Using a satellite dish to make a HD parabolic antenna? Worth it?

Discussion in 'Digital Over the Air Television Talk By RabbitEars' started by ken2400, Apr 5, 2008.

  1. ken2400

    ken2400 Thread Starter Active SatelliteGuys Member

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    I have a number of 18" dishs setting around and was wondering if it was worth trying to convert one or more into a UHF HD antenna?

    Should I look for a 30+" instead?
    Should I just use a large corner UHF antenna?

    Also I have a large UHF/VHF antenna. What would cutting off the VHF do for the signal?

    Thanks
     
    #1
  2. Jim5506

    Jim5506 SatelliteGuys Family
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    Just place the active element at the focus of the parabola.

    It might be best to use a Dish500 since its focus is along a line from each lnb to the other - would focus signal on the driven element better.

    It is probably not worth the effort since better antennas are not very expensive.
     
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  3. nsaspook

    nsaspook PIT MEMBER

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    This is the size for a UHF dish reflector with good gain SPS-40.
    [​IMG]
    400-450 mhz band.
    sps-40_drawing

    Stick with a normal TV antenna.
     
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  4. Nevyn

    Nevyn New Member

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    Come on now, how cool would it be to have one or two of those behemoths up on the roof spinning round? :p
     
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  5. ciwsguy

    ciwsguy Member

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    :D:D Well, those who know how crummy the SPS-40 video was would know better than to waste the money building a structure to support it. But it would be a VERY GOOD WAY to thumb your nose at those neighbors who complain about "no antennas" and cite those archaic, illegal HOA rules. It might be worth the hassle, don't you think?:D
     
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  6. dodge

    dodge Active SatelliteGuys Member

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    Just put up a winegard hd8200p, that will really piss the neighbors off that antenna is 17' long.
     
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  7. NightHawk

    NightHawk PIT MEMBER

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    18 inches is far too small for an effective UHF antenna. Probably less than 3 dB effective gain at 500 MHz. At 30 inches your still only around 10 dBi and below that of a good log periodic.
     
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  8. Smith P.

    Smith P. On Vacation

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    Terk T-55 is pretty good one if you live in multi directional environment.
     
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  9. ciwsguy

    ciwsguy Member

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    Dodge, you apparently don't know how big the SPS-40 antenna is. It dwarfs the HD8200p. SPS40 would definitely PO the neighbors much more. But it would also exceed the 1meter dish limit size.:D
     
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  10. dish_in_the_sky

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    Anybody got a crane????

    You'll need one to install it!

    And a VERY beefy roof!:D
     
    #10
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