Crackling radio

johnp10

Free Member
Oct 12, 2009
7,775
15,186
North Lincolnshire
Funster No
8,872
MH
C Class
Exp
8 years ish
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

LIFE MEMBER
Dec 5, 2008
658
36,082
Macclesfield
Funster No
5,089
MH
Zilch Mk1
Exp
From Aug 2007
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.
 
OP
johnp10

johnp10

Free Member
Oct 12, 2009
7,775
15,186
North Lincolnshire
Funster No
8,872
MH
C Class
Exp
8 years ish
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:

Subscribers  do not see these advertisements

 
Apr 28, 2010
2,440
7,275
St Albans
Funster No
11,285
MH
Winnebago Sightseer
Exp
11yrs, but many years a tugger.
Have you got anything running on usb, like an adapter plugged into the gig. socket. They can throw out loads of mush. :Smile:
 
OP
johnp10

johnp10

Free Member
Oct 12, 2009
7,775
15,186
North Lincolnshire
Funster No
8,872
MH
C Class
Exp
8 years ish
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

Free Member
Apr 29, 2014
673
328
leeds
Funster No
31,196
MH
autotrail
Exp
3
usualy a suppressor,,,you used to be able to get a in-line suppressor dont know if you still can, sorry,,,:Sad:

Subscribers  do not see these advertisements

 

hilldweller

LIFE MEMBER
Dec 5, 2008
658
36,082
Macclesfield
Funster No
5,089
MH
Zilch Mk1
Exp
From Aug 2007
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.
 
OP
johnp10

johnp10

Free Member
Oct 12, 2009
7,775
15,186
North Lincolnshire
Funster No
8,872
MH
C Class
Exp
8 years ish
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.

Subscribers  do not see these advertisements

 

Tootles

Funster
Deceased RIP
Sep 14, 2013
9,512
34,790
Lancaster
Funster No
28,093
MH
Coachbuilt
Exp
Was a newbie, now a Middie.
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

Free Member
Sep 13, 2009
3,335
9,258
Berwickshire
Funster No
8,441
MH
A class Neisman Bischoff
Exp
since July 2009
Just change the bloody radios name..... :Doh:














































































to... :whatthe:






























































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

Subscribers  do not see these advertisements

 
Jun 8, 2012
1,593
1,639
Reading
Funster No
21,386
MH
Riot Van Conversion
Exp
Since 2012
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.
 

DeuceBG

Free Member
Oct 28, 2013
486
433
Lincoln
Funster No
28,788
MH
Van Conversion
Exp
0
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

LIFE MEMBER
May 5, 2010
19,752
135,464
Funster No
11,412
MH
None
Exp
10 years
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:
 
OP
johnp10

johnp10

Free Member
Oct 12, 2009
7,775
15,186
North Lincolnshire
Funster No
8,872
MH
C Class
Exp
8 years ish
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:

Subscribers  do not see these advertisements

 
Last edited:

Tootles

Funster
Deceased RIP
Sep 14, 2013
9,512
34,790
Lancaster
Funster No
28,093
MH
Coachbuilt
Exp
Was a newbie, now a Middie.
As my old grandad used to say....."University of hard knocks" ::bigsmile:

Subscribers  do not see these advertisements

 
Top