1986 Accord LXI hatchback.

When I have the AM radio on, I get a loud popping sound from the radio speakers that is directly tied to the speed of the car. Go faster, it picks up. Slow down, it slows down. Stop, it stops. At a stop, in neutral, reving the engine does not make the popping sound. Coasting in neutral doesn't affect it.

yeah, I know, get a new antenna which it probably needs anyhow but that only solves the reception problem. What is causing the transmitting? Does this car have a cable driven speedo or electronic. The speedometer seems to work fine. The odo looks like a standard cable drive (not digital).

I just got this car. My previous Accord (92 LX wagon) never had any speedo/odo issues so I never looked at it.

Any clues on to what and where to look?
thanks,

 

Don't have any clues but can confirm the speedo is cable driven.