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A 4S LiPo is 16.8V at full charge!? ?You need a bunch of diodes as even after near 80% discharge it will be 12.8!!! If LFE then14.2 at full charge. 8 NiMh might be a better fit for Q-X radios.?

I don’t have a QMX+ yet but what I intend to do is build it for 9V and install a linear voltage regulator so that I can supply it from 12V, 13.8V power supplies, 12V lead-acid batteries (could be

I built all of my Q*X radios for 12v. My thought was that if I built it for 12 and only had a 9v battery I would be ok, but if I built it for 9 and only had a 12v battery I would be out of luck (or

I'm not sure about the 0.8 V for "no key" aka "idle" but for "T" it looks like a short between gate and source of Q507. (Did you check the solder joints of Q507?) If no external short between G and S

For your item #2, you can adjust the displayed frequency using several methods including those in the thread below. Reverse beacon spots have perfectly matched my display since I adjusted my 20m

Here is the result: -- I am cheap! Only used one! Need a smaller one for QMX... 73 Karl KI4ZUQ

I sanded a couple of these BS170s a while back to show what they look like inside and posted pictures here but it looks like the pictures have been deleted. (I think that happens automatically after

FWIW, I don’t own the W2LI loop but I am a long-time Alex Loop user. You’ll find that with practice that it becomes pretty easy to get to within about 2:1 SWR by resonating the loop for maximum

The receive current draw will be different depending on what voltage you built it to run on, and what voltage the QMX is being fed while your doing your initial testing. For a 12V QMX running on 12

Okay, thanks everyone. There have been some really good suggestions here. I think I've figured out what to search for, and what size.? When it's all figured out and working, I'll post some pictures

https://dl6nbs.lima-city.de/htm/arduino ERROR 404 Not Found but this one https://dl6nbs.lima-city.de works and I can choose Arduino cw-decoder in the left side menu. 73 - Pierre - FK8IH

Yessir, Andy suggested some 2mm banana connectors. I will be doing some searching for those as they certainly seem viable.? Thanks. Have a great weekend.

I understand and that is what I am using now. But I would like to be able to leave the little Z-match tuner out of the setup sometimes. Extra coax, extra loss for an already tiny signal. I mean, it

I do like Anderson PowerPole connectors. But so far I haven't found any that go down to 26 awg.? But I'll keep looking. Thanks!

Thanks Andy. These do look like a good choice. I'll do some searching. Have an awesome weekend. 73

Just a thought: Best of both worlds:? Wind two T501s, one for 9v and one for 12v and arrange plug/socket to allow interchange. Lots of room in a QMX+ to do this.

Bpf results are visible in pdf attached

What mine looks like

I had the same questions when I did my rev 1 board a few weeks ago. I did have a post about it as well comparing the two setups. in my digging I read Hans reduced the count of turns when the 20m

It's a question which is heavily driven by your power source preferences. If you're flexible on power sources, the 9V gives a bit higher efficiency and probably gives a little less stress on some of