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I see you mentioned the red light, so it must be the QDX. So how did you check the voltages and frequencies? -- 73, Dan - W2DLC

Jim,? I think we need more details. Is this a QDX or QMX? You can't monitor 5 volt and 3 volt supplies in the serial app on the QDX, and you can only see the TCXO output. Also, what happened leading

Stefan, Yes unless you ask for 9 volts on the order page. 73 Alan G4ZFQ

As Ivica says, you need to be a member of the 'dialout' group in Linux or you will not be able to write to the com ports. 73 -- David Thomas M0OOR

Probably security issue, in konsole sudo adduser $USER dialout Restart, then try again

Hmm... completely silent on reception except for some loud beeps on some bands, A short TX on 20m in a dummy load with a qrp watt meter in between shows no TX and no changes in amp use CAT control

Hi, I have ordered an assembled QMX and am now waiting (more or less) patiently. I do have a question on the units that are assembled by QRP Labs. I believe they are assembled for 12v input voltage,

My QMX has the VDD fail problem.? I doubt it is financially worthwhile posting from UK to USA even if Jeff is prepared to handle the inevitable paperwork. I lack both expertise and a steady enough

The SWR is measured by the T507 and the components around it - you could check carefully to make sure that none of the nearby components has been disturbed. SWR is also affected by the efficiency of

I removed the BNC connector, but I didn't measure any short on the connector. I also rewound T507 and rewound T501 for 12v. I ordered a nes BNC just in case.

Forgot to mention that this is a REV 2 pcb. Jim W7LS

I can't even communicate with it over usb. Red light not on. Draws only about 60 mA. Using PUTTY com pgm. Checked for 5 and 3v supplies. no problem there. Si5351 putting out 24 MHz or so. TCXO putting

Whenever I try to copy over firmware, after it completes copying, I get the message saying access denied. I have tried to change the permissions but that doesn't work.

Hi Dan, That's interesting. I have a mini J38 key plugged into mine. I wonder if leaving it connected to the Windows tablet PC is partially to blame? Or are there buffers which get loaded up when left

Very helpful! This is great information. I have a bunch of components in route and I think I should have everything to implement your recommendations, and maybe a bit more. Still trying to wrap my

Thanks Ludwig, I have done the jumper thing and was able to see QMX in my file manager. On entering it I now see the EEPROM file as well as 1_00-27.QMX. So all appears well and what's expected. But

That's not bad,? but I did a bit better. I placed my order was on Tuesday afternoon, package was at the front door in Canberra, Australia, on Monday afternoon of the next week. 6 days. Excellent

Barb, After I have incorporated your latest suggestions - PCB looks like this. Battery interconnections are 5mm thick (and short). For the connection between -U4 and +U5, since I had an opportunity of

Excellent! From that display, the processor is working properly. Let us know how the receiver check goes. Next step might be running the diagonstics?through a USB cable to a host computer as

Two interesting links: https://www.gqrp.com/harmonic_filters.pdf and https://www.arrl.org/files/file/Technology/tis/info/pdf/8809017.pdf 73 - Pierre - FK8IH