Krystalka s rámovou antenou

Krystalka s rámovou antenou
Vydáno dne 02. 03. 2009 (739 přečtení)

podle Ramona Vargase (text v originále - anglicky)

Novy1 Hello dear friends,

I finished last night the assembly of a crystal radio using a 100cm x 100cm loop antenna with a 5082-2835 Agilent Schottky diode, matching audio transformer (24H primary and 93mH secondary), a pair of magnetic homebrewed headphones and a 300k//0.22uF Benny (variable resistance).

Fifteen stations have been tuned indoors. Two are rather weak, only heard in a quiet room. The other stations come in with very good volume. All transmitters with less than 30kW, and 10+ km away. The furthest coming in is 30km away and 12kW. My listening area is on a second floor indoors. Have not tested it outdoors yet.

Apologies for the pictures’ quality, but my cellular phone is quite poor taking good photos. I see them nice in my phone, but when downloaded to a PC they look kind of “snowy”.

Very best regards,

Ramon

( Celý článek | Autor: Krysatec | Počet komentářů: 5 | Přidat komentář |

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