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The QMX connects to the computer via USB using a virtual COM interface. To do this, it needs a driver that is usually included in Windows. In November I bought a computer (ACE Magican, Windows 11 Pro)

Hi Chris; There is no heat in IC204 right now. Thanks.

This was a problem with the early QMX boards, as you say missing resistors.? It was fixed in later QMX board versions and the QMX+ and by a number of people who fitted the resistors.? When you do

Did you hit enter when the initial blank screen appears? Roger 8P6RX ?Get BlueMail for Android ?

I can't get PuTTy to work when using the diagnostics screen on my newly built QMX+. I've reloaded PuTTy twice, and I've reloaded v26 and v27 firmware as described above. When I go into the

I used generic TO220 style linear regulators for my linear SMPS replacement, had to trim the tabs a bit but they are rated for 1A and while they get warm seem OK. As Jerry says the ADC_* lines need to

It looks as if it failed initialising the Si5351, as the message says.? This is actually a MS5351M, IC204, does it look burnt or is it hot? IC201, an EEPROM array uses the same I2C control so a

Same problem here.....? QMX+ 6 meters FT8 waterfall Phil.? G4JVF

I could not find it at Amazon. Perhaps it is discontinued. Thanks anyway. 73! de Bekir TA2RX 8 Oca 2025 ?ar 08:54 tarihinde Karl via groups.io <karlshumaker= [email protected]> ?unu yazd?:

Hello Chuck Since there is absolutely nothing I can do to fix software Have you tried some of the settings people suggested in this forum? I am not sure who you think is on the group who is on my

Hi Greg; I opened the device and I can smell a burning smell inside, I think we burned something. Thanks.

Hi Alan; QMX+ Hi, I opened the device and I can smell a burning smell inside, I think we burned something. Thanks.

No problem, Ludwig. The part I quoted is the one I used when repairing my QMX (rev 3). It fits correctly. Cheers, Ronan. MM0IVR

I made it from parts from Amazon. The prototype printed circuit board is just a bunch of through-plated solder pads to mount and connect every type of USB receptacle. It is powered by a 5 volt wall

Signals ADC_5V and ADC_3V3 back to the host should be a bit high by maybe a tenth of a volt. If the processor doesn't see a high enough voltage,? it waits until it does before running any further

Hi, Stan and Cal. Happy New Year. Please add me to the list for a full version. Just in case. Thanks 73 Ray ae5hn

Donald, most MOSFETs have an internal diode, so the flywheel diode is not absolutely necessary for a small low-voltage relay.? If the relay has a large coil or runs off higher voltage, yes, I would

Yup, never been able to use straight c to c... I think it's missing a resistor to tell the computer to just treat it like a basic USB device. Whenever I have used it on my USB c laptop I have had to

These two observations tell me that your problem is 'to the right' of the capacitor.? If it was 'to the left', i.e. towards schematic page 5, grounding the input side of the capacitor would also have

Chuck Harris via groups.io <cfharris@...> wrote: But sticking the probe didn't change anything in the audio. Wouldn't it do it, if this was the cause? Anyway, an update, if