Uploaded December 2023 | Updated September 2026, 3 weeks ago

---

I had a crazy crystal radio fail that was very difficult to track down. I want to get the word out to people so they can look for this insidious problem. Don’t want parents and grandparents to have a disappointing time with kids, or to discourage any future techies getting their start with crystal radios. The radio was working, then it quit and every part I checked seemed OK, except for the least suspected.

PSA: Crystal Radio, Devious Bad Part Problem Pt 1 – Spread The Word
youtu.be/QqOI681YpQQ

PSA: Crystal Radio-Bad Earphones Pt 2–Teardown & Compare (4K)
youtu.be/yBxo8CaY4HY

PSA: Crystal Radio-Bad Earphones Pt 3 FIXED!!! (4K)
youtu.be/rKeS6vSOu3k

Crystal Radio Fake 1N34A Diodes! Easy Test (4K)
youtu.be/H8XlZ7Mry4M