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I have not heard that a version for SSB is going to arrive anytime soon. I actually do not want to buy a (tr)uSDR unit, but I am considering this:
Has anyone here done this, and if so, what was your experience?
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Wayne S.
KF7RCM
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I don't knit why you think SSB isn't going to arrive soon on the QMX. .
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The QMX/QMX + has all the hardware for SSB already, always has. It just needs the firmware.?
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Hans is working on it as the highest priority. I know he won't give timescales but I suspect its only weeks away.
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I would think by the time you finish reverse engineering everything and building your own firmware from scratch, the qmx would probably have had the SSB update released.
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The uSDX struck me as an extremely clever project that was a proof of concept of the same methods that will go into the QMX SSB...? But I remember at the time the conclusion was that while the uSDX technically worked for SSB, the actual quality of the SSB signal was pretty poor due to limitations of the hardware that was never designed for the processing power needed by the EER method of SSB generation.
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I would wait for the QMX firmware, personally.
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I am sure there are more knowledgeable members around who can correct me on the details...
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Could very well be, happens all the time in my universe.
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Wayne S.
KF7RCM
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Hi Wayne,
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I was a (crazy) one who tried QCX-->uSDX --> early version of DL2MAN. Well it works per say. Sound quality with that firmware was poor. Later upgrade and (tr)uSDX by Manuel DL2MAN.de is much better but still short on a good sound quality. Don't get me wrong, I love this rig and made several SOTA activations and it is my "spare" portable rig should something go wrong with my original mcHF QRP from M0NKA. I would say its a rig which is accepted if other side wants QSO with you, rather than other way around. In emergency or simple ops its OK.?
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As many here, I am awaiting for SSB option on QMX as it would have form and weight close to (tr)uSDX but quality of mcHF. I suspect this could be a minimalist rig for many SOTA/POTA activators.
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Recently Hans indicated in the interview that SSB is small number of weeks rather than long month away, so I put my money on early autumn.
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73 de Marek SP9TKW
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Definitely a valid point,? thanks.?
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Wayne S.
KF7RCM
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With the replies I've been getting, I think I will get and build the QMX. I appreciate yours and everyone's input.?
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Wayne S.
KF7RCM
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I got involved with that back when and it was terrible.
The RX as it was at the time was fine but TX unuseable.
I ahve not heard any of the later versions since are any better
for SSB but they are popular for CW.? But then again a bare
QCX is a very good CW radio and lower RX power needs.
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Allison
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Post online only,?
direct email will go to a bit bucket.
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Alison Helpful hint - I suggest you define what? That was . I know what you mean , but someone reading your post may not (might think you mean Qmx for example).
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>>> I actually do not want to buy a (tr)uSDR unit, but I am considering this:
QCX Mini -> uSDX Mod ¨C DL2MAN.de<<<
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What that was is the base modded QCX to make uSDX.? As in all tries on
air were "what is that", "is that you", and "you have a blown final" based
on distortion comments.? Marginally intelligible.
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Over on Eham HAMHOCK75 in the QRP forum did tests on two of them
and it mostly didn't behave.?
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There is a very tlong topic in here, not visible to email messages about
that horror show.? THen it was spun off to its own group...
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To someone that can't stay on topic I can see how hard that
must be.
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Allison
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the original topic was back in 2021..
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/g/QRPLabs/topic/29572792#msg30792
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It was 279 posts long.
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To make QCX an ok SSB RX the audio filter needs to be altered
as the cw bandwidth is not very good for SSB.
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Allison
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As someone with now-elementary soldering skills and aging eyes (or I should say, perhaps because of aging eyes), I¡¯m wondering how difficult the firmware upgrade will be? Are we talking about a plug-and-play chip ¡ª or are we talking about SMC replacements alongside perhaps other things? I¡¯m certainly looking forward to it like so many others.
73, Randy K7RAN
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Randy,
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For QCX its a plug in chip, for later QDX and QMX its suitable cable and sfotware download.
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Allison
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Post online only,?
direct email will go to a bit bucket.
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That's the beauty of a good SDR design. No replacement chips etc. Just load the new firmware in via a computer and job jobbed
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On Sat, Aug 10, 2024 at 01:55 PM, Randy K7RAN wrote:
As someone with now-elementary soldering skills and aging eyes (or I should say, perhaps because of aging eyes), I¡¯m wondering how difficult the firmware upgrade will be? Are we talking about a plug-and-play chip ¡ª or are we talking about SMC replacements alongside perhaps other things? I¡¯m certainly looking forward to it like so many others.
73, Randy K7RAN
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Github of usdx:
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73, Barb
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I got involved with that back when and it was terrible.
I do not remember you being involved at all. But I do remember you telling everyone it ?s not good and cannot work.
Yet, here we are, uncountable uSDX and 20000 (tr)uSDX out there, and people just use it for what it was intended....
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In the end it is way better than its reputation.
See for example this video, which was recorded, using 1,5 year old firmware:
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Guido has improved SSB Quality further since then. But even with that old Version I was still able to attend the 60m emergency network.
Sometimes I think people spend too much time over theory, while they could have their answer in seconds, when they would just try it for themselves....
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73 Manuel; DL2MAN
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Well I still have my brass board work.? I pust the QCX back to its nominal design.
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I was given a recent version... tried to talk to the local usual group and the response
was sounds terrible, is that you Allison.? There are two or three in the area and CW
is their primary use as they gave up on SSB with it.??
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Many did it because it was cheap enough if it failed it was not painful.
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As a CW radio is not bad.? Eats more current that QCX.
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--
Allison
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Post online only,?
direct email will go to a bit bucket.
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That?s pretty vague and too anecdotal for a technical person, like you.
I can?t really tell what went wrong on your "brassboard" but I assume, you?ve used old QCX SSB Code.
Same goes for QCX: QCX SSB Code was not developed further since now abt. 2,5 years. Even though people have claimed to improve stuff, they?ve just flipped some switches in Guidos code.
No real work happened on the SSB side.?
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You have been given a recent version ? What would that be ? Chinese clone like red corners, that also comes with old QCX-SSB Code ?
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The only software, that was permanantly worked on, was (tr)uSDX Code.
What that can do was documented in the video link below.
This video includes recordings of 5 different Receive stations of the (tr)uSDX Signal and I was using 3 different mics as shown.
You can argue, that it sounds rough, but it gets the job done.
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73 Manuel; DL2MAN
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I think this is a very interesting read on uSDX/(tr)uSDX, a lot of interesting info here: And:
On Tue, Aug 13, 2024 at 10:30?AM Manuel; DL2MAN via <DL2MAN= [email protected]> wrote: That?s pretty vague and too anecdotal for a technical person, like you.
I can?t really tell what went wrong on your "brassboard" but I assume, you?ve used old QCX SSB Code.
Same goes for QCX: QCX SSB Code was not developed further since now abt. 2,5 years. Even though people have claimed to improve stuff, they?ve just flipped some switches in Guidos code.
No real work happened on the SSB side.?
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You have been given a recent version ? What would that be ? Chinese clone like red corners, that also comes with old QCX-SSB Code ?
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The only software, that was permanantly worked on, was (tr)uSDX Code.
What that can do was documented in the video link below.
This video includes recordings of 5 different Receive stations of the (tr)uSDX Signal and I was using 3 different mics as shown.
You can argue, that it sounds rough, but it gets the job done.
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73 Manuel; DL2MAN
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Marek SP9TKW
Timothy Fidler
Randy K7RAN
Barb WB2CBA
Manuel; DL2MAN