androide10:
Qualcuno sa quanto può trasmettere in campo aperto un'antenna di 30cm?
allora, come da manuale del prodotto, l'antenna dovrebbe essere circa :
Theoretically the antenna length for 100Mhz is 75cm.
... mentre per il resto :
In most countries, it is illegal to build personal radio station if your radio station signal covers a large area. Without any external amplifier and with our simple antenna, this module could transmit about 50m in open area. We test it in a building. And we adjust the module’s antenna and location to make sure it would not interfere with neighbors.
Guglielmo