87.5 FM is the first useable radio broadcast frequency on the FM radio band spanning between 87.5 and 108 FM or VHF Band 2. The use of 87.5 FM as the main carrier frequency of a legally established and licensed radio station is rare in most countries as it transmits signals slightly off band down to roughly 87.3 and possibly as low as 87.2 FM.
In the United Kingdom, radio station broadcasts on 87.5 FM are likely pirate radio stations as there are no known radio broadcasting licenses that are allocated to 87.5 FM (within the United Kingdom). There are a few licenses for 87.6 FM, however, most transmit on 87.7 FM and upwards.
Many short range transmitters intented to be used inside of cars operate at 87.5 FM and allow the user to stream music from their device to older car radio's or devices lacking Bluetooth connectivity.
In Brazil, the frequency 87.5 FM is one of the frequencies reserved for community radio stations. These stations have power limited to up to 25 watts and coverage limited to a radius of up to 1 km.[5]
2 Shortwave uses a combination of AM, VSB, USB and LSB, with some NBFM and CW/morse code (in the case of time signal stations) as well as numerous frequencies, depending on the time of day/night, season, and solar activity level. A reasonably full list from 16 kHz to 27MHz can be found at [1]
3 Regions 1 and 3 also use Region 2's frequencies as well, with 50 to 100 kHz spacing.
