RADIO casera SIN ELECTRICIDAD. Fabricación a mano de la RADIO GALENA y su curioso funcionamiento
4:57
Homemade Radio
17:35
How a quartz watch works - its heart beats 32,768 times a second
7:02
"Dry stone" walls built by hand without mortar to delimit land
22:34
ENERGÍA INALÁMBRICA DE TESLA | Radio galena: energía gratis
8:01
Make a Crystal Radio Receiver - Part 2 - Making and Building the Scout's Crystal Set
20:26
The harpsichord. Strings and keys combined to make this instrument step by step by hand
12:58
How a Crystal Radio Works
21:03