[Mobile-Portable] First step to cure engine noise?

Mon, 21 Apr 2003 08:26:21 -0600

Scott,
I have a 2002 Chevrolet 2500HD Crew Cab Truck that I installed a
Icom-706MKII into.
I have a second battery installed through an isolator and the radio is
connected straight to this
battery.
I had some alternator whine when I first installed it as well as some
ignition noise.
To get rid of the alternator whine, I installed ground braid from the radio
main unit to chassis ground
and then from chassis ground to the engine block where the battery ground
was.
For the ignition noise, I have the coil per cylinder setup, I installed
clamp on ferrite cores on each plug wire.

Make sure that the radio is grounded good. I have heard of people putting
ground straps on all door hinges,
hood and trunk hinges, tailpipes, and chassis. This would be a good starting
point.
Good luck,
Tom
K5TEE

----- Original Message -----
From: "Scott Neader KA9FOX" <[email protected]>
To: <[email protected]>
Sent: Sunday, April 20, 2003 11:08 PM
Subject: [Mobile-Portable] First step to cure engine noise?

> Hi All!
>
> I have an IC-706 in a 1997 Chevy Tahoe, with a Hi-Q-Antennas 3/80 mounted
> on the hitch-mount.
>
> Anyway, the problem is:  engine noise (engine whine)
>
> The Noise Blanker is pretty good in the 706, so I've avoided trying to
cure
> the problem, but there are issues with the NB as you probably
> know.  Distorts when there are nearby loud signals, etc.
>
> What is the first, easiest step to try to reduce engine noise/whine, that
> you have found to be successful?  Any owners of 1997 Tahoe (or Surburban
or
> Yukon) with tips to share?
>
> Please reply directly and I'll summarize back to the group if there is
> enough information to share.
>
> Thanks & 73!
>
> ---------------------------------------------------------------
> Scott Neader KA9FOX   (608)788-1234 / FAX (608)787-0100
> Free Ham Radio Classified Ads:  http://swap.QTH.com
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>
>
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