1. You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
    Dismiss Notice
Dismiss Notice
This forum does not allow a single user to have more than one username. If anyone wants to change their username contact an admin and it will be done. Multiple accounts belonging to the same member will be deleted without warning.

STATIC NOISE MOBILE SETUP IN BIG TRUCK

Discussion in 'CB Antennas' started by anixon, Apr 7, 2007.

  1. anixon

    anixon Member

    Joined:
    Jun 11, 2006
    Messages:
    52
    Likes Received:
    0
    start out with. over 7 diffent cb's, 3 new antennas,4 new mounts and 2 18' coax. 4- new plastic washers on mount to.
    the problem was with everything i try above.
    meter runs only at about 1-2 lbs at all times. i get static noise all the time. i can transimit just fine but recice is only good at about 1-2 miles and the noise is loader then there volice. if they are closer then 1 mile they over ride the noise and the meter runs truer. the swr i have had 4 radio shops check it and they all tell me its a 1.4. i have a swr meter and it reads 1.4. i have even taken a heavy pc. of wire and ran it from the mount to the door hingle. and there was no change. this noise and rec. is the same with truck running or stop with key off. power supply i used factory supply and then run right from fuse box. this has factory mount on drivers door mirror and still the same thing. truck is a 2004 mack vision with mirror mounts. any help


     

  2. anixon

    anixon Member

    Joined:
    Jun 11, 2006
    Messages:
    52
    Likes Received:
    0
    right now running cobra 29 with noise cancelling mic. with k40 antenna.
    also on the coax you have the inner and outer cable. outer is ground. why is it when you screw that on to a mirror mount and then place that plastic washer on top of mounting hole so mount stud does not ground out. but my thing is. isn't the big bottom part of stud ground because you screwed the coax on to stud. and also if the inner is (i will say positive) and when you screw the antenna on to the nut on top of mount there is no contact with the center section. i mean if the nut is 1" long that the antenna screw into and the antenna only screws in 1/2" where is the contact with the center. i hope this make sense.
     
  3. mopar2ya

    mopar2ya Member

    Joined:
    Apr 3, 2005
    Messages:
    73
    Likes Received:
    1
    "this noise and rec. is the same with truck running or stop with key off."

    If you have a power inverter, turn it off. The problem you are describing with truck on or off, different antennas, different radios, etc. would lead me to believe that you have something running in the truck all the time that doesn't go off with the key. More than likely something you or someone else added to the truck that isn't normally there.

    Mopar
     
  4. anixon

    anixon Member

    Joined:
    Jun 11, 2006
    Messages:
    52
    Likes Received:
    0
    DON'T HAVE A INVERT.
    don't run truck execpt to go from point a to b. company has a heater and cooling system setup in truck for comfort. heater when use, only uses 1 gal. per 24 hrs use.
    the same noise is in another truck of the same type to.

    maybe it may be me, because i had cb's in the early 70's to late 70's and had no problem talking with other drivers 7- 10 miles apart. maybe then days are gone with the world changing. and old this new so called tech. junk out there.
     
  5. anixon

    anixon Member

    Joined:
    Jun 11, 2006
    Messages:
    52
    Likes Received:
    0
    thanks will do. i'm going to truck sunday and hook radio up to my pick up for power and just use antenna on big truck and see what happens.
    i'm just tried of all the noise all the time if you know what i mean. i have brought cobra's galaxy connex and general lee. and had the same problem. i figured it was radios. but later buying another radio had the same problem. makes me mad because the connex and gen. lee were the talking machines. i will check on steer fuild to.
    thanks
     
  6. Hamin' X

    Hamin' X Active Member

    Joined:
    Mar 11, 2006
    Messages:
    262
    Likes Received:
    3
    As sixbrix said, check for anything that is charging, or on in the truck. I had a very similar problem and finally tracked it down to the cigarette lighter adapter for my XM radio. It made no difference whether the XM was on, or off; S-3 noise level. Even when the XM was unplugged from the adapter, the noise was present. But, I unplugged the adapter and the noise went away. It could even be the AM/FM radio built into the truck. I had one that generated noise as long as it had power to it (The clock, I think). Start pulling breakers and fuses, one at a time and see if the noise goes away.

    Rich
     
  7. spiderman5095

    spiderman5095 Member

    Joined:
    Apr 17, 2005
    Messages:
    34
    Likes Received:
    0
    The company I work for has installed a computer in all of their trucks that tracks a lot of different things--idle time, instances of hard braking, log book information (it does our log books for us), etc. That computer puts out quite a bit of RF noise. I finally was able to reduce that noise by unplugging the handheld keypad/display. Unplugging it did not interfere with the data being recorded, but did reduce the RF noise by a lot. I now can hear between 10 to 20 miles where before I was lucky to hear more than 5.
     
  8. Peddler

    Peddler SWR (sandwich with rum) Expert

    Joined:
    Aug 6, 2001
    Messages:
    2,457
    Likes Received:
    9
    We used to call those things a "Tattle Tale" except they charted on a round piece of paper.
     
  9. W5LZ

    W5LZ Crotchety Old Bastard

    Joined:
    Apr 8, 2005
    Messages:
    6,832
    Likes Received:
    800
    You're showing your age Peddler - lol! Loved those @#$ 'tachagraphs'...
    - 'Doc
     
  10. Beetle

    Beetle Sr. Member

    Joined:
    Dec 7, 2005
    Messages:
    2,995
    Likes Received:
    986
    Try the "shirtpocket AM radio" trick. For this you'll need a small AM radio, which you tune between stations to an unused frequency.

    Stick the radio under the dash, up by the headliner, under the hood...EVERYwhere. Listen for where noise gets louder, then see what's in the neighborhood that can cause it.

    With the key out of the ignition and the noise present in the radio, try disconnecting the antenna to see if it's coming in on the antenna or on the power leads.
     
  11. FL Native

    FL Native Registered User

    Joined:
    Apr 3, 2005
    Messages:
    1,385
    Likes Received:
    30
    ya thast what i was thinking. this could be solved maybe by a filter on his radios power lead.

    or rerouting his coax. "shrugs"
     

Share This Page

  • About Us

    The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
  • Like us on Facebook

  • Premium VIP Member

    The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? We'd really appreciate it!

    Donate to us!