Fridge in prado

Submitted: Wednesday, Jul 01, 2009 at 10:40

ThreadID: 70293 Views:3035 Replies:4 FollowUps:4

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Lachie

Hi
I was wandering if anyone out there has a problem listening to AM radio in a prado when there is a car fridge in the back working.
This was highlighted last September when we were trying to listen to the AFL grand final in the big desert. Every time the compressor cut in the radio would squeal . I don't know why we tried listening to it anyway. Only made us mad. But that is another matter.

Some auto electricians say the power box in the fridge is faulty.
Is it because the antenna of the prado's is intregated into the back side windows and not at the front like most vehicles ?

Lachie

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Reply By: Geoff M (QLD) - Wednesday, Jul 01, 2009 at 10:56

Reply By: 120scruiser (NSW) - Wednesday, Jul 01, 2009 at 19:26

Reply By: Lachie - Wednesday, Jul 01, 2009 at 21:12

Reply By: oldtrack123 - Wednesday, Jul 01, 2009 at 21:43

Wednesday, Jul 01, 2009 at 21:43

Hi Lachie

If the radio signal is weak then the inverter circuit in the fridge can generate sufficient "noise' to be a problem .
If it is ok in good signal areas there is no problem with the fridge.
The problem is to determine whether the interference is coming thro the 12v wiring or is radiated & being picked up by the aerial.
The nearer the fridge is to the aerial the more likely it is to pick up noise, does it decrease if you move the fridge further away?
If it does then it is a difficult one to solve except by distance.
To confirm if its thro the 12v wiring you would need to connect the fridge to a separate 12v source with no connection to the car wiring.
If it is thro the12v wiring , a noise filter [Jaycar part #AA-3706] in the fridge line could minimise it

AnswerID: 372707

Follow Up By: Lachie - Thursday, Jul 02, 2009 at 20:03

Thursday, Jul 02, 2009 at 20:03

Thanks
The radio strength does not make much difference.
I have just hooked the fridge to the 240 v with the fridge still in the back of the Prado and the problem is still there. Moving the fridge towards the front does slightly improve reception .
Lachie

FollowupID: 640062

Follow Up By: Lachie - Thursday, Jul 02, 2009 at 20:03

Thursday, Jul 02, 2009 at 20:03

FollowupID: 640063

Follow Up By: oldtrack123 - Thursday, Jul 02, 2009 at 22:54

Thursday, Jul 02, 2009 at 22:54

Hi
That fridge uses a Danfoss system So I would say it is radiated noise, being picked up by aerial .NOt familar with that brand ,does it have a metal case.
If so You maybe able to minimise it by connecting the case by a SHORT heavy cable to the nearest possible metal body point [MUST be earthed to frame }

FollowupID: 640111