Re: FT8 in USB mode - not working right?
Good to know, thank you. Hopefully Hans can reproduce it also.
BTW, In WSJTX, I can't select the QMX as a rig type without crashing WSJTX. I have to use QCX/QDX. In JTDX I can select QMX OK. Just found this out while trying to figure out the USB tx issue.
Tony
AD0VC
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Yes I can duplicate this behavior in wsjtx. Digi mode works fine.? Switch to USB mode I get one good transmit then out just goes BLIP (keys up and unkeys for a microsecond) every time? after that.
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Re: FT8 in USB mode - not working right?
Yes I can duplicate this behavior in wsjtx. Digi mode works fine.? Switch to USB mode I get one good transmit then out just goes BLIP (keys up and unkeys for a microsecond) every time? after that.
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Re: QMX high band no receive
I'm not sure if it's a coincidence, but the receive Mux chips (IC402 and IC403 on the diagrams) on my unit also died when trying the new firmware.
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Agreed that it would like Jeff is the right person to contact for repair.
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Greg,
N1TR?
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Reloading the version 3 software also does not correct this.? VFO A is now basically disabled as when VFO A is selected the QMX only transmits on the Band Configuration Frequency center.? I don't know how to fix this.
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Martin, my setup uses Ham Radio Deluxe as the primary logger.? WSJT-X uses Ham Radio Deluxe as the rig in its settings.? All of its communication flows through the logger first.
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FT8 in USB mode - not working right?
Anybody else able to run FT8 in USB mode? If I have USB mode selected, I can only do one CQ transmission. After the first one, subsequent ones do not produce RF. Restarting JTDX/WSJTX doesn't fix it. Only cycling power on QMX+ will fix it. Interestingly, I
can do as many manual tune cycles as I want prior to my first CQ, but after that nothing will produce RF out.
If I put it in DIGI mode, everything works fine. Both WSJTX and JTDX behave this way. QMX+ responds to the power off button so it doesn't appear to be hung.
Tony
AD0VC
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Re: QMX SSB settings for Winlink?
Thank you Stan, I fiddled with it last night and had trouble with Putty connection to the right.?
This afternoon I was using win link and it doesn't seem to get beyond speed level 5, then it falls back to speed setting 1 or 2.?
Not sure if I am missing some microphone settings or the like?
Transmit seems to be 4-5 watts based on my power supply display.
On Fri, Mar 21, 2025 at 11:38 AM, Darrell KI4RXJ wrote:
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??
With a little testing, I see that JS8call, with the radio mode set to "Data/Pkt", will use Digi mode on the QMX if you manually set QMX to digi mode.? It for some reason does not seem to ever send the mode command (MD6).
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When I set the JS8call radio mode to "USB", it does indeed send the mode command (MD2) when you hit 'ok' to dismiss the radio settings dialog.? And it works fine for me in USB; I get good hearbeat responses, at a little lower level than Digi mode, since SSB right now is putting out a bit less power.
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JS8call unfortunately won't switch QMX back to Digi mode, at least in any tests I have run.
But you can do that yourself remotely by sending the MD6 command via USB.? One way to do this is to bring up the QMX terminal program, select "PC and CAT", then "CAT command test".? Type in "MD6" and the radio will switch to Digi mode.? You can type in "MD" to verify, and see the response "MD6".? [The very first time you bring up this CAT command tool, you may have to type in the first command twice; sometimes the very first command isn't recognized.]? Some other radio programs have a tool that you can use to send custom commands to your radio; these will also work to send the remote command.
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Stan KC7XE
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Re: #qmx #SSB Firmware beta 1_01_002 release
#qmx
#ssb
I am running 1_01_003 and see similar signals extending well beyond my base frequency, maybe a couple of 100 KHz on my TinySA as well. I am using 60 DB of attenuation into the TinySA. It seems like the IMD goes much further bandwidth wise than other transceivers I have worked with.?
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Jim
AC9YY
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I just got a Mini for 20 meters finished. I knew it was small but it’s much smaller than anticipated. Worked several stations and had some into France on Reverse Beacon. Unfortunately it was 2 am local time. Hope to find a time to get across the pond when people are awake. I got this one for taking on hikes. 73s John N4HNO
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Re: Odd 20 meter calibration
On Sat, Mar 22, 2025 at 08:21 AM, Brien - KE7WB wrote:
This may be independent of SSB software version.? 20 meter calibration is different than the other bands.? I get no power output indication on the meter during 20m LSB and USB IMD Sync.? I have tried with both 80/20 LPF swap enabled and disabled.
