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Hi Pierre. Since you indicated a reference frequency of 25 MHz, Bruce correctly assumes you have the TCXO option installed in which case you shouldn’t need to worry about calibration. If you don’t

Hi! I recently posted about having some bad reception on my qmx after updating the firmware... Well it seems that it is something related to the hardware of my unit. I checked the RF filter sweep and

The JP218 jumper wires are well clear of the SMA connector, in front of it, not underneath at least on the Rev 3 boards. Maybe this was moved on the later PCBs. > > > > Chris, G5CTH

Stan, thank you for such a detailed dissection of this problem! I'll have to try the fix you described, today, at least the fix that doesn't involve a terminal, as I don't have the extra time (or

Radio-related aspect... Heard island is on the tariff list, I was reading this BBC article https://www.bbc.com/news/articles/cly8xlj0485o and thought woaaahh, no humans have visited in over a decade?

0.8 A is to much. To start the controller you need Vdd at around 3 V. This voltage could be produced by IC101 but I guess there is a fault in the chain before. Pleas read QMX QMX_plus Startup (

Well ... The newly signed hit list showed 10% for Turkey.But so far the reality has been changing almost daily. Bumpy road ahead is about all I'm sure of to be honest. I did see that there are

Turkey isn't part of the EU And it isn't clear if or when or how much, tariffs will apply to small personal imports. There was an attempt in February to abolish the $800 deminimis for small personal

Wait.? Not yet a member.

Will USA tariff laws affect the import pricing of Hans’ great radios/kits into the USA?

Hi Tonight ZL4MDX and I made our first QMX+ to QMX SSB contact.? Myles, ZL4MDX is about 200km away.? Started on 80m and moved to 40m where signals were a bit stronger.? We both agreed that the QRP

Thanks Stan. That power supply was labeled as 12 VDC output (just a wall wart). I was a bit surprised to measure 13.4. The reminder and caution on using it is appreciated. It isn’t the one that was

One thing I've noticed is that the Transmit EQ has a default Global Gain of -20.? Setting this to 0 seems to help with the gain.

Hello Stan, Ludwig and Kevin, I did'nt give up!?I ordered a mid-band QMX kit and it works good (but produces little bit too much power (6+ W) on 60 and 15 meters). The QMX+ rev 3 does not start.

Hans, I appropriate the reply but wasn't expecting you to post back as I know you're away on your holiday. Thank you though. :-) Cheers, Mel. M0KMD.

How can you tell?? You need to be monitoring the frequency to see if it is sweeping. Chris, G5CTH

Hello Mel > @Hans, any theories as to why this is happening? > No theories. But I'm on vacation right now so can't investigate anything. Even when I'm back in the lab on Monday I have a lot of

Hi Jack, Did you go through the calibration cycle or just run with default calibration settings? It's just that I can get my QMX+ to do a complete successful calibration run and resulting in

What is the voltage on the VBAT line?? This is available on JP218, the three pin connector under the GPS module, the pin labelled 'Batt'.? It needs to be about 3V from the CR2032 battery, even when

From my experience, it seems random. I got it to complete to about 2000 on one occasion after tinkering with the band settings for 20m. Without changing anything else, the next run only got it about