FM Radio broadcasters

Does anyone have any experience of these?

LINK receiver chips are pretty cheap also. 

Hemisphere wrote: LINK receiver chips are pretty cheap also.

If you want to go down that path, I'd suggest the all-in-one FM/Bluetooth/CF/USB/MP3 units so you have versatile playback options. Dump a bunch of mix MP3s on to CF card and leave it in the unit so you always have music on hand
Again, have a few of them to play with but haven't gotten that far yet

be careful using frequencies other than 87.5 - 108. Below 87.5, as suggested above, is used for emergency services and mod, just above 108 is used by the CAA (Civil Aviation Authority). see here for a list of last years, 2013, frequency allocation.

Another thing to remember that if using cheap transmitters you will get lots of harmonics, if you can check on a spectrum analyser to make sure your not broadcasting on multiple different frequencies


Edited by MessyM2k8 - 20 November 2014 at 2:20pm

Yes the FM bugs have a big problem with harmonics, the tour guide's belt pack seems not to cause interference though. I didn't know about the potential interference with emergency services communications, although on close inspection of that enormous document it does seem that Mountain Rescue are allocated a band around 80 MHz, so definitely best to keep away from there. At the end of the day if "CHHH - Charlie uniform november tango, what's your position, over - CHHH" an' that starts coming thru the rigs, we'll know what's going on straight away, and turn the bloody thing off ;)