This is an application that was written for a customer who wanted to see what broadcast transmitters were nearby. Ofcom produce a resource known as TXParams which offers AM, DAB and FM transmitter data (location, ERP, RDS and such).  Their CSV files allow for easy handling of this information making a database (or map) quite straightforward – if you put in the coding effort!

My solution allows you to specify a frequency (or “all”) and select a range – you are then offered a list of matching transmitters/stations in order of distance from your location.  Uses include: Identify a potential frequency for a new service (like a Community Radio Station) or simply to find out what stations are nearby and what services you can get from a nearby DAB multiplex.  An option allows you to filter for nearby Community stations.  You can also find for a specific service within a set distance, eg: Find all BBC Radio 1 transmitters within 100 miles and so on.

This was a quick ‘n’ dirty build and would work much better in a browser using PHP, MySQL and a mapping interface (such as OpenStreetMaps) – as, at the time, I couldn’t find an existing solution (although there is now a map version available here) that offered the data in a “human readable” form.

RadioLookup SoftwareResults offered included: Distance, Frequency, Station/Service, Location/Site and In-Use ERP.  Additional features available to the client included an ERP filter plus a “clear frequency search” offering potential “gaps” on the FM band.  This works via the location+range filter plus removing frequencies +/-200KHz either side of the “offending” service – a very non-scientific method but provides a general idea of how cluttered the band is!

Download – offered “as is” without support

RadioLookup Setup  (updated 18th June 2019)
This basic version is FREE and can be used as often as you like.  Over 60 pre-set locations are included, but up to 100 can be defined.  You can run the latest installer “over the top” of an existing one without losing your location presets, it’ll just update the OFCOM database.

Examples of use :

  • Identifying potential frequencies for a new service on AM or FM
  • Finding out how many Community Radio stations are within nn km/miles of you
  • Finding all transmitters for a particular station within nn km/miles of you
  • Seeing what services you can pick up when you travel to a different part of the country