Crackling radio

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

  1. johnp10

    johnp10 Funster

    Joined:
    Oct 12, 2009
    Messages:
    7,642
    Likes Received:
    14,214
    Location:
    North Lincolnshire
    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

    Joined:
    Dec 5, 2008
    Messages:
    26,475
    Likes Received:
    25,165
    Location:
    Macclesfield
    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

    Joined:
    Oct 12, 2009
    Messages:
    7,642
    Likes Received:
    14,214
    Location:
    North Lincolnshire
    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.:Eek!:
     
  4. SuperMike

    SuperMike Read Only Funster

    Joined:
    Apr 28, 2010
    Messages:
    905
    Likes Received:
    1,019
    Location:
    St Albans
    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

    Joined:
    Oct 12, 2009
    Messages:
    7,642
    Likes Received:
    14,214
    Location:
    North Lincolnshire
    No, mate.
    Even cig lighter is unplugged.
     
  6. WynandJean

    WynandJean Funster

    Joined:
    Mar 23, 2010
    Messages:
    2,379
    Likes Received:
    1,339
    Location:
    West Midlands
    Yes, sounds typical of aerial problem.

    Wyn
     
  7. Daifuse

    Daifuse

    Joined:
    Feb 20, 2013
    Messages:
    184
    Likes Received:
    310
    Location:
    Milford Haven
    Possibly an alternator problem - how old is it? Intermittent sparking on the slip rings on the rotor can be to blame.
     
    • Like Like x 1
  8. johnp10

    johnp10 Funster

    Joined:
    Oct 12, 2009
    Messages:
    7,642
    Likes Received:
    14,214
    Location:
    North Lincolnshire
    2000.
    It has been suggested that the suppressor in the alternator may be suspect.

    Hope it's an aerial problem.
    Cheapest fix.
     
  9. sb8263

    sb8263 Funster

    Joined:
    Apr 29, 2014
    Messages:
    651
    Likes Received:
    331
    Location:
    leeds
    usualy a suppressor,,,you used to be able to get a in-line suppressor dont know if you still can, sorry,,,:Sad:
     
    • Like Like x 1
  10. hilldweller

    hilldweller Funster Life Member

    Joined:
    Dec 5, 2008
    Messages:
    26,475
    Likes Received:
    25,165
    Location:
    Macclesfield
    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

    Joined:
    Oct 12, 2009
    Messages:
    7,642
    Likes Received:
    14,214
    Location:
    North Lincolnshire
    It seems you can.:thumb:
     
  12. johnp10

    johnp10 Funster

    Joined:
    Oct 12, 2009
    Messages:
    7,642
    Likes Received:
    14,214
    Location:
    North Lincolnshire
    Thanks, Brian.
    I'll have a go at that.
     
  13. Bluemooner

    Bluemooner Funster Life Member

    Joined:
    Mar 30, 2012
    Messages:
    1,233
    Likes Received:
    1,667
    Location:
    Ribble Valley
    Think you need a new engine :Eeek: must admit i'm not much of a mechanic :Rofl1::Rofl1:
     
    • Like Like x 1
  14. Tootles

    Tootles Funster

    Joined:
    Sep 14, 2013
    Messages:
    9,022
    Likes Received:
    30,971
    Location:
    Lancaster
    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

    Joined:
    Sep 13, 2009
    Messages:
    3,831
    Likes Received:
    9,284
    Location:
    Berwickshire
    Just change the bloody radios name..... :Doh:














































































    to... :Eek!:






























































    Rose... :BigGrin: and sing along... :thumb:
     
    • Like Like x 2
  16. cmcardle75

    cmcardle75 Read Only Funster

    Joined:
    Jun 8, 2012
    Messages:
    670
    Likes Received:
    263
    Location:
    Reading
    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.
     
    • Like Like x 1
  17. Lord Mac

    Lord Mac Funster

    Joined:
    Feb 5, 2013
    Messages:
    190
    Likes Received:
    232
    Location:
    Devon
    Do you have a wireless reversing camera?
     
    • Like Like x 1
  18. johnp10

    johnp10 Funster

    Joined:
    Oct 12, 2009
    Messages:
    7,642
    Likes Received:
    14,214
    Location:
    North Lincolnshire
    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

    Joined:
    Nov 18, 2011
    Messages:
    7,095
    Likes Received:
    12,086
    Location:
    goole
  20. Bluemooner

    Bluemooner Funster Life Member

    Joined:
    Mar 30, 2012
    Messages:
    1,233
    Likes Received:
    1,667
    Location:
    Ribble Valley
    Bet you would give a couple of quid for the old eh Bill:thumb:
     
    • Like Like x 5
Loading...

Share This Page