Low Power FM Transmitter?

There are no ham bands around the 88-108 band, so there are no ham thingys that will work.

You don't want to mess around the frequencies above 108MHz, as that¹s the aircraft band and you could easily interfere with directional signals (VOR).

There are gadgets being sold that do what you want. They are called FM RF Modulators. Google that and you will get leads to sellers. It is best to buy one that meets the FCC requirements.

Don

Ralph, This place has a few kits that might be of interest.

-- Tony Marsillo Nutmeg Repair

YIPES! I'm right under the backup approach of the local airport... so that might be a *really* bad thing here. :-o

Combined with Car Audio and such, there are so many of those new ipod transmitter gizmos out there now that searches turn up 300,000 hits... and I need something considerable stronger than one of those (have one... tried it... works great in the house only... but it eats batteries, hums with cigarette lighter adapter and doesn't reach the driveway let alone across the fields).

I'll sit down later and see if I can find a way to narrow the search parameters so as to exclude some of those.

Thanks for at least getting me started!

Thanks. I have not done any PCB soldering since High School Electronics Class some 32 years ago... but likely still have the stuff I need in my Dad's workshop. Can't say I'd be comfortable doing it now, though, even with having built many computers it's not the same skillset.

Built ones seem to be going for 50 to 100 beans US over kit price, which seems a little pricey for what I want to do (get a signal from here to the barn and such). I've not done anything with HAM or other radio in the same span, but maybe I need to get the greymatter flowing on who some of the 1st and 2nd class guys were in the area and see if they have any leads on one with a locked frequency used.

Thanks again.

I have fooled around with the simple one chip stereo transmitters. I was getting almost 1000 feet with a slightly longer antenna than recommended, but this was noiisey this distance, and tended to follow the power poles. With the recommend antenna, these are legal.

greg

The devices sold to convert to stereo car radio may be signal limited. I have also have one that attaches to the car radio antenna. The signal must be attenuated in that case. The others may have too short of an antenna system.

The stereocaster, $29.95, is the one I have fooled with. Getting the input gain set was the main problem.

greg

Are you trying to broadcast your own music around the farm? I've built Harry's stuff:

I've got it around here somewhere. It worked pretty well. Richard

I have a Ramsey FM-25B which works very well, though it's a bit pricey. I built it from a kit but it was not difficult, they may offer an assembled one too.