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Hi, I bought a QMX kit and I'm missing one 30pF (C401) 2.54mm capacitor - maybe someone has one for sale? Krzysztof

This is my first post. I am a noobie here. I live near the OP and am watching his QMX+ build as I am considering getting one for myself. With respect to K3TCT’s observation, I was wondering if

I completed a QMX+ last week and the output powers are very similar to yours as you can see below. Measured power is from an external power meter and reported power is from the diagnostic menu on the

Hello Dick Then I suppose Icom and others must not be properly switched OFF even when they seem they are. It's just sleeping but the USB port still active. QMX on the other hand is properly switched

Hi Ian Thanks :-) Nice project, congratulations!

Hi Hans That's great to hear, thank you! — Rich Atkinson 73 Rich VK2LTC

Hi All I’m following with interest the discussions on EER. I’ve just posted on QRPTech my project that uses this technique for SSB. It works but not very well. I’m hoping the wonderful people

Hi Rich All future kits will be supplied, once current kit batches are exhausted, with only #28 wire (0.33mm). This is because I tested very carefully including power output, efficiency, harmonic

Hello, I was very proud of my 3:3 weird twisted sister when I made it yesterday. Today I realised I used the #28 wire and I should have used the #22 wire. Will I need to desolder and remake it, or

Steve, I've had similar issues with the encoders on my QMX. My solution was to fit a couple of small capacitors to de-bounce the contacts and that has completely resolved the problem (until the

It is amazing that the "Envelope Elimination and Restoration method" was there alreay in the 1950s despite limitations in means for implemention. I wrote up a little overview of the methods, called

My 1300 session was great fun, I got a real pile-up on 30m, and also made 2 QSO's on 17m 10 QSO's in total with 4 QCX/QMX worked. 1900 session was not so succesful, 1 QSO on 30m and 3 on 60m, and only

Hi Hans, Researching and filing a patent is a very expensive proposition for a company. When I was working, the typical cost of patent searches, attorneys, and filing fees was in excess of $10,000 so

Hi Tony That's good to know, and well deserved. Glad to hear Motorola have good policies. Around 15 years' back I was a critical part of the world's largest commodity derivatives transaction which

Hans, you’re correct. Motorola benefited from our patent filings but as employees, there were a few tiers of monetary awards. The first tier bonus was awarded if Motorola decided to file a patent.

Ok, rewound it using the "WTST for 9V transceivers (“Weird Twisted Sisters Transformer”)" And then I realized I am kind of slow.? I was thinking my oscilloscope was showing 40v peak, not 40v

I think that the "problem" has been resolved. I have added a jumper from the encoder GND side to a known GND (see pg 48 of the manual + photo). All has been stable since. Thanks to Joe, VE7BFK, for

I was one that dismissed and still do the uSDX not that it could not work but it was very clear after working with it the classic issue of not enough CPU or bits to do it well.? Getting a ATMEGA328

Additionally, performing the analysis posted by Jeff Moore,W1NC, I see in phase signals on pin 1 of IC406 and pin 1 of IC405 ( not 90 degrees out of phase)

Performing the ADC test the results didn’t look anyway near the graph in the manual. After doing more scope probing I discovered there isn’t a CLK0 on pin 2 of IC403; but there is CLK2 on pin 14.