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Evology LMDTV04 Antenna: Weak DVB-T Signal in Bydgoszcz Fordon, 11-12 km from RTCN Trzeciewiec

bartass4 6753 10
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How can I improve DVB-T signal quality when an amplified Evology LMDTV04 antenna shows strong signal strength but unstable signal quality near the Trzeciewiec transmitter?

Replace the amplified antenna with a passive, low-gain one, remove the power adapter/separator, and mount the antenna elements horizontally, because Trzeciewiec MUX 1, 2, 3 and 8 are transmitted in horizontal polarization and the current setup is likely clipping from an overly strong signal [#16280790] Simply turning off power to the amplifier is not enough, because an unpowered amplifier still introduces strong attenuation [#16280790] In Fordon, a low-gain antenna is preferred for such a strong nearby transmitter, and an attenuator/silencer may still be needed if the signal remains too strong [#16282370] One user reported that after switching to an ordinary passive antenna, the channels were received immediately and the quality stopped jumping [#16283393]
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  • #1 16280703
    bartass4
    Level 9  
    Posts: 8
    Hello, I have a problem with high-quality DVB-T signal. I bought an Evology lmdtv04 antenna with power supply and antenna separator, outdoor / indoor, VHF / UHF reception range. The antenna is mounted on the balcony railing (second floor of the block) in the direction of RTCN Trzeciewiec, my location is Bydgoszcz Fordon, the distance from the transmitter in a straight line is approx. 11-12 km and I have a problem with the signal quality, so the TV detects MUX1,2,3,8 but there is a weak jumping signal. Signal strength within 90%. The antenna is connected directly to the separator and the original one to the TV with the attached cable. Anyone have any idea how to improve signal quality? cable fault?
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    • Evology LMDTV04 Antenna: Weak DVB-T Signal in Bydgoszcz Fordon, 11-12 km from RTCN Trzeciewiec separator.jpg (10.08 KB) You must be logged in to download this attachment.
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    #2 16280790
    irekr
    VIP Meritorious for electroda.pl  
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    Change the antenna to passive, without amplifier. And without a power adapter. What you are describing is a clear example of total clipping with too strong a signal.

    Note: Turning off the power to the amplifier mounted near the antenna is not a solution. The unpowered amplifier introduces strong damping ...

    For this the way of mounting this "fin". Standing vertically, it will receive signals in vertical polarization, while in Trzeciewiec MUXs 1, 2, 3 and 8 are transmitted in horizontal polarization, ie the 'fin' must be placed 'flat', like a fish fillet in a pan.
  • #3 16280840
    bartass4
    Level 9  
    Posts: 8
    you can rotate it to horizontal polarization, I understand that the signal strength from Trzeciewiec is quite strong and the amplifier is not needed? and how would I connect the cable directly to the TV, not through a separator, the signal will not be distorted?
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  • #4 16281003
    LeDy
    Level 43  
    Posts: 19127
    Help: 1992
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    bartass4 wrote:
    you can rotate it to horizontal polarization, I understand that the signal strength from Trzeciewiec is quite strong and the amplifier is not needed? and how would I connect the cable directly to the TV, not through a separator, the signal will not be distorted?

    There is to be a balun in the antenna and without a power supply and separator. Plain metal antenna plug, shielded.
  • #5 16281144
    irekr
    VIP Meritorious for electroda.pl  
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    It will be a bit difficult to attach a balun to this antenna, because it is an antenna ... unbalanced. This "antenna-like" product comes in many embodiments, and most often the antenna amplifier is an integral part of the sheet / laminate piece with the foil. I used to do such an "antenna" at my Slovak friend, because he had a similar problem with the transmitter standing "a stone's throw".
    If you are stubborn, you can omit this amplifier and all you need is a knife and a soldering iron. You can't put these "miracles" in the store ..?
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  • #6 16281836
    bartass4
    Level 9  
    Posts: 8
    give back only what passive antenna to choose?
  • #7 16282195
    Darek.S
    Level 34  
    Posts: 6738
    Help: 216
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    bartass4 wrote:
    which passive antenna to choose?

    Evology LMDTV04 Antenna: Weak DVB-T Signal in Bydgoszcz Fordon, 11-12 km from RTCN Trzeciewiec
    or weaker
    Evology LMDTV04 Antenna: Weak DVB-T Signal in Bydgoszcz Fordon, 11-12 km from RTCN Trzeciewiec
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  • Horizontally polarized low-gain antenna recommended for Trzeciewiec

    #8 16282370
    irekr
    VIP Meritorious for electroda.pl  
    Posts: 9687
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    Due to the horizontal polarization of all MUX1,2, 3 and 8 TV signals, the one from the bottom photo will be optimal, but in the "flat" version, without the vertically bent VHF elements. Dipol used to offer something similar to MLOG 6-60, but I haven't seen it lately.
    The antenna has a low gain, which is its advantage with very strong signals in Fordon. You may need to use a silencer. After all, Trzeciewiec is visible to the naked eye ...
  • #9 16283393
    bartass4
    Level 9  
    Posts: 8
    I bought a new antenna, it works flawlessly, she immediately caught the channels that were already set on the TV, you can see a little weaker signal strength, but at least the signal quality does not jump. Thanks for the advice.
  • #10 16283854
    Darek.S
    Level 34  
    Posts: 6738
    Help: 216
    Rate: 979
    bartass4 wrote:
    i bought a new antenna

    For the sake of order, show your yak and shut up
  • #11 16286772
    bartass4
    Level 9  
    Posts: 8
    I took a risk and bought an ordinary antenna from a supermarket, it works fine.
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Topic summary

LABEL_AI_GENERATED
The discussion revolves around issues with the Evology LMDTV04 antenna, which is experiencing weak DVB-T signal reception in Bydgoszcz Fordon, approximately 11-12 km from the RTCN Trzeciewiec transmitter. Users suggest that the problem may stem from the antenna's amplifier, recommending a switch to a passive antenna to avoid signal clipping due to excessive amplification. It is advised to mount the antenna in a horizontal position to align with the horizontal polarization of the transmitted MUX signals. Some users successfully resolved their issues by purchasing different antennas, which improved signal quality and stability.
AI summary based on the discussion. May contain errors.
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