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So All, Here's the final resolution to this problem. An older Arduino Uno. None of the tutorials talk about this fact, but right there in the code (remember RTFM? well there's also RTF...gCode!!)

Hi John - I bought a cheap UCTRONICS <https://www.amazon.com/gp/product/B0861LGM15/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1> 6-36 volt 5A adjustable buck boost from Amazon for $25. It has

Ready to start my QMX high band kit build. The assembly manual recommends using a current-limited power supply for the first power-up. What are members using for this. Lowest cost if

Let's try again: If a Rev2, the symptoms are typical of an IC402 failure.? This can be verified by measuring the bias voltage on pin 9 of IC402.? It should be close to 2.5 volts. If it is a Rev1

There is an error in the above:? Since L401 is connected to all 4 of the IC402 pins 3, 4, 5, and 6, all will be at 2.5 volts.? It is the capacitors (pins 10, 11, 12, and 13 that have either 2.5

Thanks for the kind and nice comments gentlemen. ?I appreciate it. ?Fixing these rigs is like solving a puzzle. ?I guess that’s why it’s fun for me. ?Plus, these are some of most innovative

Please see this My description of trouble shooting:??/g/QRPLabs/message/116597?p=%2C%2C%2C20%2C0%2C0%2C0%3A%3ACreated%2C%2C%2C20%2C2%2C40%2C103670926

With ongoing instances of enameled wire soldering issues being reported, I wonder whether it might be prudent for Hans to begin recommending physical removal in his instructions instead of the burning

?????? I can also report stellar service from Jeff on my QMX. Jeff provided sufficient context about his findings and fixes—thereby enabling me to learn new things in the process.

If you are not talking about the one with a knob then I don't know. Sorry, Sandy

Hi Sandy. The QCX has an encoder. Is this the same one that QMX uses? 73, Juan Lu9CYV

Another cheer for Jeff. A 5V fault took out most of the receive section of my QMX. He found and replaced every blown IC and fixed a few bad solder joints that I didn't catch. The community is lucky to

The minimum version for Rev 2 is posted among the downloads. IIRC, 007 would be ill-advised for Rev 2... Paul -- AI7JR -- Paul -- AI7JR

SPOT ON! It must be this... I discovered they actually sell BSS123 in Prague (one and only shop, but TG it sill exists). However, I was too fast and replaced the faulty 2N7002 by another 2N7002. It

Bob, This seems to be an uncommon issue. I have learned over the years in I.T. work that if I'm the only one with a particular problem, it's probably me. Double-check every solder joint. Perhaps you

Hi George - The PA transformer manual <https://qrp-labs.com/images/qmx/manuals/transformer1_00b.pdf> link is also just above the Japanese translation of the construction manual. Sandy KB3EOF

It's on the item pages in the PA Transformer manual: https://www.qrp-labs.com/images/qmx/manuals/transformer1_00b.pdf -Nate N8BTR

Can you you post a link to the docs with the RWTS method? Thanks George VY1GP

Hi folks, I don't want to nag, but I'm just completely stranded and would highly appreciate some hint, as where to take things up from here. I simply just got no clue what do do now or try next at

Eduardo I had problems with T507 also and can offer 1.? If you attempted to burn off enamel on the thicker wire ( the primaries ) you probably failed to make a good connection. Those wires require