RadCom plus AUTUMN 2024 VOLUME 09 / 02
A relay controller written using AI
Stewart Bryant, G3YSX describes how you can use the AI large-language models, ChatGPT and Gemini, to write programs for you.
The weird arithmetic behind error correction
Andy Talbot, G4JNT, describes some unfamiliar mathematics behind the digital software found in the WSJT suite. This is an essential starting point if you want to understand FT8 etc.
Operating on the 30THz band, part 4
Barry Chambers, G8AGN, gives us Part 4 of his magnum opus about experimenting in the 30THz band. (Parts 1, 2, and 3 are in the previous three editions of RadCom Plus.)
Efficient magnetic loops
Tony Preedy, G3LNP, shows how to make efficient magnetic-loop antennas, and describes in detail his own antenna and how to make it.
RadCom plus SPRING 2024 VOLUME 09 / 01
Excessive RF level protection filters
Tom Alldread, VA7TA, describes a handy add-on to your sensitive VNA or SDR, which prevents overload or damage to the input circuits.
Building and testing antenna noise cancellers
Sheldon Hutchison, N6JJA, reports on his detailed investigation into how these devices actually work, and presents a superior design which you can build yourself.
Fourier Transformations in digital communications - a geometric approach
Michael Toia, K3MT, present an entirely non-mathematical way to understand the relationship between a train of square pulses and its frequency spectrum.
The design of linear power supplies
Andy Nehan, G4HUE, discusses in great detail the finer, and perhaps overlooked, points of designing linear PSUs.
RadCom plus SUMMER 2023 VOLUME 09 / 1
Alignment of multi-resonator band-pass filters without a sweep generator
John Worsnop, G4BAO describes a little-known technique with which you can align your filter in minutes without using any fancy equipment at all.
A compact broadband active antenna for VHF/UHF: The “Scantenna”
John Hawes, G8CQX presents a broad-band receiving antenna covering VHF and UHF frequencies.
Receiver and transceiver home design and construction
Bob F Burns, G3OOU shows us how to set about the task of making a communications receiver or transceiver.
Operating on the 30THz band – part 3
