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Stan, RR--I'm not going to cut the center pin from MY main board! I'm quite happy with my power cord inline Drok adjustable regulator solution to these problems. With the correct settings on the V and

Another solution that we could consider is to put a suitable diode on the companion board, feeding into the + terminal of the BMS.? The other end of that diode gets hooked (using an 18 guage or so

While building and debugging my QMX (1_00_027 firmware) I had a confusing moment when I put the transceiver into Practice mode, forgot about it, and then tried to use the SWR Measurement function.?

Sorry that I forgot to take the photo last time, Sardar. I'll do it next time! 73, Cal (AD8Q)

On Mon, Nov 18, 2024 at 07:02 AM, <me@...> wrote: After burning my short 0.5mm trace with too much current from the high charge voltage I was using, I replaced the trace with a 28 AWG wire and

First I messed up my antenna is: MFJ-1982LP, END FED, 1/2 WAVE, 80-10M, 30W WIRE ANTENNA Not MFJ-1984LP. The coil has 6 turns. Thanks, AC4OW, Sam Thanks, Sam Hanie samhanie@... 623-219-8130

The 3:2 transformer has two symmetrical windings. One, the primary has 3 turns, the other 2 turns.

With LM386 instability (which I have run into over the years), the series RC has to be matched to the speaker of interest. Some standard values such as 10 ohms and 0.05uF as indicated in the data

You are correct in your statements regarding the photos.? It is symmetrical. The 3:2 comes in the following steps, when you cut the twisted loop (becomes the two ends of the primary), and re-twist

Hi Sardar, please don't get my above comment wrong. I fully agree with you, it's a low cost, low effort solution, which can work for most cases. I just wanted to mention that this is not a "consumer

Transformers from old wall power bricks have good wire in them a lot of times. -- 73, Dan - W2DLC

Great save.? You have nice tight winds on that transformer.Perhaps a bit more than the recommended 3 per centimeter being enough.? I too snapped a wire on that assembly on my first QMX build. I did

It's symmetrical.

On my homebrew shortened EFHW, I built a coil following step 10 of the instructions from K6ARK " QRP/20w 49:1 EFHW Instructions" : https://k6ark.com/qrp-491-efhw-build-instructions/ 73 de Todd W2TEF

With 12.5V supply the current is about 1.2 A, with empty batteries this would be higher. Dirk, Thanks, yes, I agree with yo

Thanks Hans, My 220k is in parallel to R113 and it looks as if I'm lucky with the tolerances on the 3.3V supply.? I wasn't sure if there were low PWM limits as well.? Now all that's needed is put

I also have a problem with bad image rejection. I/Q signal sweep shows anequal amplitude of I and Q signals. I first checked and rewound the trifilar transformer T401, but without results. Today I

The batteries are now charging in the QMX+. With 12.5V supply the current is about 1.2 A, with empty batteries this would be higher. Another potential issue: The battery voltage is directly applied to

I don't understand if steps 11 and 12 are producing a "symmetrical" result. I m winding and everything is fine until step 10 included. Figure on step 11 seems to be as step 11 is already executed and

Hi Aki, Thank you for the reply. I will review my capacitor selection. 73 de Jared N7MAW