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sBitx v3 - original application gives high power, wsjtx up to 2W only

 

Hi,
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Due to the problems with non-standard callsigns, I have decided to use wsjtx.
I have updated sbitx with the `update` script.
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I start it via VNC.
  1. I installed tigervnc on my sBitx
  2. I log in to my sBitx via: `ssh pi@... -L5907:localhost:5907`
  3. In another console on PC I run: `vncviewer :7`
  4. Then in the vnc session in a terminal I run:`killall sbitx; cd ~/sbitx; sleep 1; ./sbitx`
  5. In another console I run `export DISPLAY=:7 ; wsjtx`
  6. The wsjtx is configured as described here:
  7. I set Digital mode in the sbitx and FT8 in wsjtx.
The result is that I can see the received FT8 messages, I can transmit, but the power is limited to 2W (as reported by sbitx).
I can control the power with the slider in the wsjtx window. The power is proportional to the slider position, but the upper position gives 2W.
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When running only the original sbitx application, I can control power up to 20W and higher.
What is the reason of that problem and how can I cure it?
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73,
Wojtek
 

Wojtek,
Set it to USB and you can set the output power with the Drive value. The wsjtx slider does not work with sbitx, the Drive is the determining factor.
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Gyula HA3HZ
 

I set the mode to USB in the sbitx application and the maximum power is still 2W.
The slider in wsjtx still controlls the power.
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73,
Wojtek
 

I have this problem as well. Using either wstjx or fldigi, I get a max of ~3 W out(*) with the power sliders at maximum.
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I am no longer alone in the universe.
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(*) DRIVE set to 63 to get 10 W out on CW results in 1.3 W at the autotuner.
 

I run WSJTx on my DE which has the hardware upgrades. I used to just leave the slider up all the way and control the power out with the Drive Setting. But I recently upgraded and updated to the newest 64 bit image and 4.4 software. I now find that the slider has a large impact on the power output and I leave it at about 60% of max. I also am running in digi mode now versus USB as that is what defaulted with the upgrade. You might try upgrading.if you haven't already done so.
 

You can get real-time help on our Discord server.. ?
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-JJ
 

Wojtek,
I haven't been doing much radio lately and it didn't show up, but there must have been some modification, because so far the wsjt-x and jtdx transmit slider didn't affect the transmit power.
I just checked and it showed up, the slider position affects the output power. The change is probably related to hamlib.
The state I have set (sBitx v2) differs from the description referenced in point 6 (I think it's the original state, no one maintains the page).
The wsjt-x (2.7.1-rc8) setup looks like this:
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With this setting and gradually raising the slider, I see the 20 watt output power, unlike before, now the slider is at 50%.
This setting may probably be different if your output power scale value is different on the given band.
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Gyula HA3HZ
 

I have now switched from USB to DIGI and there is no difference, I use the previous settings. I read the output power on an external Daiwa CN-801Type H meter, because the built-in meter cannot be adjusted. (When I received the device, it behaved strangely for a long time, then I realized that one of the output power measuring diodes was faulty. The 1N60 diodes selected in pairs show the value shown in the picture for a 20 W output. The value is the same up to about 5 Watts, then it gradually differs.) Since I have v2, I had to set the scale value per band by using the default and changing the value, restarting and taking measurements, which was a long process.
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Gyula HA3HZ
 

So it looks like I'll finally have to upgrade to 64-bit version of the OS and sBitx software...
I tried to avoid it, as my sBitx v3 is equipped with 2 GB RAM RPi 4.
However, it seems that all the improvements are now implemented in the 64-bit version.
Are they going to be backported to the 32-bit one?
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73,
Wojtek
 

Developments are only done in the 64-bit version (the RPi4 can work with both versions), so it is advisable to switch to it.
It is important to save the contents of the /sbitx/data folder from the old uSD to another storage, because it stores the data here for the hardware to function properly.
If you have created a connection, it is stored in the sbitx.db file.
Use a USB stick to save daily variables (sBITX-Toolbox/ EZ data helps).
When using external programs, their settings are mostly in .ini files, which are needed when the Image changes.
It is important to always have a copy of the working OS, because it is easier to return to it in case of an error than to build it from scratch.
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Gyula HA3HZ

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