Re: Cannot change the mode on QMX+
Test CAT returns OK now but now Test PTT is RED. I presume this is because WSJTX expects the rig to be in DIGI mode. Because I cannot change the Mode nor the Band. I tried a Factory Reset, hoping it might solve the problem, 3 times. It did not work. Interestingly after the first time the Band changed from 30m to 80m, and after the second time to 160m but I cannot change them myself.
ta2rx bekir < ta2rx.bekir@...>, 14 Oca 2025 Sal, 01:15 tarihinde ?unu yazd?:
Thank you Alan. The drivers are installed properly now.
And thank you Ludwig. I can see the audio drivers, too, after following Alan's instructions.
However I, still, cannot change the mode nor the band.
Alan G4ZFQ via <alan4alan= [email protected]>, 13 Oca 2025 Pzt, 20:22 tarihinde ?unu yazd?: On 13/01/2025 13:49, ta2rx bekir via wrote:
> My PC sees only USB as the serial port.
Bekir,
You are saying that the PC is not showing the QMX+ as having a COM port?
Here is my updated page for installing the driver
Hans used my write-up but this has a few extra notes.
73 Alan G4ZFQ
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Re: Cannot change the mode on QMX+
Thank you Alan. The drivers are installed properly now.
And thank you Ludwig. I can see the audio drivers, too, after following Alan's instructions.
However I, still, cannot change the mode nor the band.
Alan G4ZFQ via <alan4alan= [email protected]>, 13 Oca 2025 Pzt, 20:22 tarihinde ?unu yazd?:
On 13/01/2025 13:49, ta2rx bekir via wrote:
> My PC sees only USB as the serial port.
Bekir,
You are saying that the PC is not showing the QMX+ as having a COM port?
Here is my updated page for installing the driver
Hans used my write-up but this has a few extra notes.
73 Alan G4ZFQ
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Maybe some steam punk-ish levers?? Momentary contact, of course.? Maybe a gauges of some sort to measure voltage & current?? GREAT looking build.
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Re: Beacon/WSPR - problem inserting call sign
Check the instructions for your particular firmware
Check the thing you think is a space actually is a space? . .? ?between z and /? on many FW? XYZn/+ ?
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Re: Blocking a band on QMX/QMX+
Larry,
I believe that you can “enable/disable” bands using Putty terminal mode and the “band configuration” menu.
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Re: Beacon/WSPR - problem inserting call sign
Hiroki,
?
A space is one of the options as you roll thru the letter selection?
Its just a blank character.
?
73
-Mike
?
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Re: Blocking a band on QMX/QMX+
On 13/01/2025 21:13, Larry Christensen via groups.io wrote: I would like to block out the bands I don’t use. Larry, I'm fairly certain that you delete them from the band list seen in terminal mode. Manual should help. 73 Alan G4ZFQ
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Blocking a band on QMX/QMX+
I would like to block out the bands I don’t use.?
I asked this once before but never got an answer on how to do it if it is possible.?
That would make moving though the bands I do use much easier and faster.?
TIA
Larry NA0F
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Re: Beacon/WSPR - problem inserting call sign
On 13/01/2025 20:32, Hirokik via groups.io wrote: I am failing to put my callsign in the WSPR menu. Can't figure out how to put blank space before 5 characters Hiroki, U3S? Firmware version? Manual:- "Note: from firmware v3.05, the callsign must not contain any spaces" 73 Alan G4ZFQ.
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Beacon/WSPR - problem inserting call sign
I am failing to put my callsign in the WSPR menu. Can't figure out how to put blank space before 5 characters of call sign per rule. I think I am following the manual's instruction but I must be doing something wrong. Any idea?
Hiroki AH6CY
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Re: USBC connector not installed correctly on QMX+
I think they are all this way. I own 3 of them and they all look the same but work.
?
Adding a wave step would add more cost per board. V 2.0 is shipped with firmware loaded so
the port is tested.
The USB port is tested on all PCB revisions of QMX and QMX+. Not just QMX+ Rev2.
73 Hans G0UPL
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Hans,
Thank you for your excellent explanation!? I wasn't worried about
it at all, it was just a discovery as I was investigating CW works
perfectly but digital was being squirrlly.? I've seen other
comments about this but no one had a reason.? Just user error, as
is typically the case.
Other than tweaking the low pass
filters on a few bands, I have not much left to do on this QMX.? I
have been on the air and made quite a few FT8 contacts with a
little over 3 watts out, and some surprising CW contact.? The next
challenge will be to try it out in a rapid-fire WWFF activation
with a pile-up, but I'm beginning to think this might become a
regular in my park activation line-up.? It's like a lot of
things.? I worry a lot less about a $150 radio than gets the job
done than my very expensive KX2 & KX3, and others in the
cadre.? It cost less than my first QRP rig in 2011, and performs
rings around that radio.
