Re: #qmx SSB Firmware beta 1_01_004 release
#qmx
This is a bit unrelated, but I was wondering if it would be possible to make the QMX do FM? Because then with a short 10m antenna you could have quite the portable rig with CW, SSB, and FM.
And from me. Lubuntu works well and hassle free. Nearly 30 years of Linux for me.
Roger
8P6RX
Get
On 24 Apr 2025, at 13:45, "codeleaf via " < gmail.com@ target=_blank>codeleaf=@> wrote:
Another vote for Debian. It's been nothing but trouble free for me for 15+ years. Install defaults and use it. Updates won't break your machine.
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Re: #qmx SSB Firmware beta 1_01_004 release
#qmx
And from me. Lubuntu works well and hassle free. Nearly 30 years of Linux for me.
Roger
8P6RX
Get
Another vote for Debian. It's been nothing but trouble free for me for 15+ years. Install defaults and use it. Updates won't break your machine.
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Re: #qmx SSB Firmware beta 1_01_004 release
#qmx
Another vote for Debian. It's been nothing but trouble free for me for 15+ years. Install defaults and use it. Updates won't break your machine.
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Re: #qmx SSB Firmware beta 1_01_004 release
#qmx
On Thu, Apr 24, 2025 at 10:56 AM, ta2rx bekir wrote:
I hope you are not going to suggest using one of the free GUIs that sit on top of Linux. Been there, done that and had to format the whole hard disk after the first update. Thank you for nothing.
FWIW I have run Linux on nearly all of my systems at home for many many years, using mostly the Debian distro, and no issues.? It runs a lot faster and far more stable than the one Windows 10 system I have left for gaming.
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Not sure what you are referring to by "one of the free GUIs that sit on top of Linux".? The major Linux distros include a graphical desktop by default.? Do a standard installation and the graphical desktop works out of the box, nothing else to add.
?
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Re: #qmx SSB Firmware beta 1_01_004 release
#qmx
I have windows 11 fw004 and everything is working great except about every 10 minutes Win11 drops all three com ports like clockwork. Power off QMX+ power back on and its up and running again for 10 minutes. Revert to fw003 no QMX+ config changes and its rock solid. I have reset to factory defaults after each flash.?
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On Thu, Apr 24, 2025 at 07:27 PM, Randy Paulson wrote:
And Q111 gave up trying to settle the 2.9 vs 3.3v battle
Randy, no battle. If VDD rail is higher than voltage from the linear regulator D103 will block the higher voltage toward IC101.
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73 Ludwig
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Re: QMX and WinLink/WARA HF settings
Stan:
Is there a way in Winlink/Vara to restrict to a given band in auto connect (channel select)?
Chris
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Sorry for the delayed response to your insights. I've been out of pocket.
It is a bit odd, but yes, R110 and R112 both measured 29k ohms which is a bit out of spec, but I doubt enough to cause an issue considering their purpose.
I have definitely identified a S-D short on Q102 which Ludwig guided me towards when he brought up that IC101 should not be on in LIN REG ENs current state.
Maybe this was the original perpetrator. And Q111 gave up trying to settle the 2.9 vs 3.3v battle for superiority going on between the linear regulator and the SMPS.?
Q102 is out of circuit now, awaiting the parts that are arriving later today. So no more measurements at this point.
I am going to start with Q102 and D109 and check quickly to see what happens with a current limited 7v supply.
Will report back.
Thanks!
--
Randy, N4OPI
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50 WAtt Amp, Hot and Low output
20M QCX_Mini driving the 20M 50 watt amp, 13.5 volts, 50 ohm antenna load?6 watts output and the mosfets get hot
Set QCX keyer to practice mode and everything checks Ok, set BIAS, mosfets are cool.
Removed all coils to check for shorts and winding procedure. Checked etches for shorts.
REplaced the Mosfets ¡¡¡ no change. Possibly a shorted cap in the output stages.
Any suggestions ? ? ?
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Re: QMX+ with ~1000 tone on 12M & 6M
Richard,?
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Digikey info
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PCM1804DBR
296-26306-1-ND
IC ADC/AUDIO 24BIT 192K 28SSOP
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Replacing this chip did absolutely no good on my QMX+. Others have had the same experience. It¡¯s not a universal cure.?
73
Dick
W4PID
?
?
