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FM Transmitter: Where to order?
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Howzit. I'm looking for a way to transmit FM radio. I want to see what it's like listening to a CD playing in my room when I'm down the street.
Where can I order a starter kit that can broadcast about 5kms?
Come on, I know there are enthusiasts out there who wanna help a DIY electronics puppy like me out... ;) | |
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04/10/08
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Roshi
04/10/08
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Roshi
Sorry, that was unhelpful. 
04/10/08
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adcBicycle
there's this
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5km though... that's far
04/10/08
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license
ask ricemutt
04/10/08
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adcBicycle
by the way, what do you think of the one you have pictured?
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think it would work around a house at least?
04/10/08
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jdg
the problem with your idea... radios arent just FM transmiters.. they have hugely complicated signal chains that modify the sound way before it ever hits an FM transmiter.. that is the sound you want to "hear thru" not the sound of FM transmition.
scroll down to "typical broadcast chain"
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04/10/08
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adcBicycle
so without all that pre-transmitter stuff it'll just sound a little quieter, signal won't be as strong... am i correct?
04/10/08
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jdg
and wont sound f'd up.
having been lucky enuf to hear songs i've mastered on the local radio, i know it sounds weird... esp the phase.
FM drops to mono quickly as the signal weakens..
b
04/10/08
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jdg
oops..
... but again, this is USA radio.
every station is different
04/10/08
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Otterfan
I used to work at a community radio station with a low power (100 watt) fm transmitter.
The bare minimum requirements for about 5km would be:
1) around 100w transmitter
2) an antenna placed something like 20-30 meters up above the ground
You can get startup kits at places like Broadcast Electronics for around $3500 that will meet those needs. Look at the LP100 package on the page from the link.
We started out with something like that, a CD player, and a deal with a local radio tower that let us mount our antenna. We also had a monitor to track and record our signal levels, since US law required it for our license. No other audio or signal processing. It didn't sound great, but you could play music and people could listen.
04/11/08
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skab
link
only 100 metres. 5km is a looong way for FM. How about MW?
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04/11/08
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skab
if you do get it up and running, you'll officially be a pirate, y'aaar!
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