Multiple signal boosters


This is a discussion on Multiple signal boosters within the DTV | HDTV Reception and Antenna Discussion forums, part of the Over-the-Air (Antenna TV) category.

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  1. #1
    DTVUSA Jr. Member
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    Default Multiple signal boosters

    This may be a dumb question, but is it possible to put 2 signal boosters on one antenna line to improve the signal strength?

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    Moderator dkreichen1968's Avatar
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    Quote Originally Posted by cbird View Post
    This may be a dumb question, but is it possible to put 2 signal boosters on one antenna line to improve the signal strength?
    Possible, yes. Practicle, maybe not. Everytime you use an amplifier it adds noise to the signal, which effectively can be subtracted from the gain. It's also distorting the signal so that it may become unusable. If you're not careful you can also over amplifiy and overload your TV tuners.
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    The reason I asked is because I just recently got tivo which has a signal strength meter(something my Vizio tv doesn't have) so I never knew my signal strength until now. I have 2 channels that are at 63% and the rest are in the 40's. With my location I can't get in better than that. So I thought about trying multiple signal boosters. Since my signals are not very strong my thinking is it won't overload my tuner. Unless the power of the boosters is what would overload the tuner and not the signal strength.

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    Moderator dkreichen1968's Avatar
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    Those signal strength meters really don't measure signal strength, they measure signal quality. If you're not getting break ups on your TV or TiVo don't worry about it. There is very little chance that it would improve the number of stations received since it will add more distortion to already weak signals.

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    OK thanks for the help.

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    Two boosters in series won't help. It will in fact hurt.

    Noise isn't really what you're worried about so much. What will happen is that the boosters in series will overload your TV's front end, or overload each other. Probably to the point where they start throwing all sorts of dirty signals all over the place.

    If you have an extremely long cable run like 200ft or so you may be able to use two amps but you should use one amp up by the antenna (masthead) and another in your house (distribution). That is actually the setup I have. The longest cable from antenna to TV in my house is about 300-350ft. I use RG11 from the top of the tower to the house.

    But back to your original question, you can't just boost nonexistent signals. You need to have something to work with.
    dkreichen1968 likes this.
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