Hi. I have a 91 CRX Si. I recently installed an in-dash communications receiver so I can listen to shortwave. Unfortunately, there is a little more RFI (Radio Frequency Interference) present then I would like. The source definitely appears to be ignition related and is being induced via the antenna not the power source.
I've replaced the plugs and ignition wires with resistive units and checked the grounding of the antenna and hood.
I'd be interested in hearing from anyone who has successfully resolved these problems in the CRX or similar models.

Thanks !