2 Way Radios that Actually Transmit Two or More Miles. - Page 2
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Thread: 2 Way Radios that Actually Transmit Two or More Miles.



  1. #11
    Marlin Marksman
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    Using hand held you can do very well with Larson or Centurion telescoping half-have antenna, with radio held vertically at face level, not using a hand mic with the radio in your belt. Makes BIG difference! Full-sized quarter-wave whip with a counterpoise wire attached to shield of connector almost as good. Flexible helical antenna which comes with the portable is a VERY poor radiator, typically NEGATIVE 5db gain compared to an isotropic source. With a 2watt radio and unity gain antenna, such as 1/4 wave with a ground plane or counterpoise, or half-wave without a ground plane, two miles is reality in open, level terrain. Using the helical "rubber duckie" that comes with the radio effective radiated power is only about 400 milliwatts and range about 1/2 mile at best.

    Antenna isn't everything, it is the ONLY thing which matters.

    When we ran comms for SAR the COML carried an 8db, 3-element yagi antenna on a full wavelength 70cm boom, on a telescoping pole to that it could be elevated and aimed directly at portable repeater placed at ridgeline on forest service access road. We could maintain contact with the VAEOC in Richmond, 100 miles away by using the 2w handheld with portable yagi to hit repeater on Reddish Knob 20 miles away. We could also maintain simplex contacts without using the repeater, for 5 miles aiming the yagi at the locations we wanted to reach.
    Last edited by Outpost75; 08-26-2017 at 08:32 PM.
    scorpio likes this.
    The ENEMY Is Listening
    HE wants to know what YOU know.
    Keep it to yourself.

  2. #12
    Marlin Marksman
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    Quote Originally Posted by scorpio View Post
    I think I'm going to look into additional radio and antenna options for GMRS.....On foot with a backpack, I'm thinking that a handheld radio can be stowed in a holder attached to the backpack, an external mic on the shoulder or headset and maybe even figuring out some way to incorporate a better antenna into the backpack itself. Think ww2 backpack radio with long honking antenna, same principle ideaI just want to get an actual 2 miles, no matter where, no matter what.
    What we did with SAR radios is mount handheld up high on telescoping mast attached to pack frame, so radio is about head level, and use 1/4 solid whip on the portable with 1/4 wave counterpoise wire attached to shield of antenna connector at radio chassis and dangling, tied off to pack.

    Then use hand mic plugged into radio. Power radio from 7ah gel cell battery in backpack. We were using VHF high band 155.16, 155.175 and 154.28, but principles are the sale.
    The ENEMY Is Listening
    HE wants to know what YOU know.
    Keep it to yourself.


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