I remember the bad old days of installing kernel patches to allow Linux to access different hardware peripherals.
Then one day I had an early-ish Logitech webcam. A Mac (mini) wouldn't recognize it. But my Linux box did as soon as I plugged it in. I laughed out loud: Linux was (in this instance) easier to use than a Mac!
There's also the day Windows media player refused to play a DVD, claiming piracy even though the disc was purchased less than an hour before and I had removed the shrink-wrap personally just a minute before. Not my computer, obviously. Fortunately, vlc was only a download away.
So please pardon my?schadenfreude about a Windows machine not able to access the QMX. And good on you for having a Linux box around!?
(FWIW, I've found both and are loggers that are easy to run on Linux and will talk to the QMX. I may settle on xlog if I can figure out the shortcut keys well enough. But I'd be interested if others have found other software that works well without too much hassle. was too much hassle the first time I tried to run it from a different computer accessing a shared drive.)
On a more serious note, I remember Hans/the documentation saying the USB drive in the QMX was a highly limited implementation, just enough to work. That's going to be an unfortunate support headache if Microsoft changes their definition of "funcitonal" and consistently chokes on the QMX.
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I've gotten that same error a number of times with different USB peripherals especially since updating to Windows 11. Lots of chatter out there about Microsoft making changes that really screw up com port recognition and sound Assignments and such in later updates to Win 10 and especially Win11.
Often for me a Windows restart clears it up. Now and then I have to do a do a full shutdown and power up.
Hope it's that simple for you too.?
On Thu, Mar 28, 2024 at 1:20 PM, jerry-KF6VB <jerry@...> wrote: I just tried plugging my new QMX into my Windows PC.? Eager to try out that new CLI.
Windows 10 said:
The last USB device you connected to this computer malfunctioned, and Windows does not recognize it.
So then I hauled it upstairs and plugged it into one of my Linux servers - all OK.? A new device appeared - /dev/ttyACM0.
I started up minicom, and there it was!
The USB ID says it's a STM device.? Anybody know where's the Windows driver?
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I just tried plugging my new QMX into my Windows PC.? Eager to try out that new CLI.
Windows 10 said:
The last USB device you connected to this computer malfunctioned, and Windows does not recognize it.
So then I hauled it upstairs and plugged it into one of my Linux servers - all OK.? A new device appeared - /dev/ttyACM0.
I started up minicom, and there it was!
The USB ID says it's a STM device.? Anybody know where's the Windows driver?
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Update: bamboo got burned up and would not push though under any try. Finally sucked out as much as possible with solder wick and drilled the hole undersize. The kit wire would go through the drilled hole without scraping. Wound the transformer coils, carefully fashioned the single turn wires, scraped all 8 leads, test fit everything, soldered it & trimmed. Tested perfect!
--
73
Karl
KI4ZUQ
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Re: Question about New QMX, Is it a 9V vs 12V
#9v
#12v
#qmx
Hello,
I added a note for to have the radio built for 9V when checking out but the paper work that came with the radio says 12V so that is why I am asking make sure which build I have so I don't cook the radio.
Richard
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Re: Question about New QMX, Is it a 9V vs 12V
#9v
#12v
#qmx
Prebuilt QMX and QDX radios are built for 12V unless you ask for them to be built for 9V. The one opportunity that you get to add a note to your order is in step 4 of checkout, the delivery instructions page. In addition to that, you may want to send an email to customer support to make sure they know you want a 9V build.
If you have already ordered, didn't add a note at the time, and want a 9V build, email customer support with your order number.
Hi Hans,
I sent you a direct message regarding the 9V or 12V build under your presales support page. I didn't hear back from you, so I posted on boards. I didn't realize your family was sick. I hope everyone in your family is doing better. Please search under Richard Geiger for my question under presales support.
Richard Geiger
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Re: Question about New QMX, Is it a 9V vs 12V
#9v
#12v
#qmx
Hi Hans,
I sent you a direct message regarding the 9V or 12V build under your presales support page. I didn't hear back from you, so I posted on boards. I didn't realize your family was sick. I hope everyone in your family is doing better. Please search under Richard Geiger for my question under presales support.
Richard Geiger
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Frank,
A DC short to ground at the BNC is expected. A properly installed T507 guarantees that, and it is of no consequence.?
Your radio seems to have more than one problem.?