72
Charles - NK8O
On 1/13/25 10:29, Hans Summers via
groups.io wrote:
toggle quoted message
Show quoted text
In addition, I discovered almost immediately that too
much audio drive into the radio for digital modes will
inhibit transmit.? I thought something was wrong with
my QMX when it wouldn't transmit but for a brief
second, but when I turned down the audio drive to 100%
(Linux pavumixer) it behaved normally.? Presumably it
can overwhelm the ADC.? The audio was turned up for
another application but the laptop thought it applied
to the QMX as well.
There is no ADC involved. All transfer from the
PC to the QMX is digital via the USB audio sound card
emulation of QMX. So what happens if you have a sinewave at
full 100.0% volume, the sinewave peaks and troughs hit the
peak numbers the digital transfer is capable of. If you go
beyond that, then the peaks "wrap around" so you then get a
frequency component at even harmonics, at a lower amplitude;
QMX will then measure the incorrect frequency, as well as
determine that the amplitude (of those wrapped peaks) is below
the threshold and it will switch off the transmit.?
It's all correct behaviour of QMX.?
73 Hans G0UPL
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O Happy Day, indeed !
Worked Angola and France yesterday and today using my first QMX-PLUS and, my second QMX-PLUS continues to move up the waiting list !
72,
Bill, N4QA/QRP
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Updated Wiki Page: QDX QMX QMX_plus USB to serial for Win7 and Win8
#wiki-notice
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Updated Wiki Page: QDX QMX QMX_plus USB not ok for Windows
#wiki-notice
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Re: QCX classic 40METER key click
Thank you Ron… that’s precisely why I asked the question because the newer version uses disc capacitors, and I was not certain if it would make a difference.
i’ll give it a go and report back.
thank you.
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Re: QCX classic 40METER key click
The replacements CAN be polarized but don't have to be. The newer versions use 1 uF ceramic caps. Either is OK
Ron
On Mon, Jan 13, 2025 at 11:44?AM Howard Lamhut via <Howardlam= [email protected]> wrote: The key clicks are only on the side tone.
The actual transmitted signal is beautiful and produces a perfect sine wave on My oscilloscope.
in the version 3 board it’s 2 -10?F Polarized Caps.
Should the two replacement 1 Mf ?caps still be polarized?
thank you
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Re: USBC connector not installed correctly on QMX+
I think they are all this way. I own 3 of them and they all look the same but work.
?
Adding a wave step would add more cost per board. V 2.0 is shipped with firmware loaded so
the port is tested.
?
73
-Mike
?
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CW Practice / rag chew session FRIDAY
I will be doing another CW on the air practice session?Friday Evening at 23:00 UTC / 6:00 PM EST. Anyone is welcome. This practice is intended for operators who are new to CW or they need some practice. IT DOES NOT MATTER HOW POOR YOUR CW IS. Mistakes are OK. Poor fists are OK. Slow speed is OK. Really slow speed is OK. This practice is meant for you to improve your CW. I will do my best to adjust to your skill level. Operate at any power level. If several stations show up, I will operate as a round-table control station. I will do it as a round-table so everyone gets a chance to transmit. Please listen to my directions.
I checked propagation using VOACAP and the Ham contest calendar. It looks like 40 should be OK. I am a bachelor this weekend so my calendar opened up. Plan on being on the air for at least several of hours on Friday. I will need some breaks. I am also looking at morning sessions on Saturday and Sunday. I will send out separate notices for them if they are a go.
Details:
Time - 23:00 UTC / 6:00 PM EST
Band - 40 Meters
How to find me - I will find a clear frequency and call CQ. Go to the Reverse Beacon Network and search for my call sign AB8DF.
That will tell you what frequency I am on. Tune your station to that frequency and if you hear me give me a call. If there is a QSO in progress, please wait for a break in the action. Then send your callsign. If I hear you, I will invite you to join the QSO and start a round-table QSO.
Reply to this email if you have questions.
IT DOES NOT MATTER HOW POOR CW IS
Ed
AB8DF
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Re: QMX+ Toroids - To Glue or Not To Glue?
I hot glued a number of my toroids and it has not had any discernable effect on performance.? I was mostly concerned about the ones standing one and to keep another from sliding horizontally into a tabbed semiconductor device.? I used it sparingly.? Theoretically the introduction of dielectric material between turns can increase turn to turn capacitance which can affect coil Q, but a dab here or there should not have significant effect.
?
Brien - KE7WB
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Bruce Akhurst
Bill, N4QA/QRP
Howard Lamhut
Ronald Taylor
Brien - KE7WB