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just an update, I tried making one of these as noted on a link, used the 12 ga wire etc, mine measured .046 milli henrys , also tried 2 of my small coils & made a "T" filter total of about .5 mh total, neither unit helped much with the whine but I found that when I flexed the plug on the radio upwards it made the noise come in louder & disappear depending on how much I flexed it so I replaced that plug on the adapter with the new one from the new stereo I bought & all is fine now without the filter.

Would still like to know if I am missing something on the wound coil as my inductance values are so different to the ones stated on earlier posts

Cheers

[QUOTE="slarty42, post: 363665, member: 24916"] just an update, I tried making one of these as noted on a link, used the 12 ga wire etc, mine measured .046 milli henrys , also tried 2 of my small coils & made a "T" filter total of about .5 mh total, neither unit helped much with the whine but I found that when I flexed the plug on the radio upwards it made the noise come in louder & disappear depending on how much I flexed it so I replaced that plug on the adapter with the new one from the new stereo I bought & all is fine now without the filter. Would still like to know if I am missing something on the wound coil as my inductance values are so different to the ones stated on earlier posts Cheers [/QUOTE]

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