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Hi Jim Please check *Firmware version history* from https://www.qrp-labs.com/qmx.html you have to check yourself 73 DE muhsin TA1MHS

Hi, I have the QMX+ connected to the RF input of PA and the PA RF output is connected to dummy load. QMX+ & PA is powered up. When QMX+ goes into transmit severe oscillations occur at junction of

James, there are more than one possible reason for the shown values (e.g. T507, LPF section, cables, dummy load). It would be helpful to have some additional values. Could you show for each band: for

Thank you for the verification, Hans. I will look forward to the calibration function when time allows. 73 Trevor G6PSZ

Hi Michael, that’s great that it is alive. ?Congratulations on that part. look at all of your soldered joints under magnification and a bright light. ?Look especially at T501, the output

Hi Don, mni tnx for your answer. Yes I also think the driver SN74ACT08D is under suspicion and I will replace it 73, Guido HB9BQB

Hi Greg, mni tnx for you answer. Yes I also think the driver SN74ACT08D is under suspicion and I will replace it 73, Guido HB9BQB

mine is close, 2,5w on 20m; 1,8w on 17m; My SWR is higher 73 Luis CU2IJ

Yes, the only exeption I remember are the single turn coils in the T507. Eveything else seams to be in .33mm wire. > > > Good luck, Luis CU2IJ

Yes, I just rechecked my dummy load to be sur and, it measures 50.1 Ohms.

Looks that way but if you look at the screenshots, you can see I'm using a 9V supply.

Hi Stan, thanks for your comment. I do have a newer revision with D516 already installed as SMD. KR Dirk

Hello James I have some ideas I wanted to try but I consider them "stretch goals" and so so far out that I don't want to put them on paper (or electronic equivalent) until I am way past much higher

Hello Trevor Marginally low PA voltage is not considered a problem. It's acceptable. There's device to device variation. In the future I will include in the firmware a calibration function that can

Hi Ian, all According to my records for the last 6 months, there has not been a significant slow-down. Remember September isn't over yet. September production was certainly lower than

Number sent. i think your build looks great. From what i saw yesterday i figure you’ll be able to tweak better results than me. Your Bpf should also be squeezable. If you look at mine the windings

The high-band powers look like you wound the transformer for 9V but are running with 12V. [email protected]> wrote:

First, the good news: IT'S ALIVE. It accepts power, it does not catch fire, and all the controls work and pass diagnostics. The bad news: it does not pass transmit diagnostics, and all the different

Hi Ludwig, I have some output numbers for you. 60M-<.5W 40M-<.5W 30M-<.2W 20M-9.9W 17M-8.4W 15M-5.5W Do you have an idea why there's very little output om 60M-30M and too much on 20M & 17M? Also

did you have a good dummy load attached when you pressed T to turn on transmit? The SWR of 2.8 is much higher than it should be. With a 50ohm dummy load it should be 1.1 or so. [email protected]>