I have not made a video in many years, so please go easy on me. Since the new QCX models don't have the on-board microswitch key, and it's nice to not have to lug around a full-sized key on remote loc

I had my new QCX mini on the air briefly. Functioning correctly. I inserted a 50 W amp (unpowered) between rig and antenna. The rig developed a loud buzz. The buzz got louder when I turned up audio vo

Good morning, yesterday I tried a several month old idea: a very simple CW paddle built from two microswitches with levers. It is inspired of course by the microswitch straight key in the original QCX

Hello, Any insight would be appreciated: QCX mini new build, 40m RX seems OK. I can hear other stations when I connect an antenna. With a dummy load: STRONG signal at BS170 PA drain, 70V peak NO signa

I successfully built a QCX Mini 40m with only a few self-induced hiccups that needed de-soldering. Alignment is fine as per instructions. Using it showed that the audio level adjustment using an ampli

Ultimate U3s kit, orginally built without OXCO, ~250mA RF output, GPS input. Assembly went without hitches, Clock output tested at 27 MHz at every stage. System worked well until shack temperature sta

Hello fellow builders, I am here to request your help for fixing my 40m QCX+. I built it about 2 months ago and have been using it to make contacts without any issues since then. I didn't have time to

I just converted a 40m QCX to 30m. Pretty sure I changed all of the band dependent components, and rewound the toroids according to the 30m spec. Initially, I got 0.125w output on TX, So far, I've rem

Thanks to the help of several hams here on the group, I have finally fixed the problem I was having with not being able to align the receiver of my QCX-Mini! The problem I discovered was something tha

Here is my QCX mini on a stand built by master craftsman, Paul, W4KLY. The stand is available for the North Ga QRP club

Hi all, I have a QCX40 Rev 4. When supplied with 12V, the output signal measured into a dummy load is 3.16V pk-pk as measured as Hans does it here (I am even using the same scope!) - https://youtu.be/

Hi All, TL;DR - My first WSPR transmission messed up the connection on L3 and cause no RF power out, simple fix but took a while to figure out what happened and how to fix. I figured I would share wha

Tomorrow, January 17th is the 3rd Sunday of the month, which menas it's time for the monthly Run For The Bacon, proudly brought to you by the Flying Pigs QRP Club International. A friendly lil' QRP Sp

I want to rewind the T1 and T2. Manual p.14 lists this as 0.6mm. Where can I buy some of this and how is it specified? Thanks Brian N N7BKV

Hi All, I finally got my T1 wound and installed. While soldering it into place I pulled on the wires while soldering to cinch up T1 close to the board, and the wire at point 3 broke. I will not bore y

For those aspiring to learn/pick up their code speed, I have KC9ON's 3CPO keyer/code practice oscillator featuring the YACK keyer with a button control interface. It offers the usual keyer amenities (

I have a 20m QCX mini that came with a missing/broken SMD cap and other various poor soldering. I attempted to fix the problems, but I made it worse, and I think I ended up shorting the voltage regula

What a massive difference a linear power supply makes to the receive background noise. I knew already that random switch mode supplies are bad news for rx noise level, but that didn't stop me pressing

I bought this little jewel mostly for a build project and now it needs a home where it will see more use. Comes with case and a 3D printed folding stand attached. Looks and works perfectly. More detai

This text has appeared in the Drafts folder on my Mac. I did not originate it nor do I have the simulation. BEGINS For anyone interested I have a simulation in LTspice of the CW filter. See my web sit