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3 EASY ANTENNAS FOR BEGINNERS

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  • dudesjp
    replied
    Originally posted by F-EGLF1 View Post
    For the FR24 box I use the supplied coax (H-155 I think), for my PlanePlotter box and my OGN receiver I use 10 meters of LMR-400 with N connectors at the antenna end and short N to MCX pigtails to the dongles.
    Found the LMR-400 by US$10,00/meter! OMG! This one is much much much much better?

    Leave a comment:


  • Patrick Reeves
    replied
    I don't mind spending a little more for higher quality low-loss cable runs. Others here may differ, but everyone has their own philosophy...

    Leave a comment:


  • F-EGLF1
    replied
    For the FR24 box I use the supplied coax (H-155 I think), for my PlanePlotter box and my OGN receiver I use 10 meters of LMR-400 with N connectors at the antenna end and short N to MCX pigtails to the dongles.

    Leave a comment:


  • dudesjp
    replied
    Originally posted by Patrick Reeves View Post
    I use the supplied Bieffe CO 100 AF coax for the FR24 box, and Belkin RG58 on an Airspy SDR for messing around on the lower bands. Have not been disappointed... I guess RG6 would work, IMO CO 100 or RG58 would be better.
    Good to know! RG6 or RG59 are much worst than the RG58? Because the price diference here is huge! Like the RG6 or RG59 cost R$1,20/meter - about US$0.29/meter - and the RG58 are R$3,86/meter - about US$0.96 - plus the conector that are different, I'll spend much more, so, worth it? Thank you

    Leave a comment:


  • Patrick Reeves
    replied
    I use the supplied Bieffe CO 100 AF coax for the FR24 box, and Belkin RG58 on an Airspy SDR for messing around on the lower bands. Have not been disappointed... I guess RG6 would work, IMO CO 100 or RG58 would be better.

    Leave a comment:


  • dudesjp
    replied
    Originally posted by Velivole View Post
    Hi,
    your amplifier is designed to be used for Satellite-Receivers for your home-TV.
    Those receivers are feeding the powersupply (I think about 15 to 18 Volts but please check the voltage because I do not have one) through the coaxial cable to the amplifier, hence the mention "don't need power".
    That means you may need also 1) An suitable powersupply 2) A power Injector and 3) A DC Blocker
    Hey Velivole, thank you for the explanation! I have here a power injector that the guy from the satellite tv gave but I'm afraid about the current! Not even in the webpage says about this!

    Originally posted by Patrick Reeves View Post
    The amp you have- like trying to fit a square peg in a round hole, IMO.

    E-bay has a boatload of ~1000 MHZ 50 ohm amps, I've been looking at this one for my own project:

    http://www.ebay.com/itm/new-20MHz-2-...3D321924700172

    Plus 3 VDC power supply, injector, blocker, probably $30-40 all in.
    Really liked this one! But unfortunately the seller don't send to Brazil! And wich coaxial cable are you using? RG6 with 65% it's a good one?

    Leave a comment:


  • Patrick Reeves
    replied
    The amp you have- like trying to fit a square peg in a round hole, IMO.

    E-bay has a boatload of ~1000 MHZ 50 ohm amps, I've been looking at this one for my own project:

    http://www.ebay.com/itm/new-20MHz-2-...3D321924700172

    Plus 3 VDC power supply, injector, blocker, probably $30-40 all in.

    Leave a comment:


  • Velivole
    replied
    Your amplifier DOES need power

    Originally posted by dudesjp View Post
    Hey F-EGLF1, well, the seller said that this one don't need power supply! Maybe this? In the box have just this informations:

    Technical specifications

    - Line amplifier
    - Gain = 20dB
    - Frequency: 950MHz - 2150MHz
    - Return loss : 18dB
    - Noise figure : 3,5dB
    - Impedance : 75 ohms

