Post by thread:[OT] RF modules

I've found that vendors carry RF transmitter and reciever modules using 433.9Mhz and 418Mhz, but nothing between; even though (here in US) that area is defined as "amateur." Is it possible to use the bandwidth between 418 and 433.9Mhz? Are modules even available at frequencies in-between? John

John P. Leonard wrote: > I've found that vendors carry RF transmitter and reciever modules using > 433.9Mhz and 418Mhz, but nothing between; even though (here in US) that > area is defined as "amateur." > > Is it possible to use the bandwidth between 418 and 433.9Mhz? Are modules > even available at frequencies in-between? The reason only these frequencies are available is that 418 MHz is a special frequency where no transmitter license is required in Britain, and 433.92 MHz is the same thing for the rest of (most of?) Europe. My guess is that these transmitters are made or designed in Europe (Radiometrix?). Martin Nilsson http://www.sics.se/~mn/ Swedish Institute of Computer Science E-mail: spam_OUTmnTakeThisOuTsics.se Box 1263, SE-164 29 Kista Fax: +46-8-751-7230 Sweden Tel: +46-8-752-1574

John P. Leonard wrote: > Is it possible to use the bandwidth between 418 and 433.9Mhz? Yes, of course. *IF* you hold an Amateur license. > Are modules even available at frequencies in-between? Dunno. Amateurs are not a *really* high-volume market for do-it- yourself modules. Curiously enough. Cheers, Paul B.