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Andreas, sometimes ago I had similar effects. For me after a Factory reset the sweeps were ok and after a while working with the QMX I had strange results again but no bad effects on the receiving. No

And now I am back to the bad results again: Again, no changes. Just ran a few sweeps (Audio filter, RF filter, etc.) then back to the Image sweep. So what we see in these sweeps can't really be taken

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Thank you! re: I will double check this tonight & report back. Regards! ~Gordon Sent with Proton Mail secure email.

I also just noticed that the results are not always reproducible. I just did an image sweep on 60m and now it looks OK: I didn't make any changes. I just cycled through the different bands a few

Hi Ludwig, thanks for the reply! Results for 40m are excellent: 73, Andreas

Thanks for the reply Hans. I have posted on another thread that I have it sorted. I did as you mentioned, and moved the turns on the LPF toroids,that improved it by about 3dB. I then removed one turn

This was my finding also.? I started with a qcx, then a qcx mini. Then a qdx followed by another qcx mini and finally the qmx with another on the way. I had two issues that were nothing to do with

Dear Robbie, I was building a QMX+ and I had the same indications on my power supplies. I think I have an intermittent short on my board but can't seem to find it ... Eventually the little transistors

My new favorite tool for doing this is one of the ~6mm bamboo skewers, the end opposite the conical point being carved into a blunt screwdriver shape, like the old orangewood "spudgers". The cone end

Briskly reading through the group one might think every build is fraught with problems. Not so. My kit build was intentionally slow and cautious, and I've kept an eye on this group, learning many

I just daisy chained 6 1N400 diodes together to drop the open circuit voltage down to 11.75 volts. Most likely this was a huge mistake as the loaded circuit voltage is probably a lot less than 11.75

Not yet. I thought about that last night and will take that measurement today. For additional testing, I hooked up a constant voltage power supply to my QMX+ last night to get some measurements. When

Seems the only option for the 60M slot is 80M, and I would question what you could practically do on 80 with QRP.? No doubt someone has worked DXCC or some similar amazing feat on 80M QRP but in my

M0WAS, Here is a photo of the toroids. The number of turns on each is by the instructions, and they are spaced fairly evenly on all. I haven't tried to optimize anything yet and not sure if I

I will. -- Allison ------------------ Post online only, direct email will go to a bit bucket.

I meant to say that I removed and replaced Q103 with a spare D403 device. Sorry for the confusion. 72, Randy NR5N

Hi remind me never to talk to you again!

Gordon, please follow the description in the Wiki document. Regarding the second point voltage at "+12V" should come up after PWR_ON goes down. Without this voltage nothing will work. Did you solder

G'Day Chris - I will have a fiddle with the Rise & Fall Thresholds. BUT as I mentioned before, these are Factory Assembled QMX's & QRZ tells me I have successfully worked 210 QSO's through 42

Toru, don't worry about your T507.