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Home > In Car Electronics > Advice - Alpine 133BT Interference...

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Venomator Member Since: 25 Aug 2014 Location: Peterborough Posts: 2087

Advice - Alpine 133BT Interference... Long story short... My bog standard fitted Alpine 133BT unit... ... has been driving me absolutely bonkers on FM, with awful white noise type interference, sometimes blocking out reception almost completely on my London commutes! And yet around here (home area) I hardly notice the noise at all... So, y'all know I have been whimpering about having to put up with a Heritage 90 HT, which has no AirCon... This morning I decided, at 0445hrs on my way down to Londinium, to try living without AirCon from now on! ... Et voila - AirCon switched off = White Noise interference gone! Go figure... I mean, really, go figure, or at least can anyone give me a clue where to start/look to resolve said interference, pretty please...  Rog... The GREEN One... MY2016 Urban Truck Build Thread - http://www.defender2.net/forum/topic40548....al[/color] Last edited by Venomator on 11th Feb 2015 6:06pm. Edited 2 times in total

10th Feb 2015 9:49pm

Venomator Member Since: 25 Aug 2014 Location: Peterborough Posts: 2087	^ ^ ^ Does this mean I have everyone as stumped as me...  Rog... The GREEN One... MY2016 Urban Truck Build Thread - http://www.defender2.net/forum/topic40548....al[/color]
11th Feb 2015 5:56pm

need4speed Member Since: 23 Nov 2012 Location: Kilmarnock Posts: 746	Im afraid i cant help with your problem, but i will be watching with interest as ive just taken delivery of the 133's replacement (173)..
12th Feb 2015 4:03pm

steve E Member Since: 06 Mar 2011 Location: Tenby Posts: 2073	Hey Rog I've turned the A/C and the stereo off
12th Feb 2015 4:07pm

couplands Member Since: 31 Aug 2011 Location: Peak District & Cornwall Posts: 1826	It might be worth checking the aerial is fully fiitted into the rear of the radio. A poor earth will amplify any dodgy signal. I guess you could check the earth on the aerial itself too. Cheers Simon
12th Feb 2015 4:07pm

Venomator Member Since: 25 Aug 2014 Location: Peterborough Posts: 2087	steve E wrote: Hey Rog I've turned the A/C and the stereo off A step too far for me Steve...  Rog... The GREEN One... MY2016 Urban Truck Build Thread - http://www.defender2.net/forum/topic40548....al[/color]
12th Feb 2015 4:15pm

Venomator Member Since: 25 Aug 2014 Location: Peterborough Posts: 2087

couplands wrote: It might be worth checking the aerial is fully fiitted into the rear of the radio. A poor earth will amplify any dodgy signal. I guess you could check the earth on the aerial itself too. Cheers Simon Thank you Simon... I will give that a go at the weekend... Although it might be fun getting to the rear of the radio...  Rog... The GREEN One... MY2016 Urban Truck Build Thread - http://www.defender2.net/forum/topic40548....al[/color]

12th Feb 2015 4:17pm

couplands Member Since: 31 Aug 2011 Location: Peak District & Cornwall Posts: 1826	I have the same radio (but in a TD5) and I bought a couple of levers that allow you to take the radio out of its DIN cradle in the dash. The levers were a couple of £. Something like these.. http://www.ebay.co.uk/itm/Pair-Car-Radio-V...3aa2799fd0 cheers simon
12th Feb 2015 4:42pm

Venomator Member Since: 25 Aug 2014 Location: Peterborough Posts: 2087	^ ^ ^ Again, thank you Simon, most helpful...  Rog... The GREEN One... MY2016 Urban Truck Build Thread - http://www.defender2.net/forum/topic40548....al[/color]
12th Feb 2015 8:29pm

aage Member Since: 26 Jul 2012 Location: Iceland Posts: 44	I have the same unit And no interferance here. I have Defender Puma 2011 model. http://www.defender2.net/gallery/index.php?cat=13451
16th Feb 2015 6:10pm

Venomator Member Since: 25 Aug 2014 Location: Peterborough Posts: 2087	^ ^ ^ Thanks @aage, at least I know it means the fault is with my unit then...  Rog... The GREEN One... MY2016 Urban Truck Build Thread - http://www.defender2.net/forum/topic40548....al[/color]
16th Feb 2015 6:34pm

K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610

Hi Roger, We use 12 volt PA systems linked with automotive audio and visual on our vessels. A product we have used are Ground Loop Isolators that will rid you of interference if you cannot find the source itself. You need to check all your connections for security and as far as possible all your cables (especially any screened ones) for chafing or cuts, together with the grounding of your head unit. I would specifically check any air conditioning earths as well, if they are compromised it may be seeking an alternative route that may affect your stereo perhaps? One of these being a cheap investment may help. These are exactly the ones we use..... Hope this helps.... http://www.ebay.co.uk/itm/Ground-Loop-Isol...118wt_1197 If you go through life with your head in the sand....all people will see is an ar5e!! Treat every day as if it is your last....one day you will be right!!

16th Feb 2015 6:38pm

Venomator Member Since: 25 Aug 2014 Location: Peterborough Posts: 2087	^ ^ ^ Thank you Mal... Watching that one, as it isn't BIN but, jic, are any of the others listed as good, there is only the one of that specific listed... I didn't get around to it this last weekend, but plan to check it out next and will get one in any event...  Rog... The GREEN One... MY2016 Urban Truck Build Thread - http://www.defender2.net/forum/topic40548....al[/color]
16th Feb 2015 7:49pm

K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610

Evening Roger, As you can identify that the issue happens when the air conditioning is on you can perhaps negate the requirement of a ground loop isolator by ensuring your head unit and air conditioning is grounded/earthed at exactly the same point. This will ensure no potential difference between the two. Even if you have the time and inclination to slave in a temporary cable to test this suggestion out it will give you a pointer perhaps? In my work scenario the issue causing the interference can be two decks below and the GLI is simply a 'workaround.'  If you go through life with your head in the sand....all people will see is an ar5e!! Treat every day as if it is your last....one day you will be right!!

16th Feb 2015 8:11pm

Venomator Member Since: 25 Aug 2014 Location: Peterborough Posts: 2087	^ ^ ^ Gotcha Mal, thanks again, I guess I'll find out when I pull the thing out and check it...  Rog... The GREEN One... MY2016 Urban Truck Build Thread - http://www.defender2.net/forum/topic40548....al[/color]
16th Feb 2015 8:17pm

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