Sven DF2KS
Is anyone here interested in the (tr)uSDX? I find that little box quite fascinating and would enjoy to rebuild it. But I have a little bit of respect for starting a group buy. I would prefer to just join a group order, but I don't know any groups in my area. #qrp #truSDX #DL2MAN #homebrew
Jan 6, 2022 at 9:46amWeb
Show threadMichael (DK1MI)Jan 6, 2022
@DF2KS I would be very interested!
Show threadAndreas, DJ3EI, he/himJan 7, 2022

@DL6MHC
I wonder how that #truSDX rig can do SSB TX with a class E PA? The main options are: Works only if the incoming audio contains only one frequency at a time (this is what the QCX does). Or something really complicated is done with the power input of the PA (this was developed for SSB TX for satellites many years ago, but I've rarely seen it in practice).

Myself, I'm only curious; not interested in building this rig myself.
@DF2KS

Show threadSven DF2KSJan 7, 2022
@dj3ei @DL6MHC
Link to forum: https://forum.dl2man.de/
Link to truSDX in action:
https://www.youtube.com/watch?v=V3IjAeIPwJk
Link to assembly Instructions:
https://www.youtube.com/watch?v=VVGBapoCUls
#qrp #truSDX #DL2MAN (2/2)
- Index page

Show threadAndreas, DJ3EI, he/himJan 29, 2022
@DF2KS
I put my question to the forum and got a (mind-boggling) answer. https://forum.dl2man.de/viewtopic.php?p=765#p765
In short summary, one could say the DSP pre-distorts so the end result out of the PA is SSB. Wow!
@DL6MHC
Sticky: Post (tr)uSDX questions for the developers (Manuel DL2MAN and Guido PE1NNZ) in here - Page 4 - (tr)uSDX Forum

Show threadSven DF2KSJan 30, 2022
@dj3ei @DL6MHC I had to take some time to correctly understand your question and especially the answer. This is really a big and very interesting thing.
Show threadAndreas, DJ3EI, he/himJan 7, 2022
@DF2KS
It took me a moment to find https://dl2man.de/ (first was at https://qrper.com/tag/usdr/ discussing low-quality Chinese clones). These URIs are for the convenience oft those who, like me, don't yet know the #truSDX.
DL2MAN.de – home of the (tr)uSDX

Show threadSven DF2KSJan 7, 2022
@dj3ei I wasn't expecting that at all. I almost have the feeling that there is a hype about the truSDX. I am now in contact with DL2MAN. He recommends doing a group buy on multi-eye basis. I was surprised. There are actually already a lot of interested people all over the world. Here you can see the device in action. I admit that the antennas in the video are a bit unrealistic, because you rarely have a beam and a lattice mast of 20 metres in QRP, but the device is still interesting for me.(1/2)
Show threaddg1psiJan 8, 2022

@DF2KS
Yes. Definetely. Especially for CW-only SOTA this device sounds really interesting.

For SSB I prefer my IC-705. I don't want to miss my waterfall

Show threadSven DF2KSJan 8, 2022
@dg1psi Yes, it's a bit flat here for #SOTA. 😂
But I would have a #WWFF area on my doorstep. Or #IOTA on holiday. I've never had a waterfall, so I can't miss it.
Show threadMichael (DK1MI)Feb 8, 2022
@DF2KS @dg1psi I just participated in the latest group buy: https://forum.dl2man.de/viewtopic.php?t=113
OPEN - DL German Group Buy-dc8lz Round 3 - (tr)uSDX Forum

Show threadSven DF2KSFeb 8, 2022
@DL6MHC @dg1psi Thank you very much for the information. Great!
Show threadMichael (DK1MI)Feb 9, 2022
@DF2KS @dg1psi Printing the case right now :) Can't wait for the kit to arrive!
Show threadSven DF2KSFeb 9, 2022
@DL6MHC @dg1psi My case has also been here for over 3 weeks.😃
Show threadMichael (DK1MI)Feb 9, 2022
@DF2KS @dg1psi I didn't realize until just now how incredibly small the radio is!
Show threaddg1psiFeb 14, 2022

@DL6MHC @DF2KS So true :). I'm really looking forward for the kit.

Let's see if my two left hands are able to build this sweet little kit ;)