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Joris -  
Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   -
Hello, I am a new tenant in a small house, I have a bakery TV with built-in TNT, a rooftop antenna, and an amplifier I believe, in my cabinet next to the electric meter. I connect my antenna cable to the antenna socket, I start a channel search and I find nothing, I can't find any channels, everything was working fine for the previous tenant.
Could you help me?

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13 answers

  1.
    Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204
     
    Be careful with the power supply because yours is 24 volts and if your friend's preamp is 12, it's going to smoke!
    Some DIY stores operate as a drive-through and you can also order online

    --
    I call a spade a spade *
         *in French in the text
    1
    1. Joris
       
      I will pay attention to his diet.
      0
  2. christ1745 Posted messages 94 Registration date   Status Member Last intervention   44
     
    Good evening

    Did you select the correct input source on your TV before searching?
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    1. Joris
       
      I tried digital and analog antennas in research.
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  3. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204
     
    Hello,
    Is the preamp well powered?

    --
    I call a spade a spade *
         *in French in the text
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    1. Joris
       
      Hello, yes I think so because it has a little green light and I checked the power supply.
      0
  4. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204
     
    Damn it... Start by checking the coaxial connections, unplugging and replugging them several times to eliminate any possible oxidation; if necessary, redo them neatly and be careful, even the slightest "hair" from the braid touching the copper core can mess things up...

    --
    I call a spade a spade *
    *in French in the text
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    1. Joris
       
      I have already rechecked the connections, bought a new cable, no hair is touching the copper, I even trimmed the ends of my antenna cables.
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  6. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204
     
    I will suspect the preamplifier... if you need to change it, the best would be to place a variable gain preamplifier (sometimes too much amplification can degrade the signal), this preamplifier should be LTE/4G filtered and placed as close to the antenna as possible.
    Here is a good product, for example:
    https://www.ebay.fr/itm/Amplificateur-TNT-complet-JOHANSSON-exterieur-interieur-KIT-7328-fiches-F-/261244510074?hash=item3cd362df7a%3Ag%3Ac0gAAOxy6%7EBR3uv8

    --
    I call a spade a spade *
    *in French in the text
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    1. Joris
       
      Could it be because of that? Because he doesn't seem old to me or even in bad working condition.
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  7. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204
     
    It's a guess... and unfortunately, I can't tell you more.
    Can you remove the preamp and its power supply and try making a direct connection to the antenna?

    --
    I call a spade a spade *
         *in French in the text
    0
    1. Joris
       
      It is powered by an electrical outlet on the meter panel
      How can I connect it directly?
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    2. Joris
       
      Oh no, I read it wrong; do I connect directly from the cable that goes to the OUT DC ANT connection of the preamplifier?
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  8. nadellen Posted messages 11941 Registration date   Status Member Last intervention   7 353
     
    Hello
    just to clarify
    one end of the coaxial cable is on your panel, but the other end is indeed on the TV?
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  9. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204
     
    I meant to say to make a direct connection to the antenna, without the preamp.
    Are you sure that what is in your table is a preamp or a power supply because OUT DC ANT means output powered in direct current (DC) to the antenna, the preamp itself would actually be on the mast
    Describe this box well and the connectors and labels

    --
    I call a spade a spade *
    *in French in the text
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    1. Joris
       
      The box that is in my dashboard?
      Or the one for the antenna?
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      1. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204 > Joris
         
        Yes yes yes, and there is another one outside, on the mast?
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      2. Joris > Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention  
         
        Yes, a white box with a cable connected to the antenna and another that needs to go down into the attic to presumably connect to the TV outlet I have on the wall.
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  10. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204
     
    The diagram is essentially as follows:
    Antenna -> cable to the preamp output of the mast -> cable from the preamp input to the power supply on OUT DC ANT -> power supply output to wall socket(s) and you didn't tell us what was written on the sockets of that damn box

    I call a spade a spade *
         *in French in the text
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    1. Joris
       
      So on this damn box, I have a typical power socket, two TV sockets, one of which is connected, and this famous OUT DC ANT socket; it's a Fracarro brand box.
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  11. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204
     
    So this is it:
    https://www.rexel.fr/frx/Cat%C3%A9gorie/S%C3%A9curit%C3%A9-et-communication/Antenne/Ampli-repartiteur-fiche/Alimentation-24V-100MA--2S/PORPSU342/p/61749158

    I call a spade a spade *
         *in French in the text
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    1. Joris
       
      Exactly that, I just found the manual.
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    2. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204
       
      And so I confirm that it is indeed a power supply for a preamp that should be on the mat.
      Therefore, the OUT DC ANT socket must be connected to the cable that goes up to the attic, all with F-type connectors that are mounted as follows:
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      1. Joris > Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention  
         
        Yes, it has gone up like this
        so do you have any idea what I can do?
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  12. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204
     
    If your connections are correct, as I said at the beginning, I wonder if the preamp is not defective, and I recommended a product, but if you can, try connecting the antenna directly to the TV by removing the power supply and the preamp with female F connectors:

    --
    I call a cat a cat *
         *in French in the text
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    1. Joris
       
      I don't have a female connector and with the lockdown, it's hard to go looking for one. It seems that a friend of mine has a new preamp that he hasn't used, so I'll try that instead.
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    2. Joris
       
      Good evening, would it be possible for it to be a special channel? Because the previous tenant left not long ago and I became a tenant 1 or 2 weeks after him, so could it be that this damn box has been released in the meantime?
      Thank you
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  13. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204
     
    No, with a rooftop antenna there are the 27 classic terrestrial DTT channels (digital search) and yes, this preamplifier may have failed

    --
    I call a spade a spade *
    *in French in the text
    0
  14. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 204
     
    We're going to make it...
    So the OUT DC ANT connection must be connected to the cable going to the attic, and there are thus two TV outputs, but only one is connected.
    Can you read the complete reference for this thing that should actually be a power supply?

    --
    I call a spade a spade *
    *in French in the text
    -1
    1. Joris
       
      Fracarro PSU342
      Code : 289 564
      220-240v 50-60Hz
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