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Car antenna adjustment

Discussion in 'Radio and Communications' started by lhtphoto, Jul 12, 2010.

  1. lhtphoto

    lhtphoto New Member

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    I have a 2008 SUbaru Outback wagon with the antenna built into the rear window. I need to "trim" the antenna at the radio to get a better signal. Does anyone know where the trimmer control is on the OEM radio/cd player?
     
  2. ermine

    ermine New Member

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    didn't this just apply to AM days? The antenna was such a short length compared to the signal wavelength that you'd peak the aerial with a trimmer capacitor. Haven't seen that sort of thechnology for years. This thread has more about aerial trimming on car radios, sounds like its for old-timers only ;)
     
  3. lhtphoto

    lhtphoto New Member

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    I guess I'm an old timer but I do remember that FM segments at one time also had an antenna adjustment. The problem with the glass mounted antennas is that they can not be lengthened to assist with the lower end of the FM band.
     
  4. dave

    Dave New Member

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  5. g1pgi

    g1pgi New Member

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    if you look at the rear of the radio where the antenna connector plugs in you will see a small hole,this probably the antenna trimmer for the radio there should be a small slot visable,be very carefull adjusting the trimmer it is easily broken,a very small insulated screwdriver or better a small plastic rod with a filed flat end like a flat blade screwdriver,the trimmer is best adjusted at the high end of the AM band close to 1.5mhz(or 200Mtrs if your slightly older!!).
     
  6. lhtphoto

    lhtphoto New Member

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    Antenna trimming

    Thbanks for the input. I appreciate your help
     
  7. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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    Bear in mind that the trimmer is for AM only, and not for FM.

    It also may well do nothing anyway, cars which use the crappy rear window as an aerial usually have an in-line ampliifer to try and make it work acceptably.
     
  8. RadioRon

    RadioRon Well-Known Member

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    Sometimes the trimmer is accessible through the front by way of the door where your CD or tape inserts into the player.
     

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