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I noticed yesterday evening on my QCX mini. 73 Adrian yo3hjv

Glen, Bob, I have a similar setup with a 7809 (1.5A) bolted to the upper case. It dissipates some heat, but not excessively so. Biggest heat comes from the QDX - finals or transformer - so I put a fan

Dan, I think the failure scenario went something like this: On power-up, after handoff from the 3.3 v linear regulator to the buck converter, a disturbance on the power input, or a rapid continuing

Agreed, John. Original part is also a 6.3 V tantalum, so replacing it would be an identical swap. Whether that was the original failure or not, I think it's failure fried more than the obvious parts

Hi Hans, How about the All band (HF 80m-10m) QMX transceiver? In a bigger housing, extended band switching, a separate GPS input maybe or even a GPS plug-in... Quite a challenge... 73 Bojan S53DZ

I would be a subscriber of the QMX “midkit”! ? 73 Hans Merz / Pa3AAW

Hello Simon There is no AGC yet. And the S-meter is not related to the AGC in this case. The S-meter was just implemented based on QCX and is not correct for QMX, so I have disabled it temporarily;

Hi Manuel, That I understood. My question was more about whether the not yet activated AGC/S-meter could have something to do with it. I also wanted to point out that CW operation (for me) is not

Hi Scott 1) We will provide a conversion kit, the same way we have for the QDX see http://shop.qrp-labs.com/SPAREPARTS/qdxhi 2) The changes compared to the existing 80-20m QMX kit are just

Hi,? Quick question for Hans.? Looking in crystal ball, will a future high bands QMX likely be just a conversion kit for the current low bands model, or a major overhaul of low bands kit?? Also, do

If one winding is wound different to what the designer intended, then the "forward" and "reverse" sensing of the reflectometer will be reversed.? Hans could provide a configuration parameter to cope

My concern, Dan, is that replacing the cap with a sturdier cap without understanding and correcting why it failed in the first place may just move the next failure to another, and costlier, place. As

I have the same setup with my qdx. The 7809 is inside the qdx stock enclosure. The 7809 tab is bolted to the qdx case for a heat sink. 73 Glenn VE9GJ

I was wrong, but now: I see! it was not a *qst* idea, but one from CQ Magazine: CQ March 2015 QRP Special Page 18: Behold Rockmitey , de ED Cobb *K4YF* R es Ray Kauffman *AJ4YN*. A memorable piece

John, Maybe I should drag my feet. Hard to do. We'll see. Next step is checking for resistance of 3.3 V bus. Waiting on micro clips to test things out. -- 73, Dan? NM3A

I?m not Hans, but I asked him in private about AGC: AGC is not yet implemented. Neither is SWR Meter. I?ll quote Hans directly: "Firmware is getting there, bit by bit" 73 Manuel; DL2MAN

The Lab Power Supply was a very early investment in the uSDX / (tr)uSDX development path, and it paid for itself multiple times..... If you?re a maker, you need one. Can?t put enough emphasis on

Hi Dan, I?m not 100% sure, what was the cause in my case, so I can only guess. But I would look at the real obvious stuff: - I?ve shortened some of the display wires and gave them another touch

Maybe you should drag your feet a little bit on this repair until more is understood about root cause and corrective action. JZ

Dan, that may be a little too close for comfort. Ten volt 220uF tantalums are available in the same package size. Stack two? Put one on the PS board, one somewhere else on the 5V