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Recycling an old Smartphone to easily remote VLF probes

All this started when I decided to move my home made geophone from my lab room to my cellar at about 3 meters under the ground. It was a better position for this device because of absence of electro-magnetic noise. Only a simple 220VAC socket and an incandescent lamp are located in the cellar, no […]

VERY IMPORTANT !!!! Emergency end.

The emergency is end

On Monday, May 12 at 0628 UTC, a magnitude 7.8 earthquake hit Sichuan, China. According to the Chinese Radio Sports Association, the Chinese IARU Member-Society, the following frequencies are reserved for emergency services involved in the rescue: 14.270, 7.050 and 7.060 MHz.

Lunedì 12 maggio alle 0628 UTC, si è verificato […]