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

[Doc]

> 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