The QMX assembly instructions suggest a "high power" soldering iron - 60W as an example. My Hakko Model 936 has temperature settings on a dial that goes from 200C to 480C. Does anyone know what temper

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

I find that I am unable to install PTT jack X201 due to interference from C525. Has anyone else experienced this? C525 is bent towards the jack due to misplacement of the toroids, but I don't see how

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

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)

Hello. I purchased a QMX to be assembled at Dayton Hamvention. I was not asked what voltage I would like it built for. How do I get this choice to QRP-Labs? I cannot submit a "ticket" as I did not rec

Greetings all, When using my QRP Labs 50W amplifiers (20m and 40m) with both my QDX and a Xiegu G1M for FT8 operation, I get the ‘feeling’ that the amplifiers are doing something to the transmissions

I bought two QMX kits at Hamvention and am waiting for the assembly instructions and User Manual to be available. Plan to wait until few have been assembled and tested before starting on mine. I will

. . . with the gold lettering are nearly impossible to read. I had to use my microscope for positive identification. Not a complaint. Just an observation. Ed AA3SJ

Just a quick note: the Progrock2 manual says that normal current consumption is 30 to 35mA. The one I have just put into use measured 48mA current draw. Looking closely (with several pairs of glasses!

Would it be possible to get a analog audio line out taps from the positive sides of C63 and C69 to run to a small audio amp for sound monitoring of the QDX? -- 73, Dan - W2DLC

I have a 4 power loupe from my medical practice and it works for reading the values of most parts with a daylight LED 100 w equivalent lamp over my work space but using my cell phone camera is also so

Hello all I have now completed extensive updates to the QMX page http://qrp-labs.com/qmx with photographs and the following PDF documents: 1) Assembly manual 2) Schematics (5 pages: power supplies, CP

Hi folks, Next Monday May May 29th will be the next QCX Challenge, on the regular bands. see all info on https://www.qrp-labs.com/party.html NOTE: in June I will be preparing my trip, or be on the roa

Confirmation of reading: your message - Date: 26 May 23, 13:02 To: QRPLabs@groups.io Subject: Re: [QRPLabs] QMX built but questions #qdx #firmware #enclosure #qlg2 Was read at 21:51, 26 May 23.

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

Hi! I got a QDX for Christmas this year and I haven't been able to use it once. When I fire it up, the red LED just flashes. I found I was able to put it into firmware update mode and upload firmware,

I have a QCX 50 W PA wound for 40 m that I would like to use on other bands by bypassing the LPF and attaching external low pass filters. Has anybody else done this and if so what LPFs did you use? Th

Has anyone used the 3rd and 4th Message transmissions in the TELE command. I am using WJT-x to monitor the operation. I receive and decode the standard and second transmissions ok and it would be appa

The instructions tell the right part numbers, but the BOM for Inductors on page 21 lists different toroid part numbers. Of course the parts in the actual kit are the same as the instructions.