Interference on HF radio

Submitted: Thursday, Dec 07, 2006 at 20:54

ThreadID: 40154 Views:2742 Replies:4 FollowUps:8

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PandJ

Hi Folks,

I own one of these fancy 2003 3.0ltr Nissan Patrols and when listening on the HF radio with the wipers operating I get interference over radio.
When using the air-con I get the same. This could be the compressor or the electric fan out front of condenser and radiator as it cuts in and out every 30 seconds. Any suggestions to alleviate fault would be appreciated.
Thanks P&J

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Reply By: wilko65 - Thursday, Dec 07, 2006 at 21:08

Thursday, Dec 07, 2006 at 21:08

My interference comes from the thermo fan that comes on with the air con compressor. It never rains here, so I am not sure about the wipers, but I would say that the wipers, windows and just about anything else will interfere to a certain degree. Danfoss BD35f compressors common in alot of fridges also interfere horribly. The older model BD35's weren't as bad. Seems worse on a few frequencies. When you find a fix for it, please post on this site, or better still, patent the idea and email us from the Bahama's with the fix. I have 2 electrical trades and have spent some time trying to eliminate it with littel success. No body else I know has found a 100 % fix either.
Good Luck.

AnswerID: 209195

Follow Up By: Footloose - Thursday, Dec 07, 2006 at 22:04

Thursday, Dec 07, 2006 at 22:04

First thing to try is a 0.001 cap across the motor. You can also try some clip on ferrite blocks on the leads. This should bring the interference down to a manageable level. Using earthing straps between the hood and chassis is another thing to try.
As for the compressors, I've already posted the story with those. It involves a low pass filter.
Cheers

FollowupID: 469205

Follow Up By: Gerhardp1 - Friday, Dec 08, 2006 at 09:12

Friday, Dec 08, 2006 at 09:12

What's a hood?

FollowupID: 469234

Follow Up By: Robin - Friday, Dec 08, 2006 at 11:30

Friday, Dec 08, 2006 at 11:30

The car's bonnet

Robin Miller

FollowupID: 469252

Follow Up By: Member - John (Vic) - Friday, Dec 08, 2006 at 13:42

Friday, Dec 08, 2006 at 13:42

Hood???? - Mafia type person who normally is of Italian decent and has origins in New York, carries a gun and possibly a knife.

VKS737 - Mobile 6352 (Selcall 6352)

Lifetime Member
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FollowupID: 469273

Follow Up By: Gerhardp1 - Friday, Dec 08, 2006 at 13:50

Friday, Dec 08, 2006 at 13:50

That's what I thought - a hood's a hood, and a bonnet is what real aussies cover their engine bays with.

For those who have eaten too much Maccas, the other end's the boot.

FollowupID: 469274

Reply By: Muzzgit [WA] - Thursday, Dec 07, 2006 at 23:37

Thursday, Dec 07, 2006 at 23:37

I get interference thru my UHF which I think is caused by the ABS. The noise clicks faster as my speed increases. 2000 GU Patrol.

AnswerID: 209215

Follow Up By: Member - Banjo (WA) - Friday, Dec 08, 2006 at 00:36

Friday, Dec 08, 2006 at 00:36

My Magellan Meridian causes a 'whine' in the radio. This is when operating the GPS from either the AA internal batteries or plugged into cigarette lighter.
The noise isn't there using the Tape or CD.
Banjo (WA)

Member
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FollowupID: 469214

Follow Up By: anglepole - Friday, Dec 08, 2006 at 13:12

Friday, Dec 08, 2006 at 13:12

I have the same problem, GUIV Patrol. I don't have ABS, I have proved that it is the speedo sensor or parts. The interference appears when the speedo starts to work.

The interference varies dependent on the frequency (in this case HF) Ferrite clips have marginally helped.

The usual earthing measures (plus some) have done very little to help.

Post a cure if you find one.

Cheers

FollowupID: 469269

Reply By: Willem - Friday, Dec 08, 2006 at 08:43

Friday, Dec 08, 2006 at 08:43

Sorry, can't help here. Drive old technology truck.

All these fancy trucks with their delicate electronics......it'll get worse.

PandJ...when are you joining up as a member? 'bout time, eh?...LOL

Cheers

AnswerID: 209230