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both of us taken together: we are 10 years old dear friend! So let us hold hands ;-) Somewhere in this posting group with such a weird search function, there is a splendid thread that might be of use

A useful start is to work out what you did as that will predict the problem/damage Was the 12v power supply 12.0 V. ?Or 13.6V ?

What is worth adding is that while static damage can be immediate it is more often seen in months or years after the accidental infliction. Early CMOS semiconductors could be killed seemingly by just

Marek, BPF plot will also look bad if you are on VFO B. Make sure it's on VFO A.

That is a great GoBox for your QMX! Hope you can get out and enjoy it soon. -- 73, Dan? NM3A

The volume problem is known and on Hans' list to correct in software. -- Colin - K6JTH http://tangokeys.com

P.S. there also may be a solder short between the upper right corner second and third pins down

BPF filter plots look crazy without a 50 ohm dummy load. A tuned antenna won't work since it is only 50 ohm at one frequency.

This happened to me too, with a brand new, pre-assembled QDX. I got it all configured correctly in WSJT-X settings – tested the CAT there and it worked fine. Tuned to 40m FT8, it received and

Steven, that picture is actually of my handiwork on my QMX lol.? It works fine.? The other picture of Ian's? I'm thinking maybe 5V from the computer is shorting out on the board. 5V USB isn't used

All of the mentioned precautions are effective, having used most in my 20+ yrs on the company work bench. At home, I'll use a grounding strap if I'm working with something known to be uber sensitive,

Hi All. My QMX shows unusual behaviour when turning left encoder to turn volume up or down. It seems that first "click" is opposite what I am trying to do. So, when I try to turn volume up in the

The lower and upper outer pins look like they could use soldered touchup. I added sharpening to the photo (unsharp mask) and you can see it a little better. I would touch up those 4 connections with

Thanks Rick, Understood. Checked the 5V at the QMX from the Laptop and its there. The only Pad which is dull in appearance is the one with the Pad missing and as I say that pin isn't used. There

I use a Joplin Amateur Radio Club launcher. Just add a Zebco 404 fishing reel and a bicycle pump. Works great and very handy when operating portable from parks or at field day. It will launch all

I though about what one of the lead(or bismuth) solid metal sinkers would do to my head if it fell on it, and went out and bought a couple of arborists' throw bags, which are leather with shot inside,

Hi all. I have my 20 meter QCX Mini up for sale. Has TXCO and AGC boards installed. The AGC board may need adjustment. Puts out a bit under 3 watts. I was unsuccessful in increasing the power

For many years I have used poisonous lead fishing weights for lobbing antenna cords over tree branches and prominent rocks. That's changed. I now use an oval-shaped 100 g ECOFT<https://ecoft.info/>

Suspect L9 but really need to know DC levels on diode cathodes when in receive 20m. They change with band switch but not with TR switch. If correctly near 0 on D3 and D6 cathodes then L9 47uH may have

Paul, that's correct, the QMX is not powered by USB. Regardless, there will be 5V coming from the computer to the VCC pins on the USB-C pads on the board.Those VCC pads on the board should not be