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what are the connection to front panel i have lost track of the +12volts

Just finished my QMX Midband V4 build. I built it for 12 volts. The audio and RF sweeps are almost exactly as in the manual. Battery was at 11.2V Power from diagnostics as follows: 60 meter 5.3w 40 meter 4.3w 30 meter 4.3w 20 meter 4.2w 17 meter 3.8w 15 meter 4.9w I was using my QRPoMeter as the dummy load. Am I at risk if I run it at 12v. My pack is 3 cell Liion 5000mah (12.6 charged) with inline diode to bring it back to 12.0v. Thanks John KY4WW

i had a short between the two left front of jp110 i can't wait to see output of tx on a spectrum analzer im 84 this year an so be cool.

Big thank you to Jeff Moore. Fixed and set up my QMX Plus. Works great. Super-fast service. He's a tribute to the ham radio community. You're the best. Gary W0CKI -- Gary W0CKI

Hey all! I’m not saying it would be an ideal situation or anything, but does anyone know if/when we will be able to use the onboard mic for ssb operations? I really love the portable nature of my kit and don’t mind using the onboard mic. Thanks! 73 Jeff KB3TVP

Just completed troubleshooting a couple of items on the QMX-mini build and the unit now up and appears in good shape except the backlight doesn't turn on. I've rotated the LCD pot all the way which changes character brightness but without the backlight illuminating. I have the backlight set to 'on' in the menu system. Is these somewhere obvious I can trace the issue ? I imagine the signal from the processor to the LCD to turn on the backlight is not getting through but I'm not sure where to start looking, which pin on the LCD is connected to which pin on the processor (IC2). Any help is appreciated.

I sorry you mistook question I'm looking for 12volt input mine is burnd out do my error.

can you tell me connections to front panel on qmx+ I doun't have +12volts

The wiki page Home has been updated by @Ludwig_DH8WN <DH8WN@...>. Compare Revisions

The wiki page QMX QMX_plus Debugging has been updated by @Ludwig_DH8WN <DH8WN@...>. Compare Revisions

Hi Guys, the SSB modus for the QMX is awesome. Even with a small Magnetic Loop antenna. I?m Using a microphone of the QRP-GUYs from California, USA. At the Antenna connection (bnc) I also use a LED SWR bridge from the QRP Guys. So I can tune my magnetic Loop antenna with full power about 4 Watts with 11V Supply(3 Watts keep in the bridge resistors..lol, 1 Watt will be used for the measurement) . When the LED goes out, I can switch into the operation mode. I NEVER switch of the SWR Protection off (SWR3 in the Menue of the qmx). Has anybody an idea, if the internal microphone can be activated in the nearer future or will there maybe have to do any hardware change ? enclosed my video :) : https://www.youtube.com/watch?v=NKZ_0NkJAIA By the way, I?m using a DC-DC converter to reduce the voltage to 11-11.5V . And yes, it doesn?t make any noise, believe me, Its a quality module from an european electronic supplier and not a cheap piece of sh.. from Temu ! Im using toroids around the voltage supply cables (lpf). Have much fun with the QMX. YOu really did a great job Hans , 72 de Matt, DL1SER

Is it possible to build a QMX that would cover 40, 30, 20, 17, 15, 12 & 10? I’d much prefer that instead of 60-15. Don W6CZ

Hello. While I await my QMX+ to arrive so I can experiment, I joined this Group and searched for a few topics that come to mind, but did not find much information. The users here are very knowledgeable about the QMX+ and I am hoping others will provide some insight to these questions. Thank you all in advance: 1. Can the QMX+ be controlled by Thetis? 2. If yes to question 1, do "Radio Model" profiles for the QMX+ exist in Thetis? I only see Hermes and ANAN profiles. 3. Will the developer kit allow the addition of an Ethernet connection? 4. If yes to question 3, will it also allow PoE? 5. Could the QMX+ be powered by USB-C? 6. Could WiFi be added to the QMX+? 7. Can the QMX+ be operated remotely over the Internet? 8. Can a USB microphone connected to the PC be used with the QMX+? 9. It appears that the QMX+ makes use of some form of pre-distortion. Can this be used with an external amplifier (e.g., Mercury Lux)? The Hermes Lite 2 has an additional SMA connector for Pure Signal. I don't see one on the QMX+. 10. Any heat concerns with high-duty cycle modes (e.g., FT8)? The Hermes Lite has a heat sink shim that dissipates heat via the enclosure. I did not see anything like that for the QMX+. I really like my Hermes Lite/Hermes Lite 2+ but appreciate the wider band coverage and some of the intelligent engineering present in the QMX+. I look forward to experimenting, but hopefully others further along in this journey have already sorted out answers to the above questions. Thanks in advance for any replies. 73, Frank - KG9M

I don’t know if anyone else has experienced this, but I was checking out FT8 on 10M and the audio levels were in the red -too low, with no decodes, despite seeing faint signals on the waterfall. I’m using a Surface Go tablet with Windows 11 Pro. I’ve checked the recording control in Windows and it is maxed at 100%. I’m using digi mode and usb audio from the QMX+ plenty of level and good decodes on the lower bands Nick G0OQK

Can anyone kindly inform about the M3 black screws used in the QMX+ case ? what'is lenght ? 6 mm 8 mm ? This afternoon after assembly and performed all tests i was presented with 8 black screws that dit not fit, they are M2.5. In the assembly manual is stated they are M3 but no info about lenght. Ahh, by the way the QMX+ worked first power on but with a garbled screen. Had to disassembly the front panel and retouch the LCD pins. Its a big PITA to properly solder them by the manual. Now everything is ok. Greetings //Eduardo

no band change