    What can be? Thank you
    Hi,
    your amplifier is designed to be used for Satellite-Receivers for your home-TV.
    Those receivers are feeding the powersupply (I think about 15 to 18 Volts but please check the voltage because I do not have one) through the coaxial cable to the amplifier, hence the mention "don't need power".
    That means you may need also 1) An suitable powersupply 2) A power Injector and 3) A DC Blocker

    Leave a comment:


  • dudesjp
    replied
    Originally posted by Patrick Reeves View Post
    Impedance mismatch? You have a 50 ohm system going through an LNA rated at 75 ohms.
    Hey Patrick! Didn't thought in this! So, buy a new one maybe? Or there's a way to change the impedance? Thank you

    Leave a comment:


  • Patrick Reeves
    replied
    Originally posted by dudesjp View Post
    Hey F-EGLF1, well, the seller said that this one don't need power supply! Maybe this? In the box have just this informations:

    Technical specifications

    - Line amplifier
    - Gain = 20dB
    - Frequency: 950MHz - 2150MHz
    - Return loss : 18dB
    - Noise figure : 3,5dB
    - Impedance : 75 ohms

    What can be? Thank you
    Impedance mismatch? You have a 50 ohm system going through an LNA rated at 75 ohms.

    Leave a comment:


  • dudesjp
    replied
    Originally posted by F-EGLF1 View Post
    What power supply and bias-t are you using to power it, and depending on the antenna you are using you may need a DC blocker between it and the antenna.
    Hey F-EGLF1, well, the seller said that this one don't need power supply! Maybe this? In the box have just this informations:

    Technical specifications

    - Line amplifier
    - Gain = 20dB
    - Frequency: 950MHz - 2150MHz
    - Return loss : 18dB
    - Noise figure : 3,5dB
    - Impedance : 75 ohms

    What can be? Thank you

    Leave a comment:


  • F-EGLF1
    replied
    What power supply and bias-t are you using to power it, and depending on the antenna you are using you may need a DC blocker between it and the antenna.

    Originally posted by dudesjp View Post
    And i'm back! Today arrived my line amplifier! And when I put him in the line to test, what happened? Nothing! I loose all the planes! I tried another cable, another conectors but nothing!

    [ATTACH=CONFIG]7046[/ATTACH]

    As you can see in the photo, says that give 20dB gain and operate in the range between 950 and 2150 MHz! Tried to reverse the sides, but nothing too! Any Ideas? Thank you!

    Leave a comment:


  • dudesjp
    replied
    And i'm back! Today arrived my line amplifier! And when I put him in the line to test, what happened? Nothing! I loose all the planes! I tried another cable, another conectors but nothing!

    AmeOVbr2LSHTMxdZyzMEbV2ExBzHUnBOMPFs3O7WuArM.jpg

    As you can see in the photo, says that give 20dB gain and operate in the range between 950 and 2150 MHz! Tried to reverse the sides, but nothing too! Any Ideas? Thank you!

    Leave a comment:


  • dudesjp
    replied
    Originally posted by K5TED View Post
    You won't lose any substantial amount of signal with 1m of good quality coax. If that's the best option to protect or facilitate the installation, then it will be fine.
    Good to know! It's the "easy" way i think, since the antenna fit almost exactly in the case! Let's see tomorrow

    Leave a comment:


  • K5TED
    replied
    Originally posted by dudesjp View Post
    Hey everyone! This is my CanTenna! Made with a Monster Energy Drink Can and plastic rice jar!

    [ATTACH=CONFIG]7042[/ATTACH]

    I'll put this state of art in the roof with 10 meters coaxial cable, and I bought an amplifier for compensate the loss of signal. But, after seeing the projects, i realized that everyone put the amplifier inside the can right? So, if i put the amplifier in the line, like 1 meter after the antenna, i'll lose something or will be the same? Because as i'll put outside, i thought in put the amplifier right after the hole in the wall, but inside the roof, in the attic! It's ok, or is better put inside the can? Thank you
    You won't lose any substantial amount of signal with 1m of good quality coax. If that's the best option to protect or facilitate the installation, then it will be fine.

    Leave a comment:

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