QEX Nov-Dec 2024

[KX4QC]

A fine new issue of the experimental journal included with ARRL membership.

This month, some items caught my eye:


Decoding Morse CW with a Variable-
Length Self-Synchronizing Code
Mark R. Titchener, ZL4CDE
This explains in detail not only how a self-synchronizing coder/decoder works, but also the circuitry needed to filter and delive a pure stream of code from the radio. The article is interesting, not only because it shows exactly how to perform the trick, but also how the method could be adapted to other codes, maybe Murray even. Many computer CW decoders are so much worse than an ear, but this shows how to make a good one!

Using Amateur Radio Data to Improve
Intense Sporadic-E Observations
Daniel J. Emmons & Ken Neubeck, WB2AMU
After a lousy Es season that didn't really materialize, analysis of propagation data seems ever more important to make best use of these transient opportunities.

The Design and Implementation of a Zadoff-
Chu Sequence for AGC Burst Transmission…login to view the rest of this post