Uploaded December 2025 | Updated September 2026, 2 weeks ago
A budget amplifier for crystal radios and audio experiments. This is a quick review of the Little B Megaphone. A current stand-in for the old Radio Shack battery-powered amplifiers that I used for crystal radios, laser communicators, and other electronics projects. We will walk through its controls, inputs, USB/TF playback functions, rechargeable lithium battery, look inside, and show my custom audio-out modification that lets you connect an external output. Whether you're building a crystal set, testing audio circuits, experimenting with detectors, or just need a cheap, portable DC-powered amplifier for bench work, this tiny device delivers surprising sound quality at a fraction of the cost of other gear. We explore its internals, discuss pros and cons, and demonstrate why this inexpensive amp is a great addition for DIYers, electronics hobbyists, radio experimenters, and anyone who wants reliable, battery-powered amplification for home science projects.
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 #DIYAudio #ElectronicsProjects #RadioExperiments
A budget amplifier for crystal radios and audio experiments. This is a quick review of the Little B Megaphone. A current stand-in for the old Radio Shack battery-powered amplifiers that I used for crystal radios, laser communicators, and other electronics projects. We will walk through its controls, inputs, USB/TF playback functions, rechargeable lithium battery, look inside, and show my custom audio-out modification that lets you connect an external output. Whether you're building a crystal set, testing audio circuits, experimenting with detectors, or just need a cheap, portable DC-powered amplifier for bench work, this tiny device delivers surprising sound quality at a fraction of the cost of other gear. We explore its internals, discuss pros and cons, and demonstrate why this inexpensive amp is a great addition for DIYers, electronics hobbyists, radio experimenters, and anyone who wants reliable, battery-powered amplification for home science projects.
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 #DIYAudio #ElectronicsProjects #RadioExperiments
