So far the initial tests on the QMX seem to be working fine. Just transmitted into a dummy load on all bands and everything seems fine. Will test more when I get it home later this evening, I was a li

Just curious if anyone who ordered a QMX online has had it shipped? My order shows complete on May 20th but not shipped yet. I am NOT complaining at all, just curious! 73, Bill NZ0T

I just finished my QDX from a kit and I plan to order an assembled QMX (I'm quite old with old eyes and found it was not a very easy task compared to what I could do 50 or 60 years ago with vacuum tub

Sorry but I want to ask the dumb question - is 12 volts the actual ceiling for QMX power supply or is it rather the old "12 volts but it's really 13.8 - 14.0 volts" thing? It's easy enough to reduce m

Hi, finally got a chance to test my HighBand QDX on TX today and started very positive, 20m worked perfectly, have built it for 12v but started carefully with 9 volts so as not to destroy anything :-)

Yes, another QDX smoked thread. Sorry about that! I've done some list searching and reviewed https://qrp-labs.com/qdx/qdxtrouble.html , but I hope to get some advice directly. I have a new factory-bui

I've built two QRP Labs 50 W PAs for 40 and 20 and they work perfectly--just as advertised. I purchased an additional one, thinking 30 meters. But with 10 meters wide open I'm wondering if it's feasib

Any idea why I get a key down sound with the dummy load but not when connected to an antenna? I then just get a buzzing sound.

I have a fully built and working QDX including case surplus to requirements for €115. It's built for 9 volts, and the power supply if required will add another €10 to the total. Shipping price will de

Hi all To get the ball rolling on QMX, I have uploaded an initial alpha firmware file to the QRP Labs QMX page http://qrp-labs.com/qmx I have also uploaded an edited version of the manual which contai

I have continuity between pins 6 & 9 and then there is continuity between pins 3, 4, & 5, but not between those two groups. Can you tell me which inductor tap would be between pins 5 & 6? I'm assuming

Started assembling my QMX kit from the Hamvention. Going through the parts list under Semiconductors, right below the 1N4007 diodes (x6) is a listing for "unused diodes"--two of them--which are listed

Hello there - I bought my QCX+ 20m back in May 2022 at Dayton and am just now getting around to assembling it. I see on the documentation that for kits produced after July 2022, there should be 1 LM45

Trying to find QDX firmware page. Says it is in Files section of groups.io, but I can't find it. -- 73, Dan NM3A

Finishing the build of this 30m amp and when attaching the front plate it did not fit.... Then i noticed it reads "QDX Digital Transceiver" For now i am going to use that plate, i drilled another hole

Re: assembly_1_00d.pdf manual corrections needed: Pg. 4 - Word should be "battery" Pg. 56 - Picture #4 is a QCX-mini Pg. 58 - Picture # 16 is a QCX-mini es vy 73 de "baab" w9ya (serial # 100...hi hi)

I've been told that there are no stupid questions and hope that is true here. I've started construction and finished the capacitors, diodes, and inductors in sections 2.5, 2.6, and 2.7. By now I have

Hans, I have my QMX built. When I apply power and press the volume button I hear a little click in the headphones and no backlight or display. Is this normal for no firmware? I hook up a usb cable to

Just wondering on when we should expect the firmware to be available for the QMX? Thanks!

Hi all, I have a low band QDX which is working well. In Hans’ presentation to FDIM he says “SSB reception is no issue,and QDX does that already…” I assume this means that, using suitable software it i