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QMX+ External Mic

#qmx #ssb

Paul - AI7JR All Messages By This Member #141704 Just updated my QMX+ to 01_01_003 Beta. Plugged a modified Baofeng mic into the front panel and tried running the microphone test. It doesn't seem to work. ? I can tap on the front panel, and that seems to get a bit of a response, but the mic is dead. Also, in USB/LSB mode, PTT doesn't switch to transmit. Hardware diagnostics indicate that the mic's PTT switch is working. Can see that the diagnostic notices the mic's FET... ? Unplugged and powered the mic from 10V through a 2K resistor. I can see audio with my scope, so that looks like it's working. ? Is there a setting I need to change, for the external mic to work? ? TIA! Paul -- AI7JR
Stan Dye All Messages By This Member #141705 Menu -> SSB -> Input -> Ext. Mic ? But it sounds like your mic cable is wired backwards.? Mic signal needs to go to ring, ptt to tip.
xyroto All Messages By This Member #141715 To Whom It May Concern, When will SSB be ready???That was another endless topic. It's now put on clothes.? Just curious is there room for DIP switches to juggle a microphone connection?? (I went through this concept with another branded kit when I first started.?Turned out that one already matched my desire.)? Could it be on the QMX+ developer board? 73s Paul KY4XJ. On Wednesday, March 26th, 2025 at 01:25, Paul - AI7JR via groups.io <paul.hanchett@...> wrote: toggle quoted message Show quoted text Just updated my QMX+ to 01_01_003 Beta. Plugged a modified Baofeng mic into the front panel and tried running the microphone test. It doesn't seem to work. ? I can tap on the front panel, and that seems to get a bit of a response, but the mic is dead. Also, in USB/LSB mode, PTT doesn't switch to transmit. Hardware diagnostics indicate that the mic's PTT switch is working. Can see that the diagnostic notices the mic's FET... ? Unplugged and powered the mic from 10V through a 2K resistor. I can see audio with my scope, so that looks like it's working. ? Is there a setting I need to change, for the external mic to work? ? TIA! Paul -- AI7JR
Donald S Brant Jr All Messages By This Member #141726 On Wed, Mar 26, 2025 at 08:52 AM, xyroto wrote: Just curious is there room for DIP switches to juggle a microphone connection? I just fabricated a male-female 3.5mm stereo crossover cable to adapt my existing mics to the radio, leaves everything unmolested.?? ? I often use zero Ohm chip resistors for PCB "switches"; while less convenient to change position, they take a lot less room than an DIP switch or header pins/shunt arrangement. ? You might also consider cutting and jumpering your radio to suit your mics for a permanent, 'zero mass" fix. 73, Don N2VGU
Mike Krieger All Messages By This Member #141736 QMX+ has no DIP switches. Check QMX documentation for microphone application. Mike Krieger toggle quoted message Show quoted text On Wed, Mar 26, 2025 at 8:52?AM xyroto via <xyroto=[email protected]> wrote: To Whom It May Concern, When will SSB be ready???That was another endless topic. It's now put on clothes.? Just curious is there room for DIP switches to juggle a microphone connection?? (I went through this concept with another branded kit when I first started.?Turned out that one already matched my desire.)? Could it be on the QMX+ developer board? 73s Paul KY4XJ. On Wednesday, March 26th, 2025 at 01:25, Paul - AI7JR via <paul.hanchett=[email protected]> wrote: Just updated my QMX+ to 01_01_003 Beta. Plugged a modified Baofeng mic into the front panel and tried running the microphone test. It doesn't seem to work. ? I can tap on the front panel, and that seems to get a bit of a response, but the mic is dead. Also, in USB/LSB mode, PTT doesn't switch to transmit. Hardware diagnostics indicate that the mic's PTT switch is working. Can see that the diagnostic notices the mic's FET... ? Unplugged and powered the mic from 10V through a 2K resistor. I can see audio with my scope, so that looks like it's working. ? Is there a setting I need to change, for the external mic to work? ? TIA! Paul -- AI7JR
Daniel Conklin All Messages By This Member #141740 If you have a QMX+ then there's lots of room to experiment. It's your radio, so have at it. -- 73, Dan - W2DLC
Paul - AI7JR All Messages By This Member #141744 Well, that would explain it! Thanks for the correction! ? Paul On Mar 25, 2025, 22:43 -0700, Stan Dye via groups.io <standye@...>, wrote: toggle quoted message Show quoted text Menu -> SSB -> Input -> Ext. Mic ? But it sounds like your mic cable is wired backwards.? Mic signal needs to go to ring, ptt to tip.

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