You can use the terminal menu to set the mode with a CAT command:

open "PC and CAT", then "CAT command test", then type the MDx command to set the mode

x = 1 for LSB, 2 for USB, 3 for CW, and 6 for DIGI.

MD (without the number following) returns the current mode.

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See this post he made a few months ago with his contact info:

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Yes, those look ok, not too different from mine.

For the 6m and 15m LPFs, you may want to spread the windings on the toroids to move the filter rolloff a little to the right, which may give a little better power on those bands, but there may be some other reason for the lower power.

Need to get in touch with Jeffery Moore to get my factorey built new qmx+ which will not transmit repaired.? A Phone number or email would be helpful.??

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Thanks? Steve N1SG

Hans-

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? ?As always, great work and amazing results. The multiple virtual COM port discovery and development is quite intriguing - can I make a suggestion/recommendation? I have a QMX+ with the GPS module installed. It would be super cool if one of the those extra COM ports could echo the GPS data out to the connected PC. In this way the QMX+ w/ GPS could be used as a location and time source for the PC for time synchronization for WSJT-X modes or otherwise. When doing POTA I typically have a separate GPS USB dongle connected to a laptop for the sole purpose of time sync. If the QMX+ could provide that same functionality, via its onboard GPS, that is one less gadget/USB port needed.

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Thanks for all your hard work!

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Paul W9PEM

Thanks for this Stan. You saved me a ton of time when I tested WinLink. It worked first try!

Side effect of using VARA HF is that it leaves the QMX in SSB mode. When I go back into WSJT-X it doesn't switch to digital mode. This in spite of clicking Data/Pkt in the radio settings.

I've tried a few different Kenwood radio definitions and QCX/QDX in WSJT, but no joy.

I could just reach over and press the knob to change modes but I usually operate remotely.

I thought maybe I'd make use of the new ability to operate multiple COM ports and change the mode through the menu but can't seem to find a menu item to set the mode.?

My workarounds for now are to open Ham Radio Deluxe or one of the other rig control programs set to one of the Kenwood radio definitions and click the mode button to select FSK. Or use terminal access, go into CAT Test menu, and hope I can remember that the MD 6 command will set it back to DIGI.

Maybe this is a minor bug related the addition of SSB and LSB modes? I don't recall running into this when the only options were CW or DIGI.

Hans, any chance you could add a Mode Select menu option?

--

Randy, N4OPI

On Tue, Apr 22, 2025 at 09:17 PM, James C. Hall, MD WB4YDL wrote:

But what if I decide to use say, a FT-818 that might use RF detection

Keep in mind that ANY RF detection T/R switching scheme is going to unavoidably hot-switch the transmitter while it is putting out power.

Best to use wired switching if possible.? The '818 has a TX closure to ground available at the ACC connector.

73, Don N2VGU

Hi,

?

The driver support for Windows 7,? and Windows 10 and 11, is different.?

Check the internet for work arounds or perhaps YouTube.?

There were drivers available for my Windows 7, but I never got them working properly.

Upgrading to Windows 11 with a purchase of a small Mini PC will save a lot of aggravation.?

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George

I think the LPF scans look good overall.? Here are a few examples:

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Those are for the 3 least powerful bands, and they generally look pretty good to me.

I ended up sending my rig over to Jeff W1NC. He was extremely helpful and get my rig sorted out. I highly recommend anyone plagued with issues after assembly make use of his service if you're looking for help. Here's what he had to say about my situation:

Both SMPS boards had peaks of solder that would cause short circuits below - reflowed all connector joints

I was not quite able to detect these issues with my skill set / tools at home. I think the problematic area was the bottom of the connectors facing the main PCB. Thank you all again for your input and assistance in this thread. Excited to get on the air and take the QMX for a spin.

73!
K4HYD

Hi all,?

Just got a fresh QMX+ assembled and finally got it on the air.?

After a couple days of fussing I finally got FT8 working on WSJT+. Im small tuner from my ft817 which is manual to tune.?

All good and the power icon shows full power as FT8 does its thing.?

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On CW the decoder works and the keyer sometimes goes to sleep (wont work) when sending. A power on/off brings it back.?

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My question is when sending CW should the power icon be 'pulsing' when it transmits a character??
The sidetone is working but I cant tell if it Is transmitting.?

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Any help?

--

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Charlie C. ?- K2CMC

LICW/SKCC/NAQCC?

QMX and WA3TFS amplifier are working quite well together.? Earlier this evening I made 3 contacts on 20M SSB hunting POTA activators in FL, CO, MN from East TX with 57, 55 and 59 reports.

--

73,
Jim - AE5JE

Hi Hans

Just a minor point.? I have found when having 2 com ports open at the same time i.e. Putty and WSJT-X, the 'microphone test' in Putty doesn't work - there may be a couple of bars but it stops at that point.? However on closing one of the ports, the 'microphone test' functions properly.

Cheers

Greg, ZL4GW

Hi Ludwig

Re your problem with WSJT-X.? I experienced the same problem BUT it was with ver 003.? The 'error in sound input' seemed to arise with no input from me - it just happened occasionally.? However I did find that the latest Hamlib update seemed to cause this error so I rolled back to the earlier version and now have no problem even with QMX+ ver 004.? This may help with your problem.

Regards

Greg, ZL4GW

Same here.

On Thu, Apr 24, 2025 at 12:01 AM, Stan Dye wrote:

So there probably isn't a problem with this part of the circuit.

Stan, maybe, maybe not. You are right, it's better to check this place.

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73 Ludwig

Thanks for the note. Maybe next time the conditions will be better and we will be able to have a QSO.

Ed

AB8DF

Hello ...

After installing 004, successfully, I've got 3 new com ports, 3, 9, & 10.

All of them allow CAT control of the WSJT software.

Decodes are happening and I have made a number of US and DX contacts today.

But, and there almost always is one, after about 8-10 minutes, the new com ports "go away" and WSJT stops working and wants connections repaired.

Shutting off the QMX+ and turning it back on restores the ports, for another 8-10 minutes.

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Anybody else seen this behavior after updating to 004ssb?

The radio plays nicely with WSJT for hours at a time with 003ssb.

Thanks,

Dick, K5AND

Another excellent idea, Jim. If I can’t find those special TRS jacks, I’ll do exactly that !

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Thanks much !

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73, Jamie

WB4YDL

Thank you for the description, Ludwig, I now understand how the controller input may be limiting this voltage.? For some reason I wasn't thinking about it correctly.

So there probably isn't a problem with this part of the circuit.

Stan KC7XE