In the near past I purchased a totally reconditioned OEM radio for the Mark .....However I'm having problems receiving both AM/FM stations in my location.....We're right in the middle of weak area for receiving signals (between San Diego and Riverside Ca) so I'm wondering if there is some kind of signal amplifier I could install to solve my problem.....Now I do get some stations really good on FM but not a lot of the others on FM.....AM you can forget it nothing but static....Anyone help me out?.......Bruce L. Hansen.....Senior Citizen.....Alive by the Grace of GOD