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Odd. My Pi-400 using PiOS 64bit reboots fine with the QDX attached and on. I have the OS on a USB SSD drive so maybe that makes a difference? 73, Cliff, AE5ZA

Luc, Nice Z-Match, they really are quite simple, which is their appeal - sadly, I dont seem to have much time to build stuff these Days - but there are always exceptions! (but thanks for the

CQX+ shipped November 2022- revised instructions state a 820 Ohm resistor instead of a 1.2K Ohm resistor for R42.? Myt kit contained a 1,2 K but no 820.? Should I install my own 820?

Muhsin, Thanks for the information - I had an ATU-100 and returned it - 'not reliable' for QRP! I do have an Elecraft TI which does work with QRP (of course - its Elecraft, why would it not!) (I also

Hey Jeff! Is your rpi set up to boot from USB? Andrey

While rebooting a Raspberry Pi 4B with a QDX Rev 3a attached the reboot stalls at a blank screen after the OS shuts down. The RPi will remain in this state until either the power is removed from the

hi you can built yourself (atu15, atu10 are the same) https://github.com/Dfinitski/ATU-10-10W-QRP-antenna-tuner 73 muhsin TA1MHS

Hi strongly recommend this same size with QDX auto vs vs https://www.aliexpress.com/item/1005004782483588.html 73 muhsin TA1MHS

Mushin, why not use Hans' kits? They aren't from aliexpress and have full functionality.

hi might help Aliexpress (much more expensive then the 50 Watt Amp :( ) I don't reccommend... https://www.aliexpress.com/item/4001297662776.html https://www.aliexpress.com/item/1005001786896520.html

That's sound advice, particularly for novice QRP'ers like me! -- Mitch, AB4MW

Bob, Hans posted this a while back and it works. I've done it myself.

I love the FlexCut style handles like that first one in the pic.? They really reduce fatigue when carving.

Here is a link to Ron Hock’s blades: https://www.hocktools.com/products/knives.html -- Colin - K6JTH http://tangokeys.com

I have used scalpels for a long time. I find the plastic handles are best for long use. I used them for hours a day when I was carving Lute Rosettes. For general bench use I like violin makers knives.

Looking at the QDX's manual voltage vs watts plot, my 9V QDX should be outputting almost 5W on 20m, but it is only?outputting 3.3W.? Are there any optimizations I should attempt? I'm using a 9V @

They have their place but for delicate work my preference is a surgical scalpel handle and one of the many plade shapes available.? I find #15 to be good for cutting traces, just press down and rock

Exactly, Hans.? The feature set is to the point that function is great, the big bugs seem to be handled, and now we are looking at form.? The next big step for QRP-Labs seems to be a linear device

While you have the BS170s out, consider installing sockets. Cut three pins off of a machine-pin DIP socket with a Dremel tool or a teeny tiny modeling saw. For the 3 and 3A boards, you have to spread

Hi, Charles. I do not have any issues with the amp or exposed LPFs messing with uC I have nearby.? There's more RF running around when I hit 1kW on my vertical than with 50W from the QDX and