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Gang,
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The QRPBuilder magnetically attached Iambic and Single lever Paddles are now back in stock. Also, this will be our fifth year at the Dayton FDIM vendor night on Thursday May 15, with all our products available. We hope to see you there.
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73,
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Ken - WA4MNT
Karen - KF4EEL
qrpbuilder.com
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Re: #qmx #SSB Firmware beta 1_01_000 release
#qmx
#ssb
Nice work btw..
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If the qmx is in Practice mode, no SWR measurement is possible, but it is showing everytime an SWR? 1.6-1.8, and SSB will still work.I was working on a linked dipol.
Maybe the should be an information for a nonworking SWR test, or the SWR test should work everytime, even in practicemode.
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Re: #qmx SSB Firmware beta 1_01_004 release
#qmx
Except that one has to learn writing commands from scratch.?
I hope you are not going to suggest using one of the free GUIs that sit on top of Linux. Been there, done that and had to format the whole hard disk after the first update. Thank you for nothing.
I have already paid more than enough to MS and have got no intention to pay more in the near future for something that will soon become obsolete AGAIN.
Bekir TA2RX
If you¡¯re running anything pre-Windows 10 which is connected to the internet you¡¯re really asking for trouble.? However, rather than splashing out on a new whizzy machine, many older machines will run a flavour of Linux and be much more responsive than under Windows - and that upgrade is not going to cost you lots of money, perhaps just some time getting up to speed with the new OS.
--
¡ª
Amateur Radio Station EI6IGB/G8OGJ
New Ross
Co. Wexford
Ireland
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Re: Question: Does the power icon go on and off when you are sending CW?
Very glad my suggestions helped and you got it working.? Have fun with it!
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Re: QMX+ with WA3TFS amplifier
Thanks Donald - quite right. I¡¯m probably going to do what Jim is doing and just keep it a QMX / QDX only amp. It¡¯s just a fun little project to learn about and really appreciate the author putting it out. Then there¡¯s the fun of figuring out an ¡®issue¡¯ to make it work for your chosen radio.
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Good stuff !
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73, Jamie
WB4YDL
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Re: #qmx SSB Firmware beta 1_01_004 release
#qmx
If you¡¯re running anything pre-Windows 10 which is connected to the internet you¡¯re really asking for trouble. However, rather than splashing out on a new whizzy machine, many older machines will run a flavour of Linux and be much more responsive than under Windows - and that upgrade is not going to cost you lots of money, perhaps just some time getting up to speed with the new OS.
--
¡ª
Amateur Radio Station EI6IGB/G8OGJ
New Ross
Co. Wexford
Ireland
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Re: #qmx SSB Firmware beta 1_01_004 release
#qmx
On Wed, Apr 23, 2025 at 03:41 PM, Hans Summers wrote:
The SSB calibration tool now tests the PA amplitude modulator first, and refuses to run if the modulator isn't working properly. To determine if it is working properly or not, it sets the DAC value to 1000. This should produce a PA voltage of around?5.02 V in theory. "Fail" is when the measured voltage is outside the range 4 to 7V. Probably this range is too wide and could be considerably narrowed. But it should easily identify cases where a fault in the amplitude modulation circuit is causing the PA voltage to be always at max.,?which would both prevent proper phase distortion measurements, as well as prevent SSB generation working, as well as stress the PA transistors because they'd run at full power during the entire lengthy calibration process.
Might this be why I suspect my PA might have failed just now running calibration cycle?
I know I didn't need to but I wanted to see it run the process so I could see what it was doing...
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Re: #qmx SSB Firmware beta 1_01_004 release
#qmx
The operating system that Hans uses with his QMX+, or one similar, should run on your existing hardware at no cost.
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Interestingly it looks like the cathode tab of D516 is not connected to the solder pad, looking like it might have been touching but now not; I'm wondering if this might have caused it.
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Afternoon all,
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Well, it was all going too well.
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I had been using the 003 SSB firmware with good success and decided to flash the 004 update...this went well but I decided to run a calibration cycle and it got about 75% of the way through and the current draw jumped up with the attendant untoward smell emanating from the unit.
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I suspect the finals have failed.
This was running on 10 V from my bench PSU with a proper dummy load so I'm not perplexed as to why this would have occurred.
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Darn.
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Dj Merrill
Richard Dyer
Bill P.
Richard Hattaway