 | Home > Technical > Radio interference |
 
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| kmac Member Since: 07 Oct 2009 Location: Middlesex Posts: 1309   
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Typically radio interference can come from unprotected USB products or even LED products.
If you have any of these try the rubber covered ferrite bead products on the offending items - disconnect all and then connect one by one to find the offending item or items If you want to be really nerdy you can build and put in a common mode choke. Shax here tells you how to do it https://www.defender2.net/forum/topic26844...mode+choke |
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18th May 2021 10:42am |
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| Scottratt Member Since: 18 May 2021 Location: Carlisle Posts: 7
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As far as I’m aware I don’t have any usb or led.
Would a surpressor be any good |
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18th May 2021 12:11pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
Radio interference when the engine is on. sound pitch change when increases you engine RPM
Radio interference with old unit you replaced |
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18th May 2021 12:55pm |
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| 90 Dreamer Member Since: 13 Jul 2019 Location: Oop North Posts: 2169 
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we had an issue with an aftermarket radio years back and after trying various 'fixes' I took the option to remove the radio and found it was simply very poorly connected........
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18th May 2021 3:25pm |
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| Scottratt Member Since: 18 May 2021 Location: Carlisle Posts: 7
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Yes when engine is on and does increase. I’ve bought it with it fitted so don’t know if it was the sa,e with a different radio |
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18th May 2021 3:43pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
alternator possibly but check your aerial grounding and radio power grounding
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18th May 2021 5:43pm |
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| Scottratt Member Since: 18 May 2021 Location: Carlisle Posts: 7
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When you say alternator do you mean it’s knackered and needs replaced
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18th May 2021 8:03pm |
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| PCM Member Since: 25 Jan 2019 Location: North East Posts: 875
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Can I ask what radio you are having the issues with and what if any aftermarket bits have you installed. Led bumper etc?
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18th May 2021 8:30pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
No it’s not knackered and no it doesn't needs replaced |
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18th May 2021 9:10pm |
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| Scottratt Member Since: 18 May 2021 Location: Carlisle Posts: 7
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So how could I fix prob,em please
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19th May 2021 8:27am |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
You need look at your 1. aerial grounding i.e. remove aerial from the wing and check aerial grounding corrosion
2. radio power grounding i.e. wiring and connectors make shore good sound connection 3. also check aerial coax cable that the screen and mid core are not shorted to the mid core or cores are not open CCT Last edited by dorsetsmith on 20th May 2021 1:07pm. Edited 2 times in total |
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20th May 2021 8:56am |
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| Scottratt Member Since: 18 May 2021 Location: Carlisle Posts: 7
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Thanks
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20th May 2021 9:40am |
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