Re: Here's hoping for QMX+ v2
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This reminds me of what I did with my QCX.? If I had a top case with correct size hole for the display it would look professional, as is I have to remove the cover to see the display.
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The touch screen part communicates with the radio via CAT, so there were no changes to the QCX source code.? The same could be done with the QMX I suspect.?? I processed audio separate from the QCX with an option to mux in the QCX audio or the SDR audio, that wouldn't even be needed with the QMX.
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Re: Here's hoping for QMX+ v2
Hi Jack et al
Thanks OM, encouraging comments :-)? I wouldn't be too concerned about Hans workload. Think about it. He has over 10,000 QCX-and-family radios out there and they all work "right out of the box". This includes the "standard" QCX, the "mini" QCX, and now the QMX.?
Gross underestimate :-)? ?To be strictly accurate: ? 21,343 QCX-series (QCX, QCX+, QCX-mini), debut August 2017 9,347 QDX-series (QDX, QDX-M), debut October 2021 8,922 QMX-series (QMX, QMX+), debut May 2023
So yeah, don't worry too much, I am used to a high workload... but rest assured: whatever new thing I develop, if and when, I will do so very quietly to avoid any pressure and stress; so you guys speculate all you like, but don't?expect any hints from me!
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Hello Marek,
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please read my post from a different thread.
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Maybe there is a medium value resistance between neighbour pins. If you put voltage at this place the value may change after a while. And maybe, the value changed during some months since building slightly to the worse.
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73 Ludwig
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On Thu, Apr 10, 2025 at 04:44 PM, @Ludwig_DH8WN wrote:
pin 3 up to pin 15 (2 - 4, 4 - 5, ..., 14 - 15).
Sorry, typo!!!
Correct is 2 - 3, 3 - 4, ..., 14 - 15.
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On Wed, Apr 9, 2025 at 04:57 AM, james jones wrote:
Touched up all display board connections and now I get two lines on the right side of the display.
Jim, so something was wrong in this area. Maybe you fixed not all. A missing connection is bad and also some unwanted connection between pins. Such an unwanted connection between neighbour pins may produce what you see.
Please check resistance between neighbour pins starting from LCD pin 3 up to pin 15 (2 - 4, 4 - 5, ..., 14 - 15). The value should be very high. Check the display board alone and connected to the mainboard.
Not only a short but also a higher resistance could bring problems. (And if you will find a problem I guess it's around pin 7 ... pin 14).
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73 Ludwig
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Maybe the reason he blew up the BS170s during calibration is because Q507 was dead already.
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Tony
AD0VC
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
On Thu, Apr 10, 2025 at 01:36 AM, Steve M wrote:
Given that I fried one of the BS170s in the PA doing the SSB calibration, It is possible that Q507 was also damaged.
Steve, I'm not sure about the BS170 but 99% sure Q507 is dead (only some silicon wire).
Yes, a broken BS170 could affect Q507. There is a small possibility some parts to drive Q507 are broken but every time I saw a situation similar to yours Q507 was dead. (I repaired some QMX for other users.)
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73 Ludwig
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I’m fairly certain all the pins are soldered on both sides. ?My question is why the display is “corrupted”. ?Processor must be working to some extent. ?
Thanks for the response.
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On Apr 10, 2025, at 6:45?AM, Daniel Walter via groups.io <nm3a@...> wrote:
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Jim,
?It can be done before mounting the display board to the front panel. That's what I did. Doing so requires a little thought and a couple of extra assembly/ disassembly to make sure everything will fit once you go to mount it to the front panel.?
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73, Dan? NM3A
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Re: Here's hoping for QMX+ v2
I wouldn't be too concerned about Hans workload. Think about it. He has over 10,000 QCX-and-family radios out there and they all work "right out of the box". This includes the "standard" QCX, the "mini" QCX, and now the QMX. The father of the QMX was at the YOTA conference in Africa in 2018. Why the 7-year lag? Because Hans doesn't release a product until he's convinced it's bullet proof. He front-loads the hardware/software work before he releases it, which means he doesn't need to do much in the way of support/debugging after the sale. Is he working on a QMX version with a touch display? Personally, I doubt it because it would be such a large departure from his low-power consumption transceivers. He is the King of the QRP-CW pond with a price-point that's damn near impossible to beat. The QMX might be his only foray into the SSB end of things. I don't see him jumping into the G90, FX-CR4, ?SDR, and sBITX pond.
As Mel Brooks said once: "It's good to be king."
Jack, W8TEE
On Thursday, April 10, 2025 at 09:34:17 AM EDT, va3rr via groups.io <va3rr@...> wrote:
zBitx current on receive is 300mA, so I tend to agree with you, Jerry.
OTOH, the QMX is my preference for portable work due to it's smaller form factor compared to the QMX+.? I'd be concerned about Hans workload if he had to support coding for 2 different styles of display, and all the change requests that would follow...