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I figured out apparently why this is happening.? ?Looking at my Band Configuration settings I had accidently got a zero in the Frequency center setting for 20 meters.? After I corrected this to 14175000 (presumably any valid frequency between 14.000 and 14.350 MHz is good)? I re-ran calibration for 20 meters and got similar curves to the other bands.
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So if you are having a problem with weird calibration on a band, double check your settings in Band Configuration.
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Brien - KE7WB
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Simple and very tiny mic for the QMX.
#qmx
#ssb
Here's the tiny mic that I've been using with my (tr)USDX and now the QMX. It's really simple to put together - I took an old mobile phone headphone that had an in-line mic and push-switch and simply removed the headphones and re-wired the switch and mic element as per the QMX/(tr)USDX specs. It works surprisingly well and weighs next to nothing.... Perfect for SOTA etc.? ( link, for when the in-line image disappears: ) 
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Running SSB version 3.? On 20 meters if I tune from VFO B it tunes on the correct frequency.? If I? switch to VFO A it tunes on the frequency that is the Frequency center defined in Band configuration, not the frequency in VFO A. ? ? Prior to this happening I accidently had a Frequency center stored as 0? for 20 meters.? After I corrected it to 14175000, I noticed this behavior.? Cycling power does not appear to correct this.??
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Brien - KE7WB
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Well SSB sure works. Yesterday I worked S51DX in Slovenia on 20 metres. That's 8,700+ km with less than 3 watts! My MIC settings were pretty basis but I did add a little compression (set to 5).
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I'm a happy camper!
--
73, Rick
VE7TK
Website:
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Re: MicMod for the QMX+ using cheap Baofeng Mic
#QMXp
Nice, Timo.
One minor note: the QMX has an internal DC blocking capacitor on the mic input, so an external one is not needed.
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Re: #qmx #SSB Firmware beta 1_01_002 release
#qmx
#ssb
On Sat, Mar 22, 2025 at 06:45 AM, <rentwist@...> wrote:
the XM8500 is a dynamic mic
A dynamic mic is not well suited to QMX, unless you modify QMX internally.
This is because a dynamic mic has an impedance of about 300-600 ohms, and the QMX is expecting a high-impedance microphone, 2.2K? ohms or greater.
So you can't get good performance from a dynamic mic on QMX.
Stan KC7XE
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Re: qmx+ ssb fldigi psk31 - won't transmit
Thanks Lars.
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Would be good to know for future reference.
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73
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Ian G4GIR
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----- Original Message -----
Sent: 22/03/2025 19:06:16
Subject: Re: [QRPLabs] qmx+ ssb fldigi psk31 - won't transmit
unfortunately no! i don't recall what i had there before but i am pretty sure it was either timeout or post write delay on hamlib rig control window.??
i will go back & try to re-create my issue. if i am successful in isolating the fix, i will post it here.?
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Re: qmx+ ssb fldigi psk31 - won't transmit
unfortunately no! i don't recall what i had there before but i am pretty sure it was either timeout or post write delay on hamlib rig control window.??
i will go back & try to re-create my issue. if i am successful in isolating the fix, i will post it here.?
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Re: #qmx #SSB Firmware beta 1_01_001 release
#ssb
#qmx
Hi all,
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THANK YOU HANS. You're awesome. I appreciate the way this group and your rigs work... I enjoy being part of the process of development, even if by osmosis LOL... I doubt I will be much help.
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I am taking it slow. Installed the beta firmware on my QMX+ with no issues, and am listening to the OMISS 20M net on SSB in the background as I work on my laptop on work stuff. When I get the electret mic in I ordered, I'll get more brave. It sounds really nice to me on the portable / battery operated speaker system I built.
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I have noticed no issues at all with CW in comparison to the previous firmware releases (which matters to me because I am 90% a CW guy). Well done!
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THANK YOU!
Joel W9JFK
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Re: qmx+ ssb fldigi psk31 - won't transmit
Hello Lars, Can you tell us which settingdid it?
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73
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Ian G4GIR
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----- Original Message -----
Sent: 22/03/2025 17:55:18
Subject: Re: [QRPLabs] qmx+ ssb fldigi psk31 - won't transmit
Thank you both! one of the settings on the rig control page did it - am transmitting now!
i had found the mic source setting earlier, but by itself it wasn't enough.
i apreciate the help
regards lars/kn5ute
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Re: qmx+ ssb fldigi psk31 - won't transmit
Thank you both! one of the settings on the rig control page did it - am transmitting now!
i had found the mic source setting earlier, but by itself it wasn't enough.
i apreciate the help
regards lars/kn5ute
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Richard Dyer
Brien - KE7WB
Mark K9TR
Rick Williams - VE7TK