Another day, another SDR post. Following my "series" of STM32G431 with embassy posts so far it now has a PWM controlled analogue s-meter display!

#hamradio #homebrewradio

https://youtu.be/kvnnYvCPlYQ?si=Bvty3j2oS1WMNJVv

Successfully integrated an S-meter into the STM32G431 SDR project. Really happy with the results so far. The next phase will be developing the transmit functionality.

#hamradio #homebrewradio

https://youtu.be/e6Ayrndkbf8?si=2auk_MWa9x96w5Y6

I repaired a friend's QMX+ transceiver today.
A the BS170 mosfets in the PA were fried along with the driver, an 74ACT08. In addition the PA VCC modulator mosfet was also toast.

The BS170s were quite difficult to remove as their sources are connected to the PCB ground plane which turns out to have an amazing capacity for absorbing heat. Even my 140W desoldering gun had trouble. The PCB held up though -- no lifted traces, which is excellent.

Time to remove the flux!
#hamradio #homebrewradio

And this is the second part of my embassy-rs Rust SDR transceiver project. Now with working SSB filtering. It's using a 14 pole differential all pass phasing network for modulation (tba) and demodulation. It works pretty well I think. I really am liking embassy-rs.

#hamradio #homebrewradio

https://youtu.be/vMqo8NDkoYA?si=dr-JNdehsx6cVcjh

This is a video of my STM32G431 based SDR transceiver. Previously a fully working radio I built with the firmware written in C++. I was never really happy with the interface, and I got bored with C++. So I took up the challenge of a redo of the firmware in Rust using async embassy-rs and a new control interface (in this case running a RPi Pico also running Rust). This is its first step as a working receiver. #hamradio #homebrewradio

https://youtu.be/o7J_LPqK1NE?si=eC2gYkZaOmhFWpJx

Just published a new technical deep-dive on the LARCSET v3.0. 📻

While the LARCSET is an incredible piece of kit, builders often run into specific hurdles. This post compiles real-world problems and proven fixes sourced directly from the Bitx20 community to help you get your build running smoothly.

Topics covered: 🛠️ Common assembly pitfalls 📡 Signal purity and tuning ✅ Community-tested solutions

#HamRadio #AmateurRadio #Bitx20 #LARCSET #HomebrewRadio #QRP #VU3DXR

https://vu3dxr.in/building-the-larcset-v3-0-real-world-problems-and-proven-fixes-from-the-bitx20-community/

Just published a new technical deep-dive on the LARCSET v3.0. 📻

While the LARCSET is an incredible piece of kit, builders often run into specific hurdles. This post compiles real-world problems and proven fixes sourced directly from the Bitx20 community to help you get your build running smoothly.

Topics covered: 🛠️ Common assembly pitfalls 📡 Signal purity and tuning ✅ Community-tested solutions

#HamRadio #AmateurRadio #Bitx20 #LARCSET #HomebrewRadio #QRP #VU3DXR

https://vu3dxr.in/building-the-larcset-v3-0-real-world-problems-and-proven-fixes-from-the-bitx20-community/

Peter VK3YE builds an interesting direct conversion receiver using just 4 transistors and almost no coils.

https://www.youtube.com/watch?v=qM2egGkuy-w

#hamradio #homebrewradio