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Hello Hans, Thank you very much for the detailed explanation. I found the document very useful. I'll keep exploring until my QMX gets home :-) 73, Gabriel LW2DVL

GPS is more vital when untethered from a PC connected to the internet. The U3S does wspr standalone because of the GPS. If you operate your rig somewhere remote without any connection to the web nor

I have proven that it is possible to fry IC402 with too much RF on the input side. :( Did you have an antenna connected to your QMX while you were transmitting with another radio ? 73, Steve, N2IC

How are you powering it? I had an issue similar to this when the buck-boost converter that I was using to limit input voltage was silently clipping the input current (due to a bad setting on my

Seconded. 73 -- Matt N3AR [email protected]> wrote:

Just a quick update regarding my issue with the LCD: I ended up sending the rig to *Jeff Moore, W1NC* , for further inspection. He did an AMAZING job of troubleshooting and fixing the LCD data

"why one would need to have audio on in Digi modes?" I disagree, though I agree that /some/ would not! My ear can't decode the signals, but I can hear how everything is going. Agree, that it's

I find it useful if I am trying to debug another radio setup (listening to the signal coming from the other radio).? Definitely prefer that audio remain available for listening in digi modes.

I have 2 factory built QMX's, a Hi & a Low Band. They are used for DATA comms only. Recently the Low Band radio has been acting strangely. When it begins to TX it gives a pulse - the TX bar graph goes

WB0ZJJ-Alan via groups.io wrote: [Quoting W1NC e-mail:] For those of us who have early QMX units with Rev 1 or Rev 2 circuit boards, is it wise to modify the board to install the protection diode

Hi Ludwig, I think the time sync has to be done correct and not just at the about right maner. Bseides one can observe the spectrum to get the information about the start. For the use of the wide band

Thanks for putting that on Hans! Learned a few things from your slide show as well as some insider info I didn't know. If you are a QRP Labs fan (as most here are) this is a must watch if you aske

I managed to build my QMX successfully, and in two days of playing with it fried the receive function.? W1NC Jeff Moore diagnosed and returned the radio to full function:

If I don't have a proof of time sync listen to the audio and watch the computer clock gives me a first impression of sync. And in the moment Digi is the only way to listen to SSB I think. 73,

... what I want to say is that the audio volume of one Continuous Wave signal in BW of 300 Hz is about equal to the SSB signal in the 3kHz BW. Considering the characteristics of a SSB signal. But you

Yes, that is the way to do it. These display's backlight is really bright. I have even used greater resistor there. -- 73 Bojan S53DZ

Hi Hans, thanks for this FW release. A thought: I wonder why one would need to have audio on in Digi modes? Just mute it. And enable the audio in the third (not yet there) mode to have the choice of

Good stuff, Randy! Those toroids really are self shielding! -- 73, Dan? NM3A

GA Bill, I have used various WSPR units for 7 or more years without having a GPS until my U4B came. It’s such a joy to turn it on and walk away, the time, grid and so far load automatically and

Maybe you can replace R306 (33 ohm) on the front panel board with a small 100 ohm pot to adjust the brightness. I was thinking of doing it for my QMX (not plus) not necessarily for the brightness but