[Elecraft] OT: LPFM transmitter wanted

Jim Brown jim at audiosystemsgroup.com
Mon Feb 19 12:28:59 EST 2007


On Sun, 18 Feb 2007 15:19:28 -0800, Rod Ai7NN wrote:

>Anybody have a suggestion or two for a decent quality
>rig that couples to an MP3/CD-player, stereo...etc. Only need to get
>the signal 50-100ft or so.

A visit to places like Fry's Electronics or Best Buy will yield several 
VERY low power FM transmitters intended for use with personal devices like 
IPOD's. I'm using one to take streaming jazz from my computer to a few FM 
receivers around the house. These are good for about 100 ft. All work with 
self-contained antennas that are almost impossible to defeat (that is, to 
attach a better antenna to), and dead simple to use. Thus, I believe that 
they DO conform to FCC rules, which are written in terms of some very low 
value of field strength at a defined distance (I think 100 ft), and that 
non-defeatable antenna system. I paid $50 for the one I have, which 
carries the Macally label and an FCC sticker of compliance. 

The much higher power kits sold on the internet (100 mW and higher) are 
NOT legal in the US. 

If you have a legitimate use for low power broadcasting and can license 
it, a well established company in PA called LPB makes the transmitters and 
can assist you with licensing issues.  

Jim Brown K9YC





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