Tuning Center load Antenna

Discussion in 'CB Radio Forum' started by dealer374, Jun 25, 2017.

Page 2 of 2
  1. Jul 1, 2017 #11
    rabbiporkchop

    rabbiporkchop Road Train Member

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    Not my truck. You would need to ask the owner.
     
    rabbiporkchop, Jul 1, 2017
    rabbiporkchop, Jul 1, 2017
    #11
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  3. Jul 5, 2017 #12
    craig_sez

    craig_sez Road Train Member

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    Personally....I would loose the spring and see about a longer shaft "IF"height is needed..
    Try 1st all your tuning w/o the spring..
     
    craig_sez, Jul 5, 2017
    craig_sez, Jul 5, 2017
    #12
  4. Jul 18, 2017 #13
    dealer374

    dealer374 Bobtail Member

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    UPDATE: I removed the spring and i've slowly cut off about 2.5". My SWR on Ch. 1 & 40 now is right about 1.25 on both. As I cut about 1/2" off at a time SWR on 1 and 40 dropped until 1 stopped at 1.25 and ch 40 kept dropping closer. When ch. 40 hit the same 1.25 SWR on ch 1 I stopped with the tune I have now.

    I get just over a mile range with the gain at 3 o'clock on a cobra 29ltd in a Urban area mounted on 2004 mack tri-axle dump. 10" shaft w/ 4' whip, the coil sits above the roof line but is still below the cab shield... that has got be hurting my range???

    Trailer dump guys will real dual wilsons in my area say they get 10 miles
     
    dealer374, Jul 18, 2017
    dealer374, Jul 18, 2017
    #13
    stacks Thanks this.
  5. Jul 18, 2017 #14
    craig_sez

    craig_sez Road Train Member

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    Where and what is ant mounted to..post a pic..A good close one...Swr doesnt mean alot..Its a basic measurement just to tell the operator how much power is commin back to the radio BUT it doesnt mean all is good as your now seeing..
     
    craig_sez, Jul 18, 2017
    craig_sez, Jul 18, 2017
    #14
    rabbiporkchop Thanks this.
  7. Jul 27, 2017 #15
    dealer374

    dealer374 Bobtail Member

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    Thanks craig, Here are a few pictures of my mounting setup.

    [​IMG]
    [​IMG]
    [​IMG]
     
    dealer374, Jul 27, 2017
    dealer374, Jul 27, 2017
    #15
  8. Aug 2, 2017 #16
    dealer374

    dealer374 Bobtail Member

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    Anybody have any ideas? Is my mounting location the cause of the range loss? The coil is in close proximity to the dump body
     
    dealer374, Aug 2, 2017
    dealer374, Aug 2, 2017
    #16
  9. Aug 2, 2017 #17
    craig_sez

    craig_sez Road Train Member

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    Assumeing you have it connected correctly(plastic washer on top not the bottom..
    2 ideas..
    Buy a fibreglass ant (keep ground to tip of ant 13' 6")cause the coil will be up in the tip such as firestick with screwable tuning tip or skipshooter..

    ORRRR

    pick up a ant mount bracket and mount it further out the mirror arm with about 20 degree lean..
     
    craig_sez, Aug 2, 2017
    craig_sez, Aug 2, 2017
    #17
    mike5511 Thanks this.
  10. Aug 2, 2017 #18
    craig_sez

    craig_sez Road Train Member

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    Make sure coax is not pinched or partly brocken..
     
    craig_sez, Aug 2, 2017
    craig_sez, Aug 2, 2017
    #18
  11. Aug 4, 2017 #19
    Night Stalker10

    Night Stalker10 Road Train Member

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    It looks way to close to the metal dump box. Is there any chance there's a hole in the horizontal bracket that holds the mirror to the top of the mirrors bracket arm? That's where I have my antenna installed on this Pete, it's basically the same setup you have using a Hustler fs27 antenna.
     
    Night Stalker10, Aug 4, 2017
    Night Stalker10, Aug 4, 2017
    #19
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