开云体育

Has anyone found a solution to getting a decent rf output using external software with the sbitx?? I am using the 64bit image with sbitx manager. Checking with an external meter I get 25w on 40m and 20w on Sbitx screen with both cw and ft8 built in modes.?

On DIGITAL with JS8CALL and FLDIGI I don't see any output on the sbitx meter itself I have not checked with the external meter but there does not seem to be any modulation coming from either program showing up on the sbitx screen just a flat line on tx.? The loopbacks are setup per the manual though I have tried other settings and on receive works fine.? No way I can find to drive the audio out from the external software into the Sbitx (pavucontrol or alsamixer) that seem to make a difference.? I see reading on here this is common.? Has anyone come up with a solution???


Thank you
Ryan?
KK6DZB

Sbitx manager should be sbitx toolbox.? Could not edit post.??

Ryan,
in order to have an output signal, make the following settings. If you use an external log program that is installed on the RPi, you will see the additional settings below.




Use SSTV only on an external PC on a laptop, because qsstv doesn't work with sbitx anyway. MMSSTV 1.13 is currently being further developed by a Spanish team, which you can find under the name MMSSTV-YoniQ 1.13.3. This requires an external USB audio card (I use the WB2CBA made by Barb).
Yesterday I managed to make some qso in sstv mode using sbitx and external laptop and the usb audio card.

It was exactly 39 years ago that I first saw an sstv image on the converter I built myself with 39 ttl ic. :-)
I was a little nostalgic.

--
Gyula HA3HZ

Gyula,

Thank you. ?Those settings worked! ?I have about 12w on js8call. ?Fldigi is also working but having a lot of rf feedback. ?Also fldigi hangs on a frequency change. ?

I have qsstv on my main rig/computer. ?Lots of decoding only have one qso. ?I want to use the sbitx for essb freedv js8call and really want to run varac on it. ?The sbitx is for remote and to just mess around with as I get bored working on my main rig. ?

Ryan
kk6dzb

Ryan,
You can reduce rf disturbances by eliminating external wires that cross each other and by not having a grounding loop between the devices in the grounding of the station. That is, there should be grounding at only one point, and do not string it, but lead it to that one point if the grounding wire is necessary.

I also use a FT140-43 ferrite ring for the sBitx feed, which has 6 threads from the DC wire (I have 2x 2.5mm2). The power supply is current-limiting because I don't like having to constantly repair something. So I use the v2 device from 12.5V with a current limit of 6.3A. Until now it was 6.00A, but now that I am sure of stable operation, I added 5%. :-)

One more thing, since we are close to QRP, a very good antenna is important. Here I have to decide whether I expect more DX or more local QSO. I have a vertical Delta Loop, which is installed at an angle, so the DX effect is good.
I was surprised when I received a good report even after 16,000 kilometers. This is a matter of propagation, as the RF magnitude coming out of the device is also affected by several things.
Good luck with using the device and I wish you patience.
--
Gyula HA3HZ