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my swr meter battle

Discussion in 'Audio & Video' started by rab89, Aug 12, 2009.

  1. Aug 12, 2009 at 9:47 PM
    #1
    rab89

    rab89 [OP] Well-Known Member

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    Ross
    Kelowna b.c canada
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    Grillcraft mx black upper and lower BHLM with Gloss black 265 70 17 bfg a/t center console light mini mag mounted in center console debadged bed lights 35W 5000k HID's
    Hey guys, so I got a cb radio a while back, went to a shop to get it tuned, when I did, they said it was good, it wasn't!
    So I decided to buy an swr from ebay. i did so, it never showed up for a while, so I contacted the seller, they had it shipped, gave me the tracking number, and as they said, the package was sent, and it said it had arrived. well it was never here. so no i'm still without my swr and can't use the cb...
    so now, does anyone have an old swr to donate? I can't afford to buy another one, and I'm trying to get my money back from paypal but it's not looking good.

    Anyways, if someone has something let me know. thanks!
     
  2. Aug 12, 2009 at 9:55 PM
    #2
    ForeRunner

    ForeRunner BBC. Bring Back Clarkson Staff Member

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    Well, you want to make a trip down to the Seattle area?

    I've got a SWR meter and can help tune your cb.
     
  3. Aug 12, 2009 at 10:06 PM
    #3
    rab89

    rab89 [OP] Well-Known Member

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    Grillcraft mx black upper and lower BHLM with Gloss black 265 70 17 bfg a/t center console light mini mag mounted in center console debadged bed lights 35W 5000k HID's
    a bit far for a cb tune lol I'm in Kelowna b.c canada
     
  4. Aug 12, 2009 at 10:25 PM
    #4
    rab89

    rab89 [OP] Well-Known Member

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    Grillcraft mx black upper and lower BHLM with Gloss black 265 70 17 bfg a/t center console light mini mag mounted in center console debadged bed lights 35W 5000k HID's
    no one wants some rep? lol
     
  5. Aug 12, 2009 at 11:28 PM
    #5
    ForeRunner

    ForeRunner BBC. Bring Back Clarkson Staff Member

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    You're a wee bit away man. Love to help and willing to meet halfway
     
  6. Aug 13, 2009 at 7:17 AM
    #6
    KenpachiZaraki

    KenpachiZaraki Its Wicked Flow BITCHES!!

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    What's an swr?
     
  7. Aug 13, 2009 at 7:26 AM
    #7
    07trd4x4

    07trd4x4 Well-Known Member

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    I will be up in Vancouver in mid march 2010 if you need help!! Hope u will have it done by then, though!!!
     
  8. Aug 13, 2009 at 8:04 AM
    #8
    Stu

    Stu Well-Known Member

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    Not much yet, got a pretty good sound system w/ my custom sub box. Plan on adding more lights & a tool box.
    have you checked out any car stereo repair shops around? They might help, or a 4X4 shop, or an RV shop.
     
  9. Aug 13, 2009 at 8:21 AM
    #9
    gfiber

    gfiber Well-Known Member

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    Gary
    Seattle, WA
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    SWR is Standing Wave Ratio. Its a ratio of transmitted power to reflected power.
    You want all the power your radio transmits to launch off the antenna. High reflected power due to antenna mistuning or poor installiation subtracts from the transmitted power. Its not quite I am transmtting 10 watts and have 5 reflected back from a mistuned antenna so I am geting only 5 watts out but its close. Here is a copy from
    http://en.wikipedia.org/wiki/Standing_wave_ratio

    "The most common case for measuring and examining SWR is when installing and tuning transmitting antennas. When a transmitter is connected to an antenna by a feed line, the impedance of the antenna and feed line must match exactly for maximum energy transfer from the feed line to the antenna to be possible. The impedance of the antenna varies based on many factors including: the antenna's natural resonance at the frequency being transmitted, the antenna's height above the ground, and the size of the conductors used to construct the antenna.[1]
    When an antenna and feedline do not have matching impedances, some of the electrical energy cannot be transferred from the feedline to the antenna.[2] Energy not transferred to the antenna is reflected back towards the transmitter.[3] It is the interaction of these reflected waves with forward waves which causes standing wave patterns.[2] Reflected power has three main implications in radio transmitters: Radio Frequency (RF) energy losses increase, distortion on transmitter due to reflected power from load[2] and damage to the transmitter can occur.[4]"

    A tramsitter and even a receiver likes to see a properly tuned antenna most operate at 50 ohms impedance which is an AC measurement not an ohmeter measurement. The SWR meter allow you to tune the antenna for best performance. Antennas change length according to frequency. They get shorter as frequency goes up. Some amateur radio operating frequencies the antenna size is Huge, others a paper clip will suffice. Hope this helps

    Gary Fiber K8IZ
     
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