The Humble Breadboard
A first practical look at solderless breadboards, including what I learned by checking the internal connections with a multimeter instead of assuming every board was wired the same way.
Ham radio, antennas, field systems, and bench work
Practical radio work, tested in the open.
Follow antenna work, radio projects, bench checks, field notes, and small tools with the useful details and unresolved limits kept in view.
Choose a path
Start with the kind of work you need.
Each section has a different job: explanations, shorter observations, evolving builds, quick tools, and references worth keeping nearby.
Understand a concept
Articles explain antenna, RF, tool, and test-method ideas with the limits left visible.
Read articlesCheck recent observations
Lab Notes record shorter bench, field, radio, electronics, antenna, and power observations.
Browse Lab NotesFollow an evolving build
Projects track longer-running builds, revisions, measurements, mistakes, and next steps.
View projectsSolve a quick problem
Tools are small calculators and utilities for immediate bench or field decisions.
Open toolsKeep a checklist handy
Resources collect checklists and references that are useful enough to keep nearby.
Browse resourcesRecent and representative
Work available now
A small selection from the current published notes, articles, projects, and resources.
Testing the UNI-T UTP3315TFL-II Bench Power Supply
Initial bench validation of a new UNI-T UTP3315TFL-II bench power supply before the return window closed, including voltage checks, simple load testing, and first observations.
What a 4:1 Unun Does in a Portable HF Antenna
A beginner-friendly explanation of what a 4:1 unun does, how it differs from a common-mode choke, and why it is useful in portable HF antennas like the Rybakov.
ESP32 Radio Control Head
An evolving CYD-based touchscreen control-head project for FLRig status, presets, and non-destructive radio-control experiments.
Portable Radio Field Checklist
A packing and setup checklist for radio, power, antenna, logging, and safety items used in the field.
How to read this work
Useful beats finished-looking.
Pages here are allowed to show limits, missing measurements, and next tests. A short honest note is better than pretending an experiment is more complete than it is.
- Real measurements and setup notes when they exist
- Clear labels when something is only a seed, draft, or early test
- Practical next steps instead of polished certainty