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Thannks Ryuji! Youg got me right. This is what I wanted to know. 73 de dl2arl

Thank you for the response Jerry. I followed the advice and desoldered one lead of L14. However, even after doing so, when I power up the QDX, it still doesn't turn on :(

That's good news. Auto tuners are not a good idea with QRP rigs like the QMX, QDX etc. The tuning process goes through a number of trial settings that will give very high SWR values and may damage

QMX update. I removed one turn from L510 and 513, 30m power improved but 20m no change. New version of T501 built and certainly helped except 20m. New version L401 built and a huge improvement, all

I'm not sure if that was the case with earlier firmware but mine does have that option in QMX.

Thanks for all the tips. I spent a good part of the day today just inspecting my work, trying to make sure I had to cold solder joints again...I managed to get another 0.5 watts out so now it's up to

I found an equivalent part from a parts radio I have and dropped it in. Unfortrunately, no change.

This didn't work, unfortunately. I took my 2.5 Watts down to 1.0 watt. Spreading them apart again restored the power

I don't see that as an option the QMX...it only has a GPS viewer option under Hardware tests.

Thanks Tony, looking forward to reading your report. Tony AC9QY

I have attached a PDF of some work I did over the past few days regarding core loss modeling for my QDX. The result data actually covers 80-10 meters but I was looking at my high band unit when doing

You can add my first QMX kit to the list of blown MPCs.? I believe that I caused the failure by testing out of the provided enclosure.? Pressing the encoders and buttons can flex the boards if not

Hi Gregory, There is a 40-watt version. https://www.ebay.com/itm/164853606503 If you already have the 100-watt base, you can look up the N7DDC GitHub or the following

Ya know, blown CPU's seem to be very common on the QMX (mine was blown, too!) Wonder why? Paul -- AI7JR

Good to hear that it's at least technically possible in some way... Yes, was hoping it might be, with "just" a firmware update ( I don't mean to minimize the work involved in creating a new firmware

Hey Cal - Tried to look you up via QRZ to ask you a question about the AT-100M. Here it is: For Function #10 "Calibration" what setting do you use for 20W radios such as the Xeigu G90 or FX-4CR? It's

Ok great. Thanks for the quick answer.

ALL: If I have any question regarding the Zin(fRX - fLO) characteristics, it is more on how we can take advantage of it. If that function is a steep concave, particularly at lower fLO like 3 to 10MHz

I have considered removing them as a last try. I've used them in my QDXs, but there was room to build a much beefier heat sink there. Also, as I've said before, with the number of dying BS170s I've

The USB-C jack may create an issue and there will be no mic hole. Nothin a dremel can't solve. -mike/w1mt