Sirius starmate hiss on FM

My Starmate replay sat radio causeds a pretty loud "hiss" on the FM channel. It sounds like the old casette tape hiss of yesteryear. If I put my hand on the sat radio, the hiss stops. I've tried switching the FM channels, it's still there. I know there are antenna adapters that insert the output directly into the FM radio antenna line, and there are PIE adapters for my vehicle (2001 Ford F-250 pickup, indash radio w/CD and tape), but sometimes I use a different company truck and like to bring the sat radio with me.  Any ideas?

If that unit has a jack for an external antenna.Get a plug(2.5mm or 3.5 mm) and solder a 5 or 6 inch piece of wire to the tip connection of the plug.Plug it into the Sirius reciver and you should be good to go.BigDog

Thanks, that's an idea!  I wonder why the Starmate doesn't have enough RF output for the FM radio to receive? It's mounted about an inch from the side of the FM....

Sometimes they work fine, some vehicles they don't. I've installed a dozen or so this summer and just recently had one that had the hiss. Odd haven't  had a roady xt get the hiss yet, time will tell.