72 de Russ, va3rr
On Thu, Apr 10, 2025 at 09:18 AM, Jerry Gaffke wrote:
> For portable use, doing everything through the front panel and and the small
> display there keeps power requirements low.
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Re: Here's hoping for QMX+ v2
With appropriate STM32F firmware, Hans need no further involvement in developing that RPi-Zero+Display.
Something interested forum members could do.
Hans could concentrate on making the QMX bullet-proof, maybe a bit more power, some stand-alone digital modes would be nice.
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Jerry
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On Thu, Apr 10, 2025 at 06:34 AM, va3rr wrote:
OTOH, the QMX is my preference for portable work due to it's smaller form factor compared to the QMX+. I'd be concerned about Hans workload if he had to support coding for 2 different styles of display, and all the change requests that would follow...
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If you're trying to get the under 5 W bonus in a contest and you know you're running 6 W that's at least an ethical problem.
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I solved the "12 V" LiFePO problem with an adjustable regulator. My QMX was putting out over 5 W even with 12 V in, so I just ramp it down to 11 V now.
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Re: Here's hoping for QMX+ v2
zBitx current on receive is 300mA, so I tend to agree with you, Jerry.
OTOH, the QMX is my preference for portable work due to it's smaller form factor compared to the QMX+. I'd be concerned about Hans workload if he had to support coding for 2 different styles of display, and all the change requests that would follow...
72 de Russ, va3rr
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On Thu, Apr 10, 2025 at 09:18 AM, Jerry Gaffke wrote: For portable use, doing everything through the front panel and and the small
display there keeps power requirements low.
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Re: Here's hoping for QMX+ v2
Samantha,
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For portable use, doing everything through the front panel and and the small display there keeps power requirements low.
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> ?Wouldn't it be loverly if the next version of the QMX had a display like the zBitx.?
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May be possible to do all you want by adding an RPi-Zero and a screen of your choice into the top half of the QMX+ clamshell.
Hans plans to add more firmware features to the QMX, allowing more control via UART and USB.
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Jerry, KE7ER
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Bruce, my QMX arrived a few months ago into Connecticut via DHL without any brokerage fee.? I wonder if this falls under De Minimis (no tariff) which may mean no brokerage required either.? From online:?
What is the de minimis rule in the US?
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The United States is eliminating de minimis for China and Hong Kong starting May 2, 2025. The de minimis exemption provided by 19 U.S. C. § 1321(a)(2)(C) (aka Section 321 shipments) allows one shipment of goods (per person, per day) valued at or under $800 to enter the U.S. free from duty and import taxes
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I am in the USA and ordered a QMX+ last week thinking it would come from MO.? It was shipped from turkey.? Now I am really worried as I have heard Fedex charges really outrageous (like $75) brokerage fees.? ?? i will post back once I receive
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Jim,
?It can be done before mounting the display board to the front panel. That's what I did. Doing so requires a little thought and a couple of extra assembly/ disassembly to make sure everything will fit once you go to mount it to the front panel.?
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73, Dan? NM3A
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Re: QMX and power bank PD
Just by way of update, I received the power bank yesterday. I hooked up my QMX to it using the USB-C to DC cable and voltage meter items I purchased and linked above, and also a 60w dummy load just to keep things safe. I then added a Putikeeg (sic?) paddle keyer to the QMX and tried some random dits and dahs.
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It looks to me that on TX it's putting out about 8.64v maximum when hitting the paddles and drawing 12.01v for powering the QMX in general. From what I can see, with my extremely limited knowledge, this looks to be working just fine and more importantly it's working safely?
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Matt, be happy with what you have. The levels you report are very typical of the QMX line. No one will EVER tell the difference between 4.5w and 6.1w. The difference is miniscule. And, no one in the QRP community will notice either. Your antenna blowing in the breeze will cause more variance than those power differences. Look for some YouTube videos comparing different power output levels and you'll discover that doubling the QMX output power will, at best, be less than one half an S-unit at a receiver.? What you are trying to do is like counting Cherrios in your cereal bowl.? Instead, continue enjoying these tiny remarkable radios.
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P.S. I just had a POTA contact yesterday between Central FL and San Diego using a backyard vertical and a new QMX+ with 3.98w on 20m.
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72 de N4REE, Bob Easton - QRP CW forever
https://bob-easton.com/n4ree
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Here's hoping for QMX+ v2
Wouldn't it be loverly if the next version of the QMX had a display like the zBitx.?
Hans has done some amazing work with the QMX, with SSB and with bringing us some absolutely amazingly good quality radios and kits that definitely punch above their weight class.
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Thanks for everything you've done Hans. Can't wait to see what comes out of the QRP-Labs stable next.?
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jjpurdum
va3rr
N4REE - Bob