Re: #qmx #SSB Firmware beta 1_01_002 release
#qmx
#ssb
No calibration is needed to listen to SSB. It isn't really needed to transmit SSB either. Better performance for TX if you calibrate.
Tony
AD0VC
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Do I need to do the calibration to listen to SSB and will CW and digital not be affected if I load the beta? I haven’t done anything about a mic yet but want to see how it sounds on RX without affecting CW and digital.
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Re: #qmx #SSB Firmware beta 1_01_002 release
#qmx
#ssb
Do I need to do the calibration to listen to SSB and will CW and digital not be affected if I load the beta? I haven’t done anything about a mic yet but want to see how it sounds on RX without affecting CW and digital.
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Re: Available Hand Mics for QMX SSB ?
On Thu, Mar 20, 2025 at 12:57 PM, Dennis Rieger wrote:
Qrpguys has a kit that should work. I ordered one to try it out.
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And here's more info from Qrpguys that was apparently published before turning the mic design into a kit. Be sure to read the kit instruction manual (from the above page) too:
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Some might find these videos to be useful. I've only watched (tr)uSDX designer Manuel's (DL2MAN) video, the fourth one down, where he covers how he 3D prints his parts as well as explaining the other electrical details:
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Finally, for a larger, more conventional-looking 3D-printed microphone shell, the mesh model files here might be useful:
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I have three 3D printers but I'm currently too busy beta-testing the QMX+ABS V2 from Sardar to build anything else, so I might have to ask Erik to make a QMX mic for me. Then I could at least join in and sample some of the long-anticipated SSB fun too! :)
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73,
Cal AD8Q
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Re: QMX+ build output power adjustments?
James, that's pretty typical, and mostly due to variances in component tolerances, toroid winding differences, your output transformer, etc. Nothing to be worried about.?
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73, Dan - W2DLC
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Re: #qmx #SSB Firmware beta 1_01_002 release
#qmx
#ssb
This SSB update is fun to use! both on digital and SSB modes....
Thank you so much, Hans!
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But in the interest of finding bugs to smash...:
I attempted to do Calibration from the front panel on the 002 release on my QMX+ (with no USB cable attached), and it locks up at the top calibration menu.
Specifically: power-on, select hardware test menu, scroll to Calibration, and push the select button.? It is all locked up; requires removing power to get back, without ever seeing the Calibration sub-menu.? (I had previously done calibration via the terminal, if that makes any difference...).
Same thing happens on my QMX with the 001 release.? Am I doing something wrong?? Anyone else have this issue?
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Stan
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Re: QMX SSB settings for Winlink?
Thank you gentlemen, I was able to send an email last night at level 6.
What's the best way to set up for switching between Winlink/VARA and JS8 call? I noticed in JS8 call there's?a radio setting for "None", "USB", and "Digi/Packet". With USB and Digi/Packet selected I wasn't able to get out. I'll have to go up and switch the radio to Digi mode to do JS8 call. Or maybe I can change it in the serial menu??
Currently my rig is in the shop about 150 feet from the house and I use remote desktop to interface with the radio and pc in the shop.
On Fri, Mar 21, 2025 at 9:27?AM Hans Summers via <hans.summers= [email protected]> wrote: ? When CAT control supposedly keys up the radio, I can see activity on the signal bars on the right side of the display, but I do not get the bar or even two dots under the "A" on the left side of the display.
This bar and dots under the 'A' only applies to Digi mode. But I agree it would be useful in SSB mode when the USB audio source is selected. I will add it...?
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Re: SSB Microphone Settings (feel free to share yours)
Thanks Brian . I am reluctant to try the SSB firmware.
I realize that settings are dependent on microphone, voice characteristics, etc.? but I thought I would publish my current settings that are seeming to work at the moment.? ?Power output is very dependent on controlling the microphone distance within an inch.
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Transmit EQ? No? (Don't even want to mess with more variables at the moment)
Mic AGC On Yes
Max gain 10
Hold time 10
Recovery 10? ?(If this is set too low AGC will recover too quickly and your power output will be all over the map)
Mic. gain 55
Mic compression 0
Mic. noise cncl. On
Mic. noise gate ON
Threshold? 95
Samples 100
Attack slope 10
Vox OFF
Drive Level 900? ?Default
CESSB? On ? ? ? ? ? Default
Phase predistort ON ? ?Default
Ampl. predistort ON ? ?Default
Ampl. PD thresh 70 ? ? Default
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Brien - KE7WB
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Re: #qmx #SSB Firmware beta 1_01_000 release
#qmx
#ssb
I am seeing this as well. Attempting to do calibration from the front panel hangs at 80m 1300 measurement. I wanted to run it from the front panel because I have tone spurs on some bands that go away with the USB disconnected. I think the spurs are affecting my calibration results.
