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Could it be that in Windows the data and command endpoints must be allocated pairwise? Or Windows requires that command endpoints must exist even if not used. -- 73 Matti OH6BEX

yes, I'm sure that is the case. Must have happened during the factory reset just as power dropped showing a blank LCD. I've ordered another IC2. Jeremy

“Use original IC” usually means that IC2 lost its EEPROM file. You may have to get a new chip to fix it. Sorry… Ron [email protected]> wrote:

Miguel, thanks for the tip on using Voicemeeter to fix the USB volume. For some reason the VARA-HF modem software does not put full-scale audio into the QMX USB sound device (at least in

Nice.? I have had my QMX out for several SOTAs this year.? Mostly work CW.? Here is my setup.

First, make sure the PTT is working. - put qmx in digi mode, on vfo A - press the flrig PTT button, and see if a dot appears under the A while PTT is on - that means PTT is working - if not working,

Hi Ludwig I agree, something must be amiss. But somehow Linux is making sense of it and Windows isn't! Don't worry, I'll find it! George, QMX is already a powered hub, in effect. Cascading hubs

Hi there, Would a powered USB hub, be practical or does that add more issues? Thank you, George K3GK

One more information: For FW 003 also a working composite device with the same VID and PID is shown. So both the composite device and the underlaying device was found. For FW 005 only the composite

I have the same problem (Windows 11 PRO)

One more information: When QMX is on the device manager it shows a non working USB composite device (translated from German). The Hardware IDs

Yeah good question, Ludwig. I didn't think there was any difference. Mode 1 (1 serial port) in 005 is supposed to be exactly like 003. Just Audio + Serial and no change. I will have to investigate...

The same (?) problem here. After loading FW 005, restart, Menu ... USB serial ports 1, QMX off - on, check if 'USB serial ports 1' --> device manager shows no related COM-port and no related audio

Beste om's Als ik bij de qmx+ gelijktijdig bij gigantische de pwr en menuknop indrukt "intialiseert de setup Eeprom", alle instellingen zijn weg, is dit een bekende feature? Of een bug in de firmware

No COM ports on Win 8 as well as on Win 10....

Oh. Well that's frustrating... 73 Hans G0UPL http://qrp-labs.com https://buymeacoffee.com/g0upl [email protected]> wrote:

Thanks Ron, I re-worked a few solder joints and was able to bring things to life. Performed alignment and places in case, but now have a couple of other issues to troubleshoot. 1) on power-up, LCD

Yes I restarted it. No com ports. I just went back to 04 and the ports are there again. Tony ________________________________ Sent: Friday, April 25, 2025 10:56 AM To: [email protected] Notification

Did you restart QMX? The COM ports setting takes effect oniy on the next time QMX is powered up. 73 Hans G0UPL http://qrp-labs.com https://buymeacoffee.com/g0upl [email protected]> wrote:

Re: fw 005 and Windows 11 com ports. No com ports are recognized all get the "The last USB device you plugged in malfunctioned" using 1,2,or 3! Falling back to 003.