How can I tell if interference is being caused by a pirate radio station or foreign stations?

Interference from pirate radio stations and foreign stations can sometimes affect radio reception, but there are often clues that can help identify the cause.

Signs of interference from foreign stations

Foreign stations are most commonly heard on AM (Medium Wave) and occasionally on FM during certain weather conditions.

  • The interference is usually more noticeable at night.
  • You may hear another station fading in and out behind your chosen service.
  • Reception may improve again during daylight hours.
  • The problem is often linked to high-pressure weather conditions, which can allow radio signals to travel much further than normal.
  • Several stations may be affected at the same time.

Signs of interference from a pirate radio station

Pirate radio stations are unlicensed broadcasters that can sometimes cause interference to nearby radio services.

  • The interference is usually limited to a specific area.
  • You may hear music or speech that is unrelated to the station you are trying to listen to.
  • The problem may occur throughout the day rather than only at night.
  • The affected frequency may become completely blocked or distorted.
  • Other listeners in the same area may experience similar problems.

How can I check?

  • Try listening at different times of the day. If the problem mainly occurs at night, foreign station interference is a likely cause.
  • Compare reception on another radio if available.
  • Ask neighbours if they are experiencing the same issue.
  • Check whether weather conditions, particularly high pressure, may be affecting reception.

In many cases, what appears to be interference is actually caused by atmospheric conditions that allow distant stations to be received alongside your local service. This type of interference is usually temporary and will improve once conditions change.