Re: GSM Speaker Interfence (Was: Re: AT&T raises unlisted numberfee by 350-600%) SMS wrote:
> Jer wrote:
>
>>> According to the article, the way to avoid this problem is to switch
>>> to Verizon or Sprint (or one of the other CDMA carriers).
>>
>>
>> ...or install shielded speaker cabling and shielded speakers with
>> proper grounding of the shield. Viola!
>
> It's pretty impractical to expect people to start disassembling their
> vehicle in order to install shielded speakers and cable, and it won't
> have any effect on vehicle speakers. It's coupling into the RF or IF
> section of the radio receiver, not into the speakers or the speaker wiring.
>
> For amplified computer speakers, it might help to use shielded cabling
> and shield the enclosures.
>
> It's much simpler to attack the source of the problem, than to use these
> band-aid solutions.
I've never noticed the problem in a car, but I did when near my nephew's
PC - which got the shield fix for $2. As far as the car is concerned,
my figures put the IF on the lower end of the FM band, if it happens at
all. The nephew's car radio must be better shielded than others, and
given that, may use shielded speaker cables too.
--
jer
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