I am running the 20m version of the QCX+ without a GPS unit. I am trying to set it up to beacon in WSPR mode but it never seems to go to transmit mode. I have followed the instructions in the Operatin

I finally got my [pre-assembled] QCX-mini CW 40m on the air (don't ask) and even though I was able to make a local contact, the operation was hampered by very noisy headset connection (Heil Pro70). Ha

For portable operation I made a simple supply using a "DC DC Buck Boost Converter" and a Ryobi 18v battery. I have all Ryobi tools so the batteries are no problem. The converter is easily adjustable t

Hello, Does anyone know the part number I could use to find the right 47uH axial inductors used in the QMX? I need to get a few more. The ones I was able to buy from Amazon turned out to be too large.

"tune" shows OK on WSJT-X Slow pulsing of LED on QDX when transmitting WSJT-X shows my signals when transmitting Signals are received on other receiver in shack Antenna is resonant (MFJ base loaded wh

I did comparison BPF scans of my QMX (rev 1) with my QDX (rev 2, f/w 1.4). QDX scans look good, QMX okay on 80, 60, 40, & 30m, but poor on 20m. Readings pretty much match my CW estimates of sensitivit

I've built three QDX units so far and they all work fine, but now I've hit a snag on #4. Rev 3a PCB, I removed the short at the very beginning of the build. Built for 9 Volts. Power-on with a 7.5 Volt

No one is receiving me on FT8. Transmit seems to be working: signal OK on WSJT-X "Tune"

Sometimes slippery little capacitors are packed really tightly together and are very difficult to hold for removal. This has worked for me. 1. Tie a slip knot noose in a 8 inch piece of dental floss (

I built 2 of the 10A Power Amplifiers and in testing I managed to fry both of them. For testing I connected the input to an RF signal generator (BK-Precision E-200D) and the output to a 50Ω resistor.

Goodmorning, I believe I have ruined the LCD daughterboard that goes with my QCX+. The main board build went fine (other than the board being powered on with transistors Q4, Q5, and Q7 not installed..

I read "horror" stories about a bad - , not -, half working QDX's. But against those few incidents mentioned here in the group there must be hundreds of hams with QDX transceivers which are running as

Hi all I returned home from Dayton Hamvention on 23-May-2023. Now more than 2 weeks later, I am still not even close to managing to catch up with the missed correspondence (emails, helpdesk tickets) w

I have completed the build of QMX #008! Now the search of the shop to locate a 12V source to power it up. I've read the concerns of not exceeding 12V - and the 13.8V on the bench is too high. SLA batt

Hi all Hannes DL9SCO (Palm Radio keys) is visiting for a few days and we took a QMX out for an afternoon of mountain portable operation here in SW Turkey. Had great fun on 20m CW. TA4/DL9SCO had 8 QSO

I just successfully finished building two qmx's. I haven't checked out the sensitivity or plots yet. Never built a qdx so am unfamiliar with things such as plots... Anyways a little reading and I'll b

Hey Hans and the gang; I finished up my QMX (serial number 100) on Tuesday evening and added in the ALPHA firmware load the following/yesterday evening. Here's my list of "Mis-Steaks" (including sugge

This month, a year will have passed since my brother Robb (N2VJO) presented me with a QDX as a birthday gift. A very thoughtful gift indeed; for he purchased a pair of them on the premise that we coul

Well, my QDX may not be on *ALL* bands but give me time ! 72, Bill, N4QA

Looking for help to get my 10W HF Amp working. I am able to set quiescent current for PA stage but can't get any output. I suspect there is a problem with the driver stage. Measured voltages are:- Q20