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  1. #1
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    cable tv booster circuit

    plz tell me how to boost up a tv cable signal

    if possible give me a small circuit

    •   Alt18th July 2006, 20:21

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  2. #2
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    how to boost cable tv signal

    Boosting signal in cable TV can be done in the same way as boosting signal from antennas: you need a low-noise, 44-880MHz and at least 15dB gain amplifier ..
    Here is one example:
    http://www.electronics-lab.com/proje...003/index.html

    Regards,
    IanP



  3. #3
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    how to boost cable signal

    Low noise or high power..
    You should first answer this question because of circuit topologies are very different.
    Which band will you use it?? VHF,UHF or both ??

    If you don't know anything about wideband amplifier design, use "ready to use" amplifiers from WJ, Sirenza,RFMD, Anadigics, Mini Circuits etc...

    To implement an very wide band amplifier is quite difficult..



    •   Alt19th July 2006, 22:21

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    cable tv signal noise

    Hi,

    Cable TV signals are usually very strong, I don't understand why you want
    to boost them even more. I would first check all the cables and splitters
    before taking action and replace them with high quality material if necessary.
    A better cable is always better than the best amplifier and a lot cheaper.
    But if you really must, look here: http://www.semiconductors.philips.co...th_edition.pdf
    Download the manual and look at pages 31 and 32.
    Here you will find the right amplifier, the kind of amplifiers cable companies use
    in their networks. They work extremely well, I use them for all sorts of purposes.
    And they are also easy to use: Bolt one to a heatsink, connect the power supply,
    usually 24 V / 500 mA, ( they're hungry as well) , connect input and output cables
    and you are ready to rock & roll. That's it, but it's gonna cost you !
    RF-Parts in the U.S. has some, look at the price and decide.

    on1aag.



    •   Alt20th July 2006, 02:11

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  5. #5
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    boost cable signal

    actually i m using cable in one room

    in other room a low quality picture is obtained without using a wire i.e. through Antena

    i wanted to make the sisnal from cable strong in air

    or the other way is to use a booster at receving antena
    i m prefering receving

    that the signal is catched from antena then boosted up then given to TV

    how about it



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    cabletv signal

    you must check the signal level and the matcing impedence too.
    if not necessary, do not use BALUN.
    YOU MAY USE NORMAL AMPLIFIER CKT. DEPENDING ON FREQUENCY OF OPERATION.



  7. #7
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    tv cable wire and boosted signal

    Quote Originally Posted by hamdard
    you must check the signal level and the matcing impedence too.
    if not necessary, do not use BALUN.
    YOU MAY USE NORMAL AMPLIFIER CKT. DEPENDING ON FREQUENCY OF OPERATION.
    these r the things i m asking my friends(u people) including circuit

    1st one i think would be good enough but if i want to boost signal at receving point
    i mean to boost the signal which is in air



  8. #8
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    cable tv signal booster circuit

    Quote Originally Posted by IanP
    Boosting signal in cable TV can be done in the same way as boosting signal from antennas: you need a low-noise, 44-880MHz and at least 15dB gain amplifier ..
    Here is one example:
    http://h**p://www.electronics-lab.co...003/index.html

    Regards,
    IanP
    That is wideband amplifier for TV antenna. If you feed cable TV signal into that one, you will get one big NOTHING because you will overload the amplifier.

    Added after 3 minutes:

    Quote Originally Posted by ehsanelahimirza
    Quote Originally Posted by hamdard
    you must check the signal level and the matcing impedence too.
    if not necessary, do not use BALUN.
    YOU MAY USE NORMAL AMPLIFIER CKT. DEPENDING ON FREQUENCY OF OPERATION.
    these r the things i m asking my friends(u people) including circuit

    1st one i think would be good enough but if i want to boost signal at receving point
    i mean to boost the signal which is in air
    Then you can use schematic from that link few messages up. But the amplifier must be connected as close as possible to the receiving antenna. If you need to amplify cable TV signal in order to feed two TV sets in your home then you need different amplifier, like that Philips one.



  9. #9
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    bad tv signal level example

    I used a 10db amplifier to boast our cable tv but its marginal and sometimes have bad receive quality.I suspect due to vhf radio nearby.By anychance you know any filter to put it in?



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