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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.

Andreas, I think it looks poor because of the very very low signal level of -80 dB(m). For 60 m and 40 m BPF3 is in use. How are the results for 40 m? If also such a low level the path between L401b

Thanks, Hans! And when you are at it, maybe it's also worth to execute GPS time synchronization as soon as a time is being received (if there was not any fix before). It's sometimes hard to get a

Those are great power outputs. How are your toroids looking, all very tight and even, all with turns according to the manual? Would be great if you could take a pic. I'm currently trying to improve my

Thanks Andreas Noted. I will fix it... 73 Hans G0UPL http://qrp-labs.com https://buymeacoffee.com/g0upl [email protected]> wrote:

On the thoughts on upgrading my license,? I had a stroke and find talking very difficult. I taught myself cw so I can still get on the air without having to use ssb.? I find reading very difficult

Hi, while monitoring the WSPR signal from my QMX to figure out why I didn't get spotted at all, I found out that the QMX was not sending on the right point of time but shifted by several dozens of

Have you enabled Japanese limits in System config? If you enable Japanese limits, an abnormally large current will flow when transmitting on the 17m or 15m bands, damaging the BS170. syuji ota ?