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Tony
AD0VC
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Re: #qmx #SSB Firmware beta 1_01_002 release
#qmx
#ssb
Congratulations and thanks to Hans! Conditions were good enough to make my first contacts today on my QMX on 20m. I built , with trusdx wiring, which has worked great - thanks Adam for your contributions to the community as well!
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Dan
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Re: 5V SMPS Status Error V 2.8
Thanks for the quick feedback.
Indeed the problem was me :)?
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I discovered some not properly soldered joint and now everything works.
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Yes, the same SMPS boards work on all revs of QMX and rev 1 of QMX+.
jd
I believe the QMX+ Rev 1 use the same SMPS boards as the QMX Rev 4.
72 de Russ, va3rr
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Re: #qmx #SSB Firmware beta 1_01_002 release
#qmx
#ssb
Hans loving the SSB, I've put together a tiny mic for it the audio seems really good, all your efforts were worth it . I would just say to anyone using the SSB firmware before you plug any type of mic in make sure you have a dummy load connected. Also I had to buy a lot more bits than I needed to make the mic so if anyone wants one they are available.??
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Robbie
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Re: QMX shutting off at 10.5V
Yes, definitely something is wrong.?
Perhaps if you bring up the terminal diagnostics page that shows the power supply parameters, then turn down the voltage to just above where it turns off, it may give a clue on what's happening internally.
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Re: #qmx #SSB Firmware beta 1_01_002 release
#qmx
#ssb
Nice catch, Mario.
I just verified that using the sequence you just described, then attaching the terminal and sending the CAT MD command to the radio, it responded with MD9, which is reversed digital, or LSB.??
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But it doesn't always happen.? I just tried again after power-cycling, and the correct value is used.
So the question is, what causes it to get into the bad state?? I couldn't make it happen again after several tries.
If you can make it happen again, please share details.
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Stan KC7XE
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Last night I downloaded the latest firmware and threw together a rather basic microphone, and after going the the calibration tests it appeared to be working well into my main station transceiver. This afternoon I went to my local SOTA summit and was very pleased how well the QMX on SSB worked. Although I'm mostly a CW op its great to have another another mode available in such a small radio, ideal for SOTA.? ?
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Thank you Hans for all your hard work on this project, I enjoy building and learning about your radios just as much as I do operating them.
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73
Roger MW0IDX
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Re: QMX shutting off at 10.5V
Thank you Dan,
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I've removed the battery pack out of the equation and I use my lab linear power supply which can deliver 1A. I let the QMX in receive mode and I slowly decrease voltage and suddenly it shuts off at around 10.5V.
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With the battery it was more erratic and sometimes I got a high voltage warning whereas the voltage was definitely below 12V.
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In the menu I have min voltage : 7V, max voltage : 13V, supply voltage : prevent TX
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I think there is probably something wrong with my QMX but I am at loss at what it could be...
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73,
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Yannig - F4IUJ
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Re: #qmx #SSB Firmware beta 1_01_001 release
#ssb
#qmx
Hi All,
I enjoyed spending two evenings with my QMX 20-10 ver 1.01 and 1.02.
Noticed some oddities during calibration on 11 and 10 meter bands, calibration does not complete on 11 meters, stops at the DAC value of 700, restarted it many times - unsuccessfully. On the 10 meters calibration passes, but the graph is very different from the 20-12 meter bands. A sharp dip in the DAC 700-1300 area. Now I see other group members has the same problem for other bands.
On the control receiver 11 and 10 m.b. signals sounds without any audible and waterfall-visible problems, there is no difference with the 20-12 meter bands.
Internal microphone is active even if external is selected, but I read that this is not a bug but a feature and calmed down.
I tested 4 looking identical microphone capsules, three no-name?and one marked CZN-15e. All give approximately the same levels at a gain of +50. The CZN-15e signal sounds good with a predominance of high frequencies and one of the no-names emphasizes low frequencies it sounds good for me, will use it.
I would like to thank Hans again and again for the wonderful radio and SSB update!
73
Igor oh2jxa
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Re: QMX/QMX+ architecture
On 21/03/2025 15:18, Anders Helmersson via groups.io wrote: The frequency to the mixer is the dialed frequency minus the
IF frequency of 12000 Hz minus the side tone frequencey of 700 Hz Anders, Presuming the QMX is like the QDX, in IQ mode there is no 12KHz offset. The QDX manual has a good circuit description. 73 Alan G4ZFQ
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jd
I believe the QMX+ Rev 1 use the same SMPS boards as the QMX Rev 4.
72 de Russ, va3rr
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Re: #qmx #SSB Boom-Mic Headset and Radio Jumper for QMX/QMX+
#ssb
#qmx
Another thought...
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Make the whole mess into something that's mounted to (or under) the Key/Paddle and use it as a convenient junction block where you plug in your headset!
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M
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Daniel Conklin
Roger Dallimore
va3rr