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I killed my QDX running off of a fully charged lifepo4. Reached out to Jeff and now I have a working QDX again. Awesome work Jeff. thanks -- 73s, AA6ST Sameer

Bruce, the topic is using PD power banks. Not wall chargers. I've been doing it for years myself. I even wrote an article for QRP Quarterly on the subject back in mid 2020. Wall chargers are indeed

I had a similar temperature-related issue with my QMX.? It would have loud 'digital' noise for several seconds, then be perfect.? And I took it out on a POTA activation, and the noise lasted longer

Surprisingly enough, Ikea makes some decent cables.

Those 1956 eyeballs still have lotsa miles left in them. But after 11PM they seem to go a bit haywire. -- Jim VE4BWG

Essager is good brand with good quality for the price. Combine it with usb isolator modul and you are safe.

No RFI problems both in or out at my shack at current setup. Power is low enough, all ground loops eliminated, usb isolated, single point grounding, coax cables cut to lenght to avoid any accidental

Having the same issue. Got it working for several days straight. Then turned it on a few days later and it can't find the microphone again!

Some more on the QMX mid band high noise. First let me describe the issue. Turn on the QMX. Very loud static/noise. After about 10 seconds, the noise becomes intermittent, and then goes away

Many thanks Chris, i'll try to acquire a regulated power supply during the Holidays and get back to you in January. Sly VA2YZX

They are not intentionally crossed; it is best practice to avoid crossing the wires on the windings. However as you note, it will not have a noticeable effect on the functionality.? When orienting

I would use a pre-made buck-boost converter, like this one I got from amazon: https://www.amazon.com/WWZMDiB-Automatic-Converter-1-25-35V-Adjustable/dp/B0CCHPPKW4 or just search for buck boost

I bought some great cables from? Fannoday on Amazon.com recently. They are very good quality, high speed shielded cables at a reasonable price. -- 73, Dan - W2DLC

No problem Brent, glad to help, we’ve all been there, you’ve only got a few years on me. 1961 vintage myself. Cheers Nick G0OQK

Hello all, When I go portable, I use a 12V Makita drill battery which voltage varies between 12 and 10.5V. It is really convenient, the circuitry protects against shorts, it is in a robust case and

Looks really interesting. Have you got more photos to show? 73 de Yannig - F4IUJ

wrote: Dear Chris, Allow me to be a little bit confused by your statement. Are you referring to drain current or maximum power dissipation @ 25°C? What does the frequency have to do with the

Hi I am looking at the WTS transformer instructions, and notice that the wires on the non-tapped side of the primary seem to be crossed. Is this intentional or a trick of the light. I don’t think

Folks, I cannot tell you how fantastic it is to see so much help offered here with this group. I am fully up and running now and everything seems to be just fine. Anecdotally, I have a UNIX working

Until Hans fixes it through programming a lower PA voltage for 160m and 80m I would recommend against operating or not operating above 10v supply since the PA transistors are actually operating above