Your name or email adress:
Do you already have an account?
Forgot your password?
  • Log in or Sign up


    Use a roof TV antenna as an FM antenna?


    This is a discussion on Use a roof TV antenna as an FM antenna? within the DTV | HDTV Reception and Antenna Discussion forums, part of the Over-the-Air (Antenna TV) category.

    Results 1 to 9 of 9
    1. #1
      DTVUSA Jr. Member
      Join Date
      Dec 2009
      Posts
      7

      Default

      Anybody know if I can somehow use my roof TV antenna as an FM antenna for my tuner? Thanks.

    2. #2
      DTVUSA Member
      Join Date
      Jun 2009
      Location
      Aurora, CO (Denver DMA)
      Posts
      695

      Default



      As long as the antenna was designed to receive TV channels 2 through 6, the answer is probably yes. If the antenna looks anything like this one...

      ... then you're probably all set. It's those long elements toward the back of the boom that do the best job pulling in FM signals.


      On the other hand, if your antenna has any sort of built-in amplifier -- particularly if the works are inside a plastic enclosure, and it needs power from a wall wart to work right -- be aware that many such models also include an "FM trap" designed to reduce interference to TV signals from nearby radio stations. These antennas will still pick up local FM stations, but the trap-and-amp combination can degrade sound quality badly.

    3. #3
      Moderator
      Join Date
      Oct 2009
      Location
      Houston Tx USA
      Posts
      1,025

      Default

      Welcome to the Forum DCO,

      Assuming you've checked your Antenna out as Don has suggested, and IF it will receive FM, then, here's a way to get all that done.

      First of all, not only "should" you be able to receive FM, but HD Radio too.
      It's something that many Audiophiles are really into !

      Anyhow...
      As your cable comes into your HT Area, you can then route it to the...
      Winegard CA-8800 FM Separator
      This gives you a Pass-through for your TV Signals, routing a Coax out of it, and to your FM Receiver.

      Now, if you have a newer Receiver, the Coax will screw right on to the "F" terminal for the Antenna, or, if you have an older Receiver, use a...
      Matching Transformer
      To convert the input to 300 Ohm on the two Terminals.
      You may also need a couple short pieces of Coax to hook it all up.

      Have a good Day !
      S.W.
      Last edited by SWHouston; 12-02-2009 at 02:01 PM.

    4. #4
      Moderator

      Webmaster of EV's Antenna Blog

      Join Date
      Jul 2009
      Location
      Charleston, SC
      Posts
      2,373
      Blog Entries
      1

      Default

      What Don and SWHouston said.

      Be aware that some Combo or VHF Television antennnas are designed to have suck outs or attenuation on FM frequencies....just from the design of the elements on the boom.

      The easiest thing to do is to try the antenna you have and see what you get with an FM Tuner.

    5. #5
      Moderator
      Join Date
      Oct 2009
      Location
      Houston Tx USA
      Posts
      1,025

      Default

      DCO,

      I think what EV meant (and it's a good idea by the way) is to first..

      Get the Coax from your Antenna, directly on your Receiver. Use that Matching Transformer if you have to.

      Then, tune in on something, and see if your Signal Strength jumps up, which it should. If that's the case, then your Antenna will do FM/HDR.

      Have a good Day !
      S.W.

      PS: Sorry to step in on your comment EV,
      but I just didn't think he may have caught what you meant by "try".
      Last edited by SWHouston; 12-02-2009 at 01:56 PM.

    6. #6
      Moderator

      Webmaster of EV's Antenna Blog

      Join Date
      Jul 2009
      Location
      Charleston, SC
      Posts
      2,373
      Blog Entries
      1

      Default

      No worries mate. My communication skills are marginal at best. All help welcome.

    7. #7
      Super Moderator
      Join Date
      May 2009
      Location
      Orange Springs, FL
      Posts
      2,253

      Default

      Quote Originally Posted by EscapeVelocity View Post
      What Don and SWHouston said.

      Be aware that some Combo or VHF Television antennas are designed to have suck outs or attenuation on FM frequencies....just from the design of the elements on the boom.

      The easiest thing to do is to try the antenna you have and see what you get with an FM Tuner.
      Unlikely it will not have some significant performance on FM. It's really hard to build an antenna with the percentage bandwidth to cover low band TV and have it stop at FM frequencies.

      It may approach or be slightly below unity but the fact it's on the roof, it will pick up a lot of signals not available inside an dwelling.
      The more I understand, the less I know.

      PORK... The Other White Meat....

    8. #8
      Contributor
      Join Date
      Oct 2009
      Posts
      325

      Default

      I believe he was referring to the FM stubs used on some antennas. They are of the proper length to represent a short-circuit at the FM band.

      Think of them as a passive FM filter that is part of the antenna. I have 20-year old Radio Shack antenna that has these stubs that can be rotated to either permit or to kill FM.

    9. #9
      Super Moderator
      Join Date
      May 2009
      Location
      Orange Springs, FL
      Posts
      2,253

      Default

      Quote Originally Posted by ProjectSHO89 View Post
      I believe he was referring to the FM stubs used on some antennas. They are of the proper length to represent a short-circuit at the FM band.

      Think of them as a passive FM filter that is part of the antenna. I have 20-year old Radio Shack antenna that has these stubs that can be rotated to either permit or to kill FM.
      interesting, never seen one.
      The more I understand, the less I know.

      PORK... The Other White Meat....

     

    Related Topics and Posts

    1. This Old House installs roof antenna
      By Tim58hsv in forum DTV | HDTV Reception and Antenna Discussion
      Replies: 24
      Last Post: 03-30-2011, 01:23 AM
    2. What outdoor roof antenna should I be looking for?
      By firsttimothy67 in forum DTV | HDTV Reception and Antenna Discussion
      Replies: 19
      Last Post: 11-18-2010, 12:43 PM
    3. This Old House installs roof antenna
      By Tim58hsv in forum PBS
      Replies: 20
      Last Post: 12-28-2009, 03:18 PM
    4. Question: How far away from a power line does a roof top antenna have to be?
      By RRO in forum DTV | HDTV Reception and Antenna Discussion
      Replies: 10
      Last Post: 12-21-2009, 09:28 PM
    5. New roof -- new attic antenna?
      By dgs in forum DTV | HDTV Reception and Antenna Discussion
      Replies: 25
      Last Post: 10-29-2009, 01:13 PM

    Quick Reply Quick Reply


    Click here to log in

    What state is the city of Los Angeles located in? (Answer this question correctly, it is used to stop spammers)

    Tags for this Thread

    Share this Post

    Join DTVUSAForum

    The leading television and technology community discussion site, join today!

    DTV USA Forum is the best source of television
    and technology troubleshooting advice from a community of experts and members.

    Back to top