Crystal Radio + Free Antenna Energy for amplifier & speaker @doubleMinnovations

Crystal Radio + Free Antenna Energy for amplifier & speaker @doubleMinnovations

Uploaded April 2025 | Updated September 2026, 2 weeks ago

Antennas not only power the crystal radio, but an amplifier and tweeter as well!

Magnesium/carbon fiber graphite jar battery: "youtu.be/GDODCRYBgSc"
Antenna energy harvesting: "youtu.be/06ku4qFwP-4"

Crystal Radio + Free Antenna Energy for amplifier & speaker

Changing heat directly into electricity (D.I.Y.)

Advances in Nitinol Heat Engines: My 3rd design

Closer look, part 2. Secrets to a hot clean burn.

Fences sucking power from under HV transmission lines

(2) Antenna-ground energy receiving circuits explained

Natural Stone Hybrid Fireplace; a closer look. Part 1

Robert Murray-Smiths homemade nuclear battery

48% more run time than standard carb. on 750 watt load.

DIY Rocket Stove Water Heater, (part 2)

Steam locomotive sounds coming from my new steam turbine design

(Part 2) DIY, Inexpensive Rocket Stove Building Material

Double M Innovations |

Crystal Radio + Free Antenna Energy for amplifier & speaker