Static Discharge of a Mobile Antenna

Discussion in 'Mobile Radio Systems' started by AA5ET, Mar 12, 2011.

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  1. VU2NAN

    VU2NAN Ham Member QRZ Page

    Hi OM Marco,

    Yes, it is intended that the coil and cap are inside the vehicle to protect them from the elements without undue effort! Will certainly work. Also solves the problem of the coil supporting the whip. And it's highly suited for your ball mount.

    My 5/8λ GP and J-Pole gave comparable results.


  2. WA4OTD

    WA4OTD Ham Member QRZ Page

  3. AA5ET

    AA5ET Ham Member QRZ Page

    I might try a 5/8-wave antenna when I have time to do it. I'll have to find a longer whip since the one I have is already cut too short. The rest I probably have on hand.

  4. K8JD

    K8JD Ham Member QRZ Page

    For performance, a VHF or UHF antenna belongs on the roof of the vehicle. A side mount is going to be rather directional and have much less range than one center-of-roof, mounted..
    I used to grin when I saw 2M, seven foot tall, colinear antennas bumper-mounted. A quarter wave on the roof would get much better range than the expensive high gain colinear mounted like that. I know this from experiments with various antennas and mounts.
    If you only work through a local repeater this is a moot point.
    I went for long haul on simplex channels when I was into VHF FM mobile operation.
    I ran 140 Watts and had my 7 ft colinear on the roof of my station wagon and an Icom transceiver that had a bulletproof , hot, front end in the reciever that would hear weak signals in "intermod alley" in the city..
    I could talk direct from my car as far as some of the local clubs' backyard repeaters could reach !:eek:
    Last edited: Mar 19, 2011
  5. AA5ET

    AA5ET Ham Member QRZ Page

    Yes, I agree. The pattern may be funny with the way I have it mounted, and I won't be doing any "DX" work. But for my purposes the antenna works fine (and I can still drive into a parking garage without removing the antenna ;-) ). And I won't be causing QRM to distant stations.

    For this installation I wanted cheap and easy. Cheap little monobander (FT-1900R), coax, connectors, and antenna materials already installed in the vehicle.

    If I want to work distant stations I'll fire up the HF rig. To me VHF is for short-distance line-of-sight communications. (And we also have a great "Megalink" repeater system here in New Mexico - covers almost the whole state.)

    Last edited: Mar 20, 2011
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