I think I need a noise filter, please help!

Discussion in 'CB Radio Forum' started by Fastphil, Sep 25, 2011.

  1. Fastphil

    Fastphil Bobtail Member

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    Sep 25, 2011
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    So I have a basic CB radio in my 2011 Volvo, it's a Cobra WX18STII.
    I've always had problems with the electrical noise that my 1200W inverter causes. Besides the static bursts that I hear over the CB's speaker whenever the inverter is actually powering anything (I drive with my laptop running and plugged into the inverter), I've recently discovered that the messages I transmit (outbound) are severely affected by this as well. I'm just googling the subject of CB noise, and there's a ton of technical stuff that goes right over my head, but I have figured out that what I'm dealing with is called inducted noise, coming from the electrical wiring.

    I've found several brands of CB noise filters that claim to help clean up INCOMING signals, but my incoming signals are fine, as far as I can tell. Do these types of noise filters do anything for OUTBOUND signals? Can anybody point me in the right direction? I don't mind spending $20-30 (that's about as expensive as I've seen for these filters), but I'm not interested in any fancy high-tech gear. Please help!

    Thanks,

    Phil
     
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  3. Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    You have to run the wires from the radio STRAIGHT to the battery's, and dont forget to put a fuse right of the battery.
     
  4. Fastphil

    Fastphil Bobtail Member

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    That was quick! It's a company truck, I don't want to do anything complicated, or anything that I can be blamed for if the truck ever burns to the ground. :p
     
  5. Hardlyevr

    Hardlyevr Road Train Member

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    The problem, as you sorta know, is the inverter. No, noise filters do not help on the transmit side. Different brands, or quality of inverter may help. I have had inverters that made noise on other channels, but were OK on 19.
     
  6. Fastphil

    Fastphil Bobtail Member

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    Sep 25, 2011
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    That's interesting, how can I find out which inverters will work without having to buy each one?
     
  7. Hardlyevr

    Hardlyevr Road Train Member

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    My experience was only thru owning, unless you surveyed other drivers.....
     
  8. Fastphil

    Fastphil Bobtail Member

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    Sep 25, 2011
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    Can anyone else elaborate or confirm Hardlyevr's claim that a different inverter could cure this problem? I'm not about to spend hundreds of dollars testing inverters in hopes that they work!
     
  9. josh.c

    josh.c Road Train Member

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    Do you run anything besides your laptop on the inverter? You might try getting a cigarette lighter plug for your computer, although that's not a guaranteed solution either. The one I have doesn't make any noise, but my inverter does. YMMV.

    Slightly off-topic, but what do you use that you need to run your computer all day for? I'm a one-truck show, running my own authority, so I'm constantly emailing and faxing stuff, but I'm not good enough to do that and drive at the same time, so I just turn the computer off.
     
  10. dave26027

    dave26027 Road Train Member

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    For absolute clean transmitting and receiving, you could run your CB off of your own independent battery. Charge it at home, or with the truck's 12V system when you're not using it.
     
  11. Fastphil

    Fastphil Bobtail Member

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    Sep 25, 2011
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    I run Microsoft Streets & Trips while I'm driving. It's not absolutely necessary, but I use it for checking distances at a glance. Other than that, I have a microwave that I use when I'm stopped.

    A driver told me yesterday that he was only hearing every second word when I was transmitting. He suggested that I may have a mic or antenna problem. I suppose swapping mics is easy enough, I will try that soon.
     
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