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Thread: 2 meter beam

  1. #1

    Default 2 meter beam

    I have a 2 meter beam I had it about 20 ft in the air hit the repeater but not great put it up to about 40 ft now it's a little worse what could be wrong I what should I do

  2. #2

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    How did you extend the co-ax? A complete new length or just added another 20 foot or so with connectors? If the latter then it could be the additional connector - probably so PL259/SO239 combo or 2x PL259 and barrel adapter: either way "UHF" connectors are not very good for even for VHF. What co-ax do you use?

  3. #3
    Code Monkey 2e0sql's Avatar
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    What style of coax? what's the polarity of the beam?
    Peter, 2E0SQL - http://www.2e0sql.co.uk

  4. #4

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    I am using a length of R213 the beam is a vertical beam

  5. #5

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    Beam is a vertical beam

  6. #6
    Code Monkey 2e0sql's Avatar
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    Adding height to the beam also adds losses by adding more cable so that could have caused the signals to go weaker.
    Peter, 2E0SQL - http://www.2e0sql.co.uk

  7. #7

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    I also was wondering where I have it on a metal mast

  8. #8

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    I am thinking it better for me to go with a vertical antenna

  9. #9
    Code Monkey 2e0sql's Avatar
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    Bonus of the vertical antenna is that you won't need a rotator to point it at the repeater you want to operate via, but at the same time you lose the extra directionality and gain.
    Peter, 2E0SQL - http://www.2e0sql.co.uk

  10. #10

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    RG213 has an attenuation of of 2.1 dB per 100 feet at 100 MHz and 4.8 dB per at 400 MHz. 3 dB would be a 50% reduction in power.

    Also, what are you using as a reference point, a local repeater? Is the beam pointing exactly in the same direction as before?

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