[Icom] Mobile Noise Supression - Final Chapter

[Harry Tankin]

Doug,

Been there with a 95 Merc Sable..

Some years ago QST had a feature article on EMI issues associated with 
mobile installations.  The article included contact information for 
just about every automotive manufacturer.  You may want to give that a 
try.  Local dealers for most part don't want / can't be bothered.  
However, I recall some of the manufacturers had to address some of 
these concerns..so try to find the article and possibly contact Toyota 
USA for tech assistance.

Believe the article was from the early to mid-1990s.

Harry WE1X



----- Original Message -----
From: "Davies, Doug A FOR:EX" <Doug.Davies@gems3.gov.bc.ca>
Date: Tuesday, October 8, 2002 4:20 pm
Subject: [Icom] Mobile Noise Supression - Final Chapter

> As some of you may remember, back in August I posted a plea for 
> help to
> solve the vehicle noise problem(s) with my IC-706MKIIG 
> installation a 2001
> Toyota Tacoma V-6 pickup.  I thought I would post a follow-up, for 
> thosethat may be interested.
> 
> From all of the replies I received, I tried out all of the 
> suggestions to
> solve the problem(