Uploaded January 2026 | Updated September 2026, 2 weeks ago
Let's look at a pre-built crystal radio from online that's supposed to be ready-to-use, with a variable capacitor, inductor, diode detector, and audio transformer. It looked promising, with minimal setup, it's pretty much a dud: no stations, no static, and no response even when driven with a signal generator at audio and RF carrier frequencies. If you’re interested in crystal radios, passive receivers, vintage electronics, RF fundamentals, or avoiding bad DIY purchases, this experiment is a clear case study in learning by testing.
UPDATE: I replaced the ferrite coil with a 2 inch air core coil and could get 2 stations, badly. Still not worth it.
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(Diode Radio) World's Simplest Radio youtu.be/mlBfAI_55Mk
(Single Wiper) Best/Easiest DIY Crystal Radio - No Batteries, No External Power youtu.be/fLVCqZGpv3U
(Dual Wiper) My New Favorite! Crystal Radio with Antenna Tuner youtu.be/mh5KxCpbQ5U
(Single Capacitor) Crystal Radio--No More Variable Capacitor Designs?
(Single Capacitor 3D Printed) Crystal Radio--1 Variable Capacitor, 3D Printed (4K) youtu.be/ErhvVGM6mhY
(Single Capacitor Ferrite Rod) Crystal Radio--Ferrite Coil Model #2 youtu.be/CgJ5kqDT-0A
(Dual Capacitor) Crystal Radio, Capacitive Tuning - WORKS GREAT! youtu.be/VJ80Nm9KSkE
Disclaimer: This information is presented as entertainment only on an "as is" basis and any use the viewer makes of it is solely up to them, and it is their responsibility to determine if the information remains current and if it is applicable to their situation. The viewer is responsible for any and all safety involving this. Viewing this video is the viewer's agreement to these terms and conditions. If you do not agree, stop now.
#CrystalRadio #DIYElectronics #RFEngineering #VintageTech
Let's look at a pre-built crystal radio from online that's supposed to be ready-to-use, with a variable capacitor, inductor, diode detector, and audio transformer. It looked promising, with minimal setup, it's pretty much a dud: no stations, no static, and no response even when driven with a signal generator at audio and RF carrier frequencies. If you’re interested in crystal radios, passive receivers, vintage electronics, RF fundamentals, or avoiding bad DIY purchases, this experiment is a clear case study in learning by testing.
UPDATE: I replaced the ferrite coil with a 2 inch air core coil and could get 2 stations, badly. Still not worth it.
RELATED VIDEOS:
(Diode Radio) World's Simplest Radio youtu.be/mlBfAI_55Mk
(Single Wiper) Best/Easiest DIY Crystal Radio - No Batteries, No External Power youtu.be/fLVCqZGpv3U
(Dual Wiper) My New Favorite! Crystal Radio with Antenna Tuner youtu.be/mh5KxCpbQ5U
(Single Capacitor) Crystal Radio--No More Variable Capacitor Designs?
(Single Capacitor 3D Printed) Crystal Radio--1 Variable Capacitor, 3D Printed (4K) youtu.be/ErhvVGM6mhY
(Single Capacitor Ferrite Rod) Crystal Radio--Ferrite Coil Model #2 youtu.be/CgJ5kqDT-0A
(Dual Capacitor) Crystal Radio, Capacitive Tuning - WORKS GREAT! youtu.be/VJ80Nm9KSkE
Disclaimer: This information is presented as entertainment only on an "as is" basis and any use the viewer makes of it is solely up to them, and it is their responsibility to determine if the information remains current and if it is applicable to their situation. The viewer is responsible for any and all safety involving this. Viewing this video is the viewer's agreement to these terms and conditions. If you do not agree, stop now.
#CrystalRadio #DIYElectronics #RFEngineering #VintageTech