The scratchy audio and white noise is suggesting a possible IC407 problem. That can also mess up BPF and Image sweeps.
JZ KJ4A?
On Thu, Mar 28, 2024, 7:20?AM Frank Goeddeke < fgoeddeke@...> wrote: Hi All,
I think I found the problem.? I believe I would T507 incorrectly, I get continuity on 6 of the wires together and on the other two wires together.? The instructions on page 44 say to wind the 0.6mm wire "ONE time through the hole".? I was previously under the impression that one time through means one time through.? But if we want a B-B wire as in the hole locations as in PCB diagram on page 44, that is technically TWO times through the hole, although I would probably describe it as ONE AND A HALF times through the hole.? I removed the T507 and will re-wind and re-install, I bet that solves at least one of my problems, the center pin on the BNC connector having continuity with the ground.? Once that is solved I'll re-check and see if other problems persist.
By the way, I forgot to mention in my original post I am using a 12V battery, it was measured at 11.9V when I started.
Thanks!? 73,
Frank
K8FXG
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Re: New QMX Rev3 build - no power out...
Michael, one more thing... The RWTST transformation ratio may be a little different than what the above calculation indicates. No problem.
The issue is that it is a rather unconventional design which brings together properties of a transmission line transformer (the twisted pair segment) and properties of a conventional transformer (the no-twist segment).
The calculated value above should not be too far off, though, since RWTST clearly functions well in circuit.?
JZ
Michael,
Yes, a sweep of 14MHz to 30MHz is correct.
IIRC you are using the 12V RWTST transformer. The full primary has 3 turns, the secondary has 2 turns.
The turns ratio (3:2) or (1.5:1) produces a?? 1.5 x 1.5 = 2.25 impedance ratio.
With the Nano connected to the full orimary and the load resistance on the secondary, the NanoVNA will see 50 x 2.25 = 112.5 ohms.
Put into SWR mode, with all other traces turned off, you will see a nominal SWR reading of 2.25. The reading will vary somewhat over the sweep range as the transformer frequency response rolls off at low and high ends of the sweep.
You can also do this in reverse. If you place 112.5 ohms at the full primary and the Nano on the secondary, the Nano will see 50 ohms and show SWR = 1.
Hope that helps ... JZ On Wed, Mar 27, 2024, 7:50?PM Michael LaBlanc < mlablan1@...> wrote: John,
I have T501 rewired and have some test leads connecting a 50 ohm load to the secondary windings and my Nano VNA attached to the primary windings.? I am not sure which trace will give me the transformed?impedance?? Is it the resistance value?? I have attached some pics to show what choices I have to select measurement types.? Also, what frequency range should I put in for the stimulus?? Since this is a 20M to 10M radio, should I put in 14MHZ to 30MHZ?
Thank you again for all this assistance.? Knowing if this transformer is properly wound before I insert it on the board will be a huge advantage.
  
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Hi All,
I think I found the problem.? I believe I would T507 incorrectly, I get continuity on 6 of the wires together and on the other two wires together.? The instructions on page 44 say to wind the 0.6mm wire "ONE time through the hole".? I was previously under the impression that one time through means one time through.? But if we want a B-B wire as in the hole locations as in PCB diagram on page 44, that is technically TWO times through the hole, although I would probably describe it as ONE AND A HALF times through the hole.? I removed the T507 and will re-wind and re-install, I bet that solves at least one of my problems, the center pin on the BNC connector having continuity with the ground.? Once that is solved I'll re-check and see if other problems persist.
By the way, I forgot to mention in my original post I am using a 12V battery, it was measured at 11.9V when I started.
Thanks!? 73,
Frank
K8FXG
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Re: ARRL Technical Innovation Award.
Non-ARRL members can send their support
------ Original Message ------
Date 3/28/2024 3:54:14 AM
Subject Re: [QRPLabs] ARRL Technical Innovation Award.
I admit that I am ignorant.
@arrl.org ?
And can non-arrl members also send their support?
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Hi Hans,
All tight, thank you for clarification.
73 de YO3FFF Cristi
Pe mar?i, 26 martie 2024 la 14:17:49 EET, Hans Summers <hans.summers@...> a scris:
Hello Cristi
Yes correct. A high-bands QDX will work best (higher power output, more efficient) with a type FT61-202 binocular. 43 material will work but just not so we'll.?
