How do I set up QDX rev3 as a general sdr receiver.? I would like to hear the receiver in action . using wsjt-x at the moment and working ok but not able to hear the received signals.( although they a

Just wanted to say thanks to Hans for the nice Chat we had at QRP Labs booth in Friedrichshafen. Finally we´ve met in person. And I used the chance to buy a QDX Kit. Stay awesome ! 73 Manuel; DL2MAN

Hi I have built QDX version 3 and it works fine on 80m (4.86W) and 40m (3.69W) but I am getting only about 0.8 watt on 30m and 0.23W on 20m. These powers have been measured with a spectrum analyser vi

Hi All I was wondering if there is anyone out that would be willing to look at a QCX+ for 20m, I just built. It is working as far that it turns on and goes the intro and then it switches to the 20m fr

Hi all, I have installed the link on the printed circuit to be able to see what the rf output is. The connect is between" RF"and " DVM". There us no read out. I have checked I have 4.5 watts using pow

I was recently gifted a box of QRP Labs kits received in 2017 by a friend who lost interest. Does anyone have a recommendation for a stable quiet transformer wall wart 5 volt supply to run it and the

Hi all, disclaimer first: I am purely a hobbyist and not an electrical engineer, so I fully expect myself to miss a point or two, and to not have all the tools or knowledge to debug this problem; that

I did a quick scan of the filters and was disappointed. Maybe someone here has seen this problem and knows what I did wrong.?. All bands seem to be peaking too high. Need some help please. Thanks, Ric

I thought I would offer this here before putting it up on QRZ classifieds or something. I have an unbuilt QCX Mini kit for the 20M band with the TXCO option and case. This is a Rev A version of the QC

Thought I would try operating from a local park - Bloody Marsh Park - QRP for Saturday afternoon, 1BGA. I set up the antenna in minutes - a W3EPD 82' wire up 50' (!) with a 15' counterpoise, sloping t

Tell me: Distance..... Time of day..... Band condx..... Antenna type and set up and Which radio?

The following post is a corrected message. I got some of the numbers wrong, I was in a rush. Got it finished off and the only problem is I get an indicated 2.3w with 13v. If I turn my power supply all

I re-send my old topic because I didn't find a solution. I was very surprise because DC voltage at input pin 7 and pin 9 of is higher than 2.5V (about 3.6V) . I unsoldered these inputs, of course the

QCX or QDX? Answers are different for each radio. Jim W4JED

My Rev 3 QDX - 9V - receives fine on all bands. Audio and RF sweeps look reasonable but responding to a CQ ( or using Tune ) fails ( 2 flashes ) if the transmit frequency is below 846 Hz on all bands.

Hi there, I built my QDX for 9V but used the 12V regulator mod form Dan, NM3A (#84119). The Voltage regulator is screwed to the center of the top-case and I used an extra aluminum cooler on the finals

Hello, Allison-- I second Mike McCarthy's plea regarding your exit from the QRP Labs group. Your contributions are consistently worth reading-- and pondering! 73-- Brad AA1IP -- Sent from Postbox

Hi: I just finished my QDX, wired for 12VDC. I'm getting about five watts output on all bands and the receiver works great. But I think there's an issue with my transmit audio. Listening to the QDX on

My findings: No power at all at the BNC upon transmit. Continuity from the center of the BNC socket to c29 is good. Checked the capacitors involved in the transmit circuits, no issue. In receive, Q6 h

Hello: I just built a QCX mini. Almost all seems well. My sidetone is clear and pleasant audio when I listen through headphones while keying the QCX mini. However, when I listen to my sidetone on a ne