[TVI-RFI-EMI] Re: Mobile interference.

Sun, 13 Jan 2002 20:49:00 -0500

I have similar noise on the Am radio portion
of the high-end stereo radio in my 1998 BMW 540i.

At 11:54 AM 1/9/2002 -0500, Doc wrote:
>> I use my FT 817  and other rigs in various  vehicles so I have built a
>> small 1.2ah gel battery into a box , with a reverse polarity diodes
>> and a line ferrite ring/ capacitor  line filter on the fused  input.
>
>Can you share what specific devices you used, please?  I would like
>to duplicate your setup.
>
>> This allows me to  safely plug in via the lighter socket  and the supply
>> to the rig holds up when you start the vehicle .  It  provides power in
>> those vehicles where the lighter socket powers down when the ignition
>> is off and acts as a good filter when taking power via the  cars wiring
>> loom, rather than straight from the battery   + saving my nicads .
>
>Excellent!
>
>> I just have one problem to cure .
>> My Landrover Discovery  kicks out electrical  (mechanical?)  hash at any
>> speed over 5mph  and it builds to S8  with speed - I think it must be
>related
>> to the  Speedo as there is nothing when stationary , tick over or revving
>the engine
>> Such a shame its a diesel engine too!
>> Noise blanker on the SGC2020 copes better than the FT817 with this
>problem.
>> Richard G3UGF ,
>
>I am seeing the same in my 1991 Chevy Astro van so will be interested in any
>solutions.
>
>I have taken the liberty of copying this to the TVI-RFI-EMI list.
>
>73, Doc  KD4E
>
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