73 Hans G0UPL
Hi Hans,
Looking closely to the QDX documentation I realize that I don't know what you mean by "be sure to use FT61-202 and the twisted transformer types". I discovered the "PA transformer manual" But there is no information in it in regards to FT61-202. So would you please let me know what is all about with this binocular? I guess you mean to use the same technique for T1 transformer but instead of FT43-202, for upper bands should use FT61-202. Is that right?
Thank you.
73 de YO3FFF
Cristi
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Re: Padded Case for our toys.
Hello,? it looks more practical to me. My old Romova photo case will be used again. With foam rubber, the waste of space is too great for me. I don't have to protect my QMX equipment from vibrations.
toggle quoted message
Show quoted text
Am 28.03.2024 um 10:37 schrieb David Wilcox K8WPE via groups.io <Djwilcox01@...>:
? I have used the Apache cases from Harbor Freight to protect all my toys when traveling or storage. I have all sizes. Amazingly they protect against even bad handling by movers, mail companies, package transfer companies. And even relatives. ?If my ship sinks or an airplane goes down it won¡¯t matter whether it¡¯s labeled Apache or other higher cost/standard case.? Be the REASON someone smiles today.
Dave K8WPE On Mar 27, 2024, at 10:01?AM, Mike KK7ER <groupio@...> wrote:
?I use one for the rig and a second one for everything else. Both stack neatly in a backpack. <dummyfile.0.part> That's a QCX mini, a QDX HB, and the 50W amp. But a QMX and NanoVNA also fit in place of the QCX and QDX. 73, Mike KK7ER
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Re: Padded Case for our toys.
I have used the Apache cases from Harbor Freight to protect all my toys when traveling or storage. I have all sizes. Amazingly they protect against even bad handling by movers, mail companies, package transfer companies. And even relatives. ?If my ship sinks or an airplane goes down it won¡¯t matter whether it¡¯s labeled Apache or other higher cost/standard case.? Be the REASON someone smiles today.
Dave K8WPE
toggle quoted message
Show quoted text
On Mar 27, 2024, at 10:01?AM, Mike KK7ER <groupio@...> wrote:
?I use one for the rig and a second one for everything else.
Both stack neatly in a backpack.
That's a QCX mini, a QDX HB, and the 50W amp.
But a QMX and NanoVNA also fit in place of the QCX and QDX.
73, Mike KK7ER
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Re: ARRL Technical Innovation Award.
I admit that I am ignorant.
@arrl.org ?
And can non-arrl members also send their support?
|
Re: Question about New QMX, Is it a 9V vs 12V
#9v
#12v
#qmx
Hello Richard
If the power output is a lot less than you think it should be, at 9V, then that would indicate that it really was built for 12V.?
If there was a mistake, I could help you. But just the name "Richard" isn't enough information for me to find anything; and I don't find anything with your email?address.
Hello,
I have two questions.
1.? I received a new QMX assembled.? I ordered a 9V but the paper work says 12V.? How can I tell if it is 9V or 12V?? I just don't want to cook the QMX with the first use.
2.? If I have a 12V QMX it looks like I can run 6 AA x 1.2v = 7.4V or 8 AA x 1.2V = 9.6 V?? Is that ok?
Richard
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Question about New QMX, Is it a 9V vs 12V
#9v
#12v
#qmx
Hello,
I have two questions.
1.? I received a new QMX assembled.? I ordered a 9V but the paper work says 12V.? How can I tell if it is 9V or 12V?? I just don't want to cook the QMX with the first use.
2.? If I have a 12V QMX it looks like I can run 6 AA x 1.2v = 7.4V or 8 AA x 1.2V = 9.6 V?? Is that ok?
Richard
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Re: Missing QMX case side
Exactly!
Many of us are way too spoiled
and way too comfortable!
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Re: Missing QMX case side
Hello Hans,
get well soon for you and your family.
1. Your wife
2. Your children
Nothing at all for a while
Then we'll get to it...
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The display on the qlg2 is unable to be customised.
Hans once said he would get round to including extras on the display info, but I think time and new ventures have pushed this to the back of drawer.
probably on his list somewhere HI
--
Dean Smith (G7EOB).
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Todd W2TEF
Karl
Shirley Dulcey KE1L
Frank G
Reinhard Gr?nz
David Wilcox K8WPE