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I will add to what Dave has written that I don't recommend the PD triggers with the voltage and amperage indicators built in. The generate a small , but regular RF beep noise un the radio every time

Thanks for the confirmation Steve.

I didn't realise the QMX+ would demodulate ssb, I thought with the great narrow filters it was optimised for cw. I must give it a try when I get back to my rig. Paul -- G0TXL (Paul)

Hi Dave, I am curious what type of RFI you experienced, I have not experienced any with my 3d printed top.

Nice work, Chris! Those NanoVNA traces are excellent, as is your 3D print case. -- 73, Dan? NM3A

On amazon I went with a linear power supply. It has adjustable current limit that trips if something goes wrong. *I think you need a supply that can put out something approaching 5 amps @20vdc* I

Hi, A few features/quirks that I have noticed with several different PD compatible power banks. ? ? ?All power banks will automatically turn off after a time out period if the load is below a

Chris, Thank you for this post.? My QMX had the "dancing" SWR issue. A Factory reset calmed it. Where the SWR was varying 1+, it is now varying? 0.01.

Hi Joe, I use my MacBook Pro with Sonoma to connect to my QRPLabs Radios. The radios just connect with a USB cable and there is no need for Macports or any other software. See below for my macOS use

While working on another problem I had a strange issue with bad QRM coming through the radio.? I tried a number of things, swapping around coax, adjusting location of things, but couldn't supress

Hi folks, I've enclosed a few photos of my fix for the SWR/EFHW problem. The images show the choke I wired up (with -30dB suppression on the NanoVNA), and a little box I made to hold it all

Hans, Thanks for the response. These PCM1804 failures are puzzling. Jerry, KE7ER

It's normal to get slightly higher output power on the lower bands, for the same input voltage. 72/73 de Enzo M0KTZ

Thank you Dan, your input is much appreciated. 73 es dx.

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You need a trigger board or cable. Just make sure to plug it in to your PD power bank first, so it will make the negotiation before plugging into the radio. -- 73, Dan - W2DLC

Hello Jerry It's wrong. I also thought like you, however I was not informed by my team until recently, that QDX had been failing their pre-shipment testing. It seems that our testing of QDX and QMX+

Is the QMX *itself* in any way capable to negotiate the required voltage with the power bank PD? In other words is a 12V trigger cable required or not? I feel more comfy with a trigger cable as it

Beautiful work on the 3D printed case BUT: I was doing some testing with my QMX+ outside of the case and with any transmission the RFI interference caused problems that disappeared when I put it back