Waeco HF interference...update

Submitted: Tuesday, Feb 28, 2006 at 15:24
ThreadID: 31254 Views:2114 Replies:6 FollowUps:16
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Firstly a big thanks to all that offered suggestions. They are appreciated.
I've spent a morning with Waecos technical people. They couldn't have been nicer or more co operative. They know of the problem, and are still working on it.
In the meantime, if you have a waeco (and they all use the same control module) and are having problems on various HF frequencies, grab a Schaffner FN2060 filter from Farnell. This filter doesn't "fix" the problem, but it certainly gets it to a level where you should be able to live with it (ie way down in the noise).
This was demonstrated (much to my surprise and waeco's delight ) this morning.

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Reply By: Member - John (Vic) - Tuesday, Feb 28, 2006 at 16:11

Tuesday, Feb 28, 2006 at 16:11
Footy good the see you have had a reasonable resolution.

Where precisely did they fit the filter?

Cheers
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Follow Up By: Footloose - Tuesday, Feb 28, 2006 at 16:26

Tuesday, Feb 28, 2006 at 16:26
John, much to my surprise its inline with the dc plug into the fridge.
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Follow Up By: Mike Harding - Tuesday, Feb 28, 2006 at 16:33

Tuesday, Feb 28, 2006 at 16:33
Sounds like the RF was being radiated from the supply cable then, not surprising. The bit you are still hearing is probably coming directly from the electronics but they no longer have 5m (or whatever) of antenna wire to get that RF out into the ether.

Mike Harding
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Follow Up By: Footloose - Tuesday, Feb 28, 2006 at 17:11

Tuesday, Feb 28, 2006 at 17:11
Mike , the bulk of the interference appears to be a differential signal across the supply line, which is why the success of the filter surprised me.
As you know, simple inline filters don't tend to work too well with this situation.
The fact that Waeco had a 3 stage EMI filter on hand surprised me also :)
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Reply By: Laura B - Tuesday, Feb 28, 2006 at 16:33

Tuesday, Feb 28, 2006 at 16:33
what is this problem???could you please tell me the post number so that i could read it....thanks....

Laura B
AnswerID: 157562

Follow Up By: Member - Roachie (SA) - Tuesday, Feb 28, 2006 at 16:44

Tuesday, Feb 28, 2006 at 16:44
31,200
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Reply By: Member - Roachie (SA) - Tuesday, Feb 28, 2006 at 16:56

Tuesday, Feb 28, 2006 at 16:56
Just off topic a bit, but has anybody bought/used one of these newish expensive speakers (about $300-) that are supposed to cut back all/most background noise on the HF?
I don't know their exact name; any info would be appreciated.
Cheers
Roachie
AnswerID: 157571

Follow Up By: Footloose - Tuesday, Feb 28, 2006 at 17:04

Tuesday, Feb 28, 2006 at 17:04
Roachie you mean DSP speakers ? Work well, just like a big filter (which is what they are basically). However, in practise they make the speech clearer rather than get rid of impulse type noise IMHO.
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Follow Up By: Member - Roachie (SA) - Tuesday, Feb 28, 2006 at 17:15

Tuesday, Feb 28, 2006 at 17:15
TY Footy, I'll google it.......
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Follow Up By: Footloose - Tuesday, Feb 28, 2006 at 17:39

Tuesday, Feb 28, 2006 at 17:39
Roachie, as you know, DSP means Digital Speech Processing. If you know anyone with a Codan NGT radio, get them to give you a demo.
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Follow Up By: Mike Harding - Tuesday, Feb 28, 2006 at 18:18

Tuesday, Feb 28, 2006 at 18:18
I haven't used them but reports I have heard from the Amateur Radio community say they are _excellent_ - and for A$300 or more they damn well should be! :)

Mike Harding
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Follow Up By: Member - John (Vic) - Tuesday, Feb 28, 2006 at 18:38

Tuesday, Feb 28, 2006 at 18:38
As Footy is saying the NGT already has DSP fitted and the difference between it and a radio not fitted with DSP is rather broad.
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Follow Up By: Mike Harding - Tuesday, Feb 28, 2006 at 18:46

Tuesday, Feb 28, 2006 at 18:46
Well... my Yaesu FT-857D has a DSP (Digital Signal Processing btw) but it's not very good - I consider it to be a posh tone control but it has it's moments on some weak HF stuff.

These speakers (I think Kenwood make one?) are a bit of a different kettle of wombats being _specifically_ designed to tidy up audio and, as I said, are reported to be very good - people with the 857D say they are worth buying - but I'm not going to, then again I don't use HF when mobile only when camped.

Mike Harding
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Reply By: Geoff M (Newcastle, NSW) - Tuesday, Feb 28, 2006 at 20:56

Tuesday, Feb 28, 2006 at 20:56
Footloose,
Did they put the filter in any special position or just in the cable?
What I mean is, did they position it as close as possible to the fridge or close to the plug or "about here will do" ?

Geoff.
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Follow Up By: Footloose - Tuesday, Feb 28, 2006 at 21:37

Tuesday, Feb 28, 2006 at 21:37
Geoff, between the normal plug and the fridge. The filter also has an "earth" lead on the fridge end, not quite sure what he did with that...I was too amazed to notice.
As I said, this is a fix rather than a cure. I've also posted the circuit with values of components to the Codan group btw.
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Reply By: D-Jack - Tuesday, Feb 28, 2006 at 21:42

Tuesday, Feb 28, 2006 at 21:42
Can anyone advise if the same problem happens with ENGELS?
AnswerID: 157646

Follow Up By: Member - Paul P (Bris) - Wednesday, Mar 01, 2006 at 08:54

Wednesday, Mar 01, 2006 at 08:54
Greetings

To my knowledge no. Different compressor. Dan Fross compressors are known to cause HF interference. (WAECO and others).

My ENGEL backs onto my HF (CODAN NGT) and does not cause interference.

Regards

Paul
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Reply By: res.q.guy - Tuesday, Feb 28, 2006 at 22:30

Tuesday, Feb 28, 2006 at 22:30
Ther is currently a discussion on the Codan Users Group on Waeco interference and some one has come up witha filter that helps
You can access this file at the URL:
http://groups.yahoo.com/group/codan_outback_radio/files/General%20INFO/Waecofilter.JPG
This may be of help to some.
AnswerID: 157684

Follow Up By: V8 Troopie - Wednesday, Mar 01, 2006 at 01:52

Wednesday, Mar 01, 2006 at 01:52
Yes but one cannot see that info if one is not a member of that codan group.
any chance to access it elsewhere as I really do not want to join yet another yahoo group?
Klaus
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Follow Up By: res.q.guy - Wednesday, Mar 01, 2006 at 07:49

Wednesday, Mar 01, 2006 at 07:49
Hi Klaus
Sorry ,I forgot about that !!!!!
Email me and I will send you a copy of the filter diagram.
Regards
Neil
res.q.guy@westnet.com.au
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Follow Up By: Mike Harding - Wednesday, Mar 01, 2006 at 08:25

Wednesday, Mar 01, 2006 at 08:25
If you care to put it on this site and post a link here everyone can access it.

http://ul1.rapidshare.de/

Mike Harding
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Follow Up By: Member - John (Vic) - Wednesday, Mar 01, 2006 at 11:49

Wednesday, Mar 01, 2006 at 11:49
res.q.guy
The bloke who posted all the detail on the Waeco issue on the Codan Site is the very same gentlemen who started this thread.

Cheers
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