Crackling radio (1 Viewer)

johnp10

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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?
 

hilldweller

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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.
 
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johnp10

johnp10

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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:

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SuperMike

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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:
 

WynandJean

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Yes, sounds typical of aerial problem.

Wyn

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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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johnp10

johnp10

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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.

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

Hope it's an aerial problem.
Cheapest fix.
 

sean n maggie

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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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hilldweller

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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:

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.
 
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johnp10

johnp10

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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.

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

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Tootles

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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:
 

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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cmcardle75

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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:

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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Have you fitted any LED Vehicle Running Lights?
Some of the LED Units will affect the radio reception causing a loud, distinct hissing noise which will go away when the lights are switched off.
 

Chris

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I had a problem with crackling in the cab.

My solution was to ban roast pork sandwiches from the cab area.

Immediate solution.

Hope that helps:thumb:
 
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johnp10

johnp10

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Have you fitted any LED Vehicle Running Lights?
Some of the LED Units will affect the radio reception causing a loud, distinct hissing noise which will go away when the lights are switched off.

No, none fitted, but useful info.
Thanks.

I had a problem with crackling in the cab.

My solution was to ban roast pork sandwiches from the cab area.

Immediate solution.

Hope that helps:thumb:


THAT'S IT!!! :thumb:

The benefit of a University education, eh? :notworthy:

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Last edited:

Tootles

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As my old grandad used to say....."University of hard knocks" ::bigsmile:

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