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Conference terri::cars_uk

Title:	Cars in the UK
Notice:	Please read new conference charter 1.70
Moderator:	COMICS::SHELLEYELD

Created:	Sun Mar 06 1994
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	2584
Total number of notes:	63384

623.0. "Suppression problem (Car Audio)" by SUBURB::GOSWELLR (Looney in the Making) Thu Jun 01 1989 09:49

    		< SUPPRESSION PROBLEM >
    
    Can anybody help.....
    
    I have a problem with the Radio/Cassete player.  There is terrible
    interferance when the engine is running. 
    
    	So far.
    
    		I have Suppressed the Coil 
    		 		  the Alternator (twice)
    				  Inline choke suppressor in the main
    				  power lead.
    
    		Still the interferance keeps comming.  It is also there
    		when playing cassettes.
    
    	Any help would be gratefully appreciated
    
    Ta
    
    Roger

T.R	Title	User	Personal Name	Date	Lines
623.12	Did .0 ever fix it?	LOGRUS::KELSEY	Walking the Pattern...	`Thu Aug 09 1990 09:52`	14
	Did .0 ever fix the problem? I have a similar problem on my wife's '88 Metro and haven't yet found anything that will fix it. I too, have put suppression cap's on the coil and alternator and checked earthing of unit and aerial. I haven't yet changed the HT leads ('cos they certainly have the word "suppression" on the insulation and I figured that a car this new should have fully suppressed leads as standard? The plug caps are flexible rubber rather than the rigid bakelite-type stuff I've seen before - would these be sufficiently suppressed? It's definitely an ignition problem as the crackle (or "tick") changes frequency with engine revs. How did you fix it, .0? Paul
623.13	Haynes manuals have two page section on radio suppression...	IOSG::MARSHALL	Harry Palmer	`Thu Aug 09 1990 10:19`	0
623.14	Thanks but....	LOGRUS::KELSEY	Walking the Pattern...	`Thu Aug 09 1990 13:20`	11
	Re: .-1 Thanks, I don't have the Haynes manual but do have a book which gives all the usual things to try (just like .0 did). I'm really trying to find out: 1. Did .0 fix the problem and how? (since I've also tried the things he did) 2. Before I buy new HT leads does anyone know whether the rubber-capped type are/are not suppressed? Paul
623.15	The Radio? (no I'm not suggesting a new one)!	SUBURB::SCREENER	Robert Screene, UK Finance EUC	`Mon Aug 13 1990 19:02`	6
	I used to have a similar problem with radio reception with a cheap Radio/Cassette in my first Golf. When I put a more expensive Radio/Cassette in the same car with exactly the same wiring and aerial, ALL the interference went. Rob.
623.16	dynamo?	IOSG::CARLIN	Dick Carlin IOSG, Reading, England	`Mon Jun 24 1996 17:46`	4
	When you suppress a dynamo (not an alternator) which terminal do you connect the capacitor to? Dick
623.17		FORTY2::PALKA		`Mon Jun 24 1996 17:56`	6
	re .16 The one connected to the brushes. I think that would be the thicker one (assuming there are 2 wires). Andrew