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That's so dead that it seems to be more than bad L401 or T401 soldering, not sure it would look that bad with them not even fitted. It doesn't seem to be detecting any signal at all. This might

If it were me I'd redo T401 (the trifilar). If that is not wound properly then the Rx will not work at all. -mike/w1mt <dj0cu@...> wrote:

OK Folks, So, today I reverted to 1.06 Firmware on the QMX and can confirm FT8CN works perfectly with that firmware but fails to work properly (as described in my original thread) with later

Paul, QMX has no spike voltage issue at end of transmission because of the built-in wave shaping system. Regarding Zeners for QDX, they may provide some protection against the hi-Z SWR case, but

Yesterday I have successfully energized the QMX for the first time. As recommended, voltage to 7 volts, current to 250 milliamps. So far everything is fine. Today I wanted to send for the first time.

I'm going to order the basic 5351 synthesiser board, I have 3 mcu chips here, tried all but no change so I'll change the 5351 as they are cheap. In the meantime I'll play with sdrconnect for wspr

Hi Don, Yes, I remember your original posts and did try the diode method on a couple of QCX's until the little AGC module was developed. As I said, I'm sure Hans will include AGC limiting in a future

That is indeed a dream come true. Thanks for the pointer. And Barb, I like the idea, but do need the CAT option. But I have it bookmarked for later. -- 73 Lex PH2LB https://www.ph2lb.nl/

Tried that, no change. Below couple of screen shot, maybe they tell you something? I have no idea? Thanks Paul DJ0CU

https://bugs.chromium.org/p/chromium/issues/detail?id=1475888 Probably not a lot of people needing this feature but if you would like to use a QRP Labs product on a chromebook then click the link and

I use NetTime 3.14 from www.timesynctools.com on all my windows machines, no problem. Just install it and forget its there. Seems to work, flawlessly for me, over wired networks, Wi-Fi,networks 3G and

Thanks Dan, Noted, I will fix it in the next firmware version. 73 Hans G0UPL http://qrp-labs.com https://www.buymeacoffee.com/g0upl

Hello Razvan If you use linear 3.3V and 5V power supplies it will work fine, and there is no harm in the 5V coming alive before 3.3V. In order to make the processor complete the boot process you will

I should add - No current draw on initial powerup. Significant current is drawn while pressing left knob. Current goes back to zero after releasing left knob.

Rick, Great to hear about your success. However................ Here is a little more about the USB-C connector. The connector is designed around 8 pins and the shields. The connector is designed to

Booted up the new QMX on my bench power supply, managed to flash firmware, hooked up a dummy load to test TX and forgot to increase current limit on the power supply, so it browned out on TX. Then it

Hi All QRP Labs products use this same VID/PID which is licensed by ST Microelectronics to QRP Labs for exclusive use by QRP Labs amateur radio products using STM32 microcontrollers. I'm very

Hello fellow QRPers, I am enjoying my QMX build, yet I’ve run into a snag on step 12 page 31 (the first specified continuity checks). I am hoping that someone has either seen/rectified a similar

I'd like to get the cdc_acm serial port on the QDX to work on ChomeOS in the Linux (Crostini) container. I'm looking for the Vendor IDs(VID) and Product IDs(PID) for all QRP Labs products so everyone

*SUCCESS* !! I resoldered the encoder switches and I was able to get electrons to flow. About 170 mA at 9 VDC (wired for 12 VDC).? The USB port was still not recognized so I gingerly resoldered it.