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NJSS
Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10506
  
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| Radio interference - alternator ? |
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I'm in France at present (North Brittany), and like to listen to the BBC on AM on the D3 radio.
With my D2 this was easy, and reception was reasonably good.
With the D3 it's OK without the engine running, but not as good as the D2.
With the engine running there is considerable interference, which is related to the engine RPM - I assume that as the car is diesel this must be coming from the alternator.
There is no interference on FM.
Thoughts please?
The car is a couple of months old, will LR fix the problem under guarantee?
NJSS Am I Gammon or Woke ? - I neither know nor care.
2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t.
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 28th Jul 2009 10:50 am |
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DingMark
Member Since: 14 Sep 2007
Location: Perth Oz or Erbil, Iraq
Posts: 388
 
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I had a refrigerator (forget the brand) that did the same thing (sold the fridge). Do you have anything else plugged in which energises when the engine starts (or when the ignition is turned "ON")? I was later told that some fridge motors cause interference, particularly as the D3 radio antenna is on the side rear window. A power inverter, to charge my laptop, also does the same thing. Jim Dowell - D4 HSE TDi, 12,000 hydraulic winch & hidden winch mount, MTRs, TyreDog, Traxide 2 x aux battery system, fixed air compressor, Dolium roof rack, MitchHitch.
RIP 2005 D3 HSE V8 5 seater gold (stolen and torched)
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| 28th Jul 2009 2:02 pm |
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NJSS
Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10506
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Thanks DingMark - no nothing other than TomTom GPS which clearly isn't at fault.
NJSS Am I Gammon or Woke ? - I neither know nor care.
2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t.
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| 28th Jul 2009 2:19 pm |
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Mr Andrew
Member Since: 28 May 2007
Location: Sydney, Australia
Posts: 128
  
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Perhaps you have tinted windows that include a metallic film element? If so, they reduce the efficiency of the antenae, therefore making it a weak signal more often. You only get the altenator interference when the radio signal is weak? That's the case for me.
I had a chat to the dealer, but I think the answer is basically tough. Works fine with strong and medium signals, only is a problem with faint ones. I did think about installing a more serious, roof mounted antenae to improve signal strength, therefore reducing the extent to which the head unit ramps up its sensitivity (whih is what creates the problem).
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| 31st Jul 2009 12:50 pm |
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NJSS
Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10506
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Thanks Mr Andrew - I fear you may be correct.
What is annoying is that my diesel D2, which like my D3 has heated front & rear screens, received a clear signal with no interference when parked in the same spot.
NJSS Am I Gammon or Woke ? - I neither know nor care.
2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t.
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| 1st Aug 2009 11:47 am |
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gringle
Member Since: 30 Sep 2007
Location: Twyford, Berkshire
Posts: 126
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I had a similar problem - it turned out to be the rear LED bulbs I'd added from Ultra LEDs.
One of the bulbs would cause complete radio interference when lit - either when braking or when exterior lights were on.
Just another thing to check ...
Cheers,
Rob. Rob aka gringle
D3 07 TDV6 HSE Stornaway Grey [X100 ***], Mantec Plate, Black badges, disco3.co.uk sticker on the tailgate.
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| 1st Aug 2009 3:39 pm |
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