Uploaded July 2012 | Updated September 2026, 3 weeks ago

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Step-by-step video for how to make an amplifier for a crystal radio earpiece. Something a few of you asked for. In my other video about this I didn't do each step. Instead I gave a diagram, showed how to use a breadboard and then how to use the diagram to fill in the breadboard. In this one I show inserting each resistor and capacitor and the transistor, along with a diagram more suited to a breadboard. And then I show the steps of wiring to the crystal radio's ground and diode and to the 9 volt battery.

Here's the other how to make an amplifier for a crystal radio earpiece video:
youtu.be/cQ-LxMDrD_o

See also my video, "How to Make a Crystal Radio":
youtu.be/VqdcU9ULAlA

See also my webpage about my crystal radios:
rimstar.org/equip/crystal_radios.htm

Follow me on Twitter:
twitter.com/#!/RimStarz

rimstar.org