Re: OT Radio antenna (John T)

Posted by MarkB_MI on October 09, 2006 at 03:50:00 from (64.31.11.153):

In Reply to: Re: OT Radio antenna (John T) posted by BUDD on October 08, 2006 at 16:53:13:

You have been witholding information! You didn't say this is a automobile radio, let alone that you needed to disable your external antenna so you can receive your XM receiver's FM output.

Here is what I think your problem is: A car radio relies on the external antenna, and it uses a shielded cable to cut out interference from various sources in the car. So when you disconnect your antenna, you're attenuating both the broadcast signals and your FM receiver's output.

I would try to make up a dedicated antenna for the XM radio. You could make one up from a piece of cable from a car antenna; just strip off the shielding. This antenna would be inside the vehicle, preferably right next to the XM receiver. Ideally, if you can easily get to the back of your FM radio, I would just unplug the exterior antenna and plug in the interior (XM) antenna. You can get short antenna cable extensions to make that easier. Don't use a switch if you can help it; as you've seen they don't work well and will attenuate your signal due to impedance mismatch.

Good luck, let us know how it goes.

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