Not Logged on
[Register] [Logon] 
Section Image Font Size AdjusterDecrease Font SizeIncrease Font Size  

Interferance on the HF

Submitted: Monday, Aug 06, 2007 at 18:45

Vince NSW

Article Overview - HF Radio Installation
In this article, we discuss the procedures for installing a HF radio and the modifications that can be considered for a successful installation. View Full Article...
For the HF experts. I know what is causing it, but how to fix. When ever the fridge turns on I get it. Fridge is on the aux battery & Hf on the main battery so should be ok. However I have the cables for the HF & fridge running about 100 mm apart to the back of the car. Could I be getting an induced current flow from the fridge power cables ?
Or am I way off the mark ?
Vince

VKS-737 Romeo 1776
Member: My Profile
Advertisement
ThreadID: 48470 Replies: 3
Views: 680 FollowUps: 1
This Thread has been Archived
Thread Summary
AnswerID: 256127   Submitted: Monday, Aug 06, 2007 at 19:34

Member - Uncle (NSW) replied:

Hi Vince, I'm no expert on HF's , but rmember reading on the Boiling billy(Explore Australia) site a while ago that Craig Lewis was talking about the same problem. They ended up putting a switch inline on the fridge power cables and mounted it on the dash to turn the HF off while transmitting. Cheers Unc, hope that helps a bit?

Click Image to Enlarge
Currently on Tour..!!
Reply 1 of 3
FollowupID: 517239   Submitted: Monday, Aug 06, 2007 at 21:21

Member - Doug T (W.A) posted:

That is exactly what I did ....and it's cheap and it works
Cannington ICON Trailers
Click Image to Enlarge
Doug & Dusty
Trailers from the Cannington ICON at Cannington Mine.
Member: My Profile
FollowUp 1 of 1
AnswerID: 256139   Submitted: Monday, Aug 06, 2007 at 19:59

Footloose replied:

Vince, what kind of radio, and what kind of fridge ? If it's a waeco, the pronblem is well documented in the archives of this forum, and also the Codan Yahoo groups files.
Reply 2 of 3
AnswerID: 256180   Submitted: Tuesday, Aug 07, 2007 at 00:05

V8 Troopie replied:

Vince, I had an fridge/ radio interference problem on my trailable yacht. The fridge has a danfoss compressor.
I tried all sort of things.
The simplest and quit effective 'cure' was fitting a good, short earth wire from a clamp around the copper gas filler pipe, where it emerged from the compressor, to the battery negative.
I also fitted a specific line noise suppressor, with less than spectacular results.
Lastly, I removed the fridge's electronics board from its plastic enclosure and fitted it inside a shielded, eathed metal enclosure. This did add some improvement but I would NOT recommend anybody to try that unless youre into electronics and know EXACTLY what you are doing - it involves cutting wires!
All the above minimised the noise to a level I can live with though it had not completely disappeared.
BTW, I found the noise came in through the antenna, the fridge PCB board & wiring radiated it and the radio antenna picked it up.

Your results may vary since you may have different compressor electronics.
Klaus
Reply 3 of 3