Crackling radio

Discussion in 'Tech/Mech General' started by johnp10, May 27, 2014.

  1. johnp10

    johnp10 Funster

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    The cab radio in my van works well with the engine off.
    Good, clean sound across all wave bands and stations.

    With the engine running there is a lot of static like crackling.
    Not what I would have expected from a diesel engine.

    Any ideas?
     
  2. hilldweller

    hilldweller Funster Life Member

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    Usually a bad earth on the aerial input or the aerial mount. You can unplug at the back of the receiver and short out the aerial then if you still get crackle it's not the aerial.
     
  3. johnp10

    johnp10 Funster

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    Thanks, Brian.
    Would you expect that crackling to be present with the engine running only, or in any event if it's an earth problem?

    I'll try to figure out how the radio comes out.:whatthe:
     
  4. SuperMike

    SuperMike Funster

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    Have you got anything running on usb, like an adapter plugged into the gig. socket. They can throw out loads of mush. :Smile:
     
  5. johnp10

    johnp10 Funster

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    No, mate.
    Even cig lighter is unplugged.
     
  6. WynandJean

    WynandJean Funster

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    Yes, sounds typical of aerial problem.

    Wyn
     
  7. Daifuse

    Daifuse

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    Possibly an alternator problem - how old is it? Intermittent sparking on the slip rings on the rotor can be to blame.
     
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  8. johnp10

    johnp10 Funster

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    2000.
    It has been suggested that the suppressor in the alternator may be suspect.

    Hope it's an aerial problem.
    Cheapest fix.
     
  9. sean n maggie

    sean n maggie Funster

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    usualy a suppressor,,,you used to be able to get a in-line suppressor dont know if you still can, sorry,,,:Sad:
     
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  10. hilldweller

    hilldweller Funster Life Member

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    Well you are saying it's only with the engine running.

    To slide it out you need a tool, two U shaped pieces of wire that you insert into four small ( 3mm ) holes in the facia. Ebay or Halfrauds.
     
  11. johnp10

    johnp10 Funster

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    It seems you can.:thumb:
     
  12. johnp10

    johnp10 Funster

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    Thanks, Brian.
    I'll have a go at that.
     
  13. Bluemooner

    Bluemooner Funster Life Member

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    Think you need a new engine :Eeek: must admit i'm not much of a mechanic :ROFLMAO::ROFLMAO:
     
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  14. Tootles

    Tootles Funster

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    John, drop off at any car shop and buy an in-line power filter. You just fit in into the radio main power supply line. It sounds that you may have a diode going down in your alternator, which can cause an interference crackle, that goes faster as you rev up. I have even heard of this problem setting up a radio (5th) harmonic, whereby the set itself transmits the crackle for short distances around the alternator, and then receives it's own signal back, putting it over the speakers. :thumb:
     
  15. Wyaye wires

    Wyaye wires

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    Just change the bloody radios name..... :Doh:














































































    to... :whatthe:






























































    Rose... ::bigsmile: and sing along... :thumb:
     
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  16. cmcardle75

    cmcardle75 Read Only Funster

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    It is also worth rewiring it to your leisure battery. As well as isolating it somewhat from your noisy alternator, this means you can use it for hours with the engine off and still be able to start.
     
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  17. Lord Mac

    Lord Mac

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    Do you have a wireless reversing camera?
     
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  18. johnp10

    johnp10 Funster

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    No Mac, nor anything else which would give off a signal.

    Can only be as suggested, either an earth or an alternator suppressor fault.
     
  19. Wildbill

    Wildbill Funster

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    I would go with changing the engine:ROFLMAO:
     
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  20. Bluemooner

    Bluemooner Funster Life Member

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    Bet you would give a couple of quid for the old eh Bill:thumb:
     
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