Secrets of Shortwave Radio
18:46
We Emailed Nuclear Codes via Shortwave Radio!
21:25
An Introduction to Radios and Emergency Communication
3:33:33
Apenas ouça! Frequência de Deus 1111 Hz: Milagres inexplicáveis se estenderão por toda a sua vida
19:58
FreeBSD: The Really Alternative Desktop OS
14:07
Secret Shortwave Signals That Remain An Unsolved Mystery
22:46
The BEST Ham Radio You've Never Heard Of - Hilberling PT-8000A
17:12
4 of the Creepiest Signals from Space Converted to Audio
3:58:39