V, but I use the 5351 board from Cina,

working @5V. There is always something to learn, for example?

not all BAT54 are the same.....I need BAT54SL, not a common BAT 54,

or 54A or 54C, and of course I buyed the wrong ones... :-)))))

C81 on emitter of Q90 must be 100nF, and not 470pF as indicated on V6.

Still a lot of fun, also at 68 y.o.

paolo

?

What was left out of the previous message:
--
Gyula HA3HZ

Bob,
On my 64-bit RC1, jtdx works with the following settings: see message #110915.
--
Gyula HA3HZ

I have a unit I purchased at Hamvention that is only putting out 9 watts. I sent and email to the sales email address about the issue but no response. This group is great but this is an OEM issue I believe. How can I get a direction or response?

I did add a Pi 4 8gb and 64 bit but that should not make a difference on the power?

Joe N7QPP?

Tom
? Try the screen resizer in the sBITX toolbox to give you a larger virtual screen that you can scroll around in.
--
73
??? Bob? KD8CGH

Thanks for the reply Gyula.

I tried USB, DIGITAL and FT8 modes with 127.0.0.1 and? 127.0.0.1:4532 and none of them worked.
--
73
??? Bob? KD8CGH

Thank you very much for the memory card and note? that fixed it it's up and running great

I am sending you a new one out?

This group continues to amaze me. Everyone is very helpful and, even better, they have great ideas and solutions. I expect the cable tomorrow.

73, Bruce, W4BRU

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I would like to use WSJT-X but can’t figure out how to adjust the screen size to allow accessing the fields at the bottom of the parameter page.?