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Old 12-28-2006, 07:49 AM   #1
Vismich
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Default FM Transmitter HELP!

I'm not 100% certain how the FM transmitter works, but I can't get clear reseption on my wife's Jeep Cherokee.

The strange thing is that her Ipod also has the same problem. Someone told me that Jeep insulates there window with some sort of Metalic gel that prevents an FM Transmitter signal from clearly getting to teh Antena outside of the car...This was for the Ipod.

I figured this wouldnt hold true for the Sirius because both Antena's are outside....Unless the transmitter is in the head unit itself.

First, has anyone ever heard of this problem?

Second, what do I do to resolve it?
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Old 12-28-2006, 08:58 AM   #2
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I can't be much help here except to tell you that the transmitter is in the receiver itself, so if you have a problem getting a signal through the glass (?) it would be the same with Sirius as it would be with the iPod.

What kind of reception are you getting?
You might need to simply find a more appropriate channel to broadcast on.
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Old 12-28-2006, 09:08 AM   #3
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The FM transmitter resides in the head unit. Sirius signal comes down, hits the Sirius antenna, goes to the head unit, and is transmitted from the unit at a certain FM frequency. The older units you can actually hear in other cars due to a strong signal, but recently the FCC has dummied it down.

The solution to your problem is a "Wired FM Modulation Relay" which you can get online:

http://www.directed.com/audio/sirius...s.asp#ca_fmMod

or at Best Buy (I know mine had it).



It's kind of hard to tell in that picture, so I scanned a page of a small pamphlet that was included with my S50.



This would definitely help your problems, but Scipione has an idea. Before you go pay $20 bucks, try that
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Old 12-28-2006, 09:37 AM   #4
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I have tried a number of stations....They all sound like crap. They are static at best. I had XM and I have never had this issue...Then again, I never had it in thge Jeep.
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Old 12-28-2006, 10:29 AM   #5
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Quote:
Originally Posted by Vismich
I have tried a number of stations....They all sound like crap. They are static at best. I had XM and I have never had this issue...Then again, I never had it in thge Jeep.
This isn't a Sirius/XM problem.. The FCC made both companies cut back on the FM transmitter power last summer.. Up until then, the power levels were illegal under the long time Part15 rules. All radios (FM or Sirus) built since last summer are in the same boat.. If you go over to www.xm411.com, you'll see the same FM transmitter complaints.
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Old 12-28-2006, 10:44 AM   #6
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I too picked up the "Wired FM Modulator Relay" from Best Buy...though mine was $30. Gotta say though, it's the best $30 I've spent in a while. I've only had Sirius for a few days, and while the FM Transmitter was better than I figured it'd be, the slight static and channel changing on longer drives was starting to bother me. I have an '03 Ford Ranger, with an aftermarket Sony radio. My only issue was that I didn't have the Sony tool to remove the radio. A quick trip to my friend's auto detailing/upgrading shop got the radio removed (free of charge ) It then took about 5 seconds to install the relay and start enjoying static-free sirius. Seriously, as long as you can access the rear of your unit, the relay is an excellent idea and very easy to install.
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Old 01-01-2007, 01:43 PM   #7
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Default FM Transmission Solution

After struggling with similar problems, and reading these threads, I went to BestBuy and picked up the FM Modulator (Switch) for about $30. But before I opened it up, I decided to do the simple antenna wire from the FM Out jack with 2.5 mm connector from Radio Shack (read about this in some other posts). It cost me $2.99. I cut the antenna wire to about 33.5 inches which is about 1/4 wavelength at the low end of the FM band (88 MHz).

It worked like a jem. I can even use a frequency with a strong signal in my area, and still dominate my car stereo with the FM transmission from my Starmate 4.

I'm using the window suction cup mount near the top of my windshield, and I was able to just tuck the FM wire antenna under the roof material near the top, in the direction of my vehicle (Chevy Silverado) antenna.

I'm going back to BestBuy tomorrow to get a refund on the FM Modulator/Switch.

Good Luck! Bob
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Old 01-02-2007, 04:34 AM   #8
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Quote:
Originally Posted by robertman
After struggling with similar problems, and reading these threads, I went to BestBuy and picked up the FM Modulator (Switch) for about $30. But before I opened it up, I decided to do the simple antenna wire from the FM Out jack with 2.5 mm connector from Radio Shack (read about this in some other posts). It cost me $2.99. I cut the antenna wire to about 33.5 inches which is about 1/4 wavelength at the low end of the FM band (88 MHz).

It worked like a jem. I can even use a frequency with a strong signal in my area, and still dominate my car stereo with the FM transmission from my Starmate 4.

I'm using the window suction cup mount near the top of my windshield, and I was able to just tuck the FM wire antenna under the roof material near the top, in the direction of my vehicle (Chevy Silverado) antenna.

I'm going back to BestBuy tomorrow to get a refund on the FM Modulator/Switch.

Good Luck! Bob
Okay, this is interesting! Can you explain this a little more? I don't get the "simple antenna wire from the FM out jack with the 2.5mm connector from Radio Shack".
Or maybe you could link to the other threads you mentioned..
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Old 01-02-2007, 04:53 AM   #9
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He made a 1/4 wave length radio antenna and plugged it in to the FM out jack.

That is a good idea!!

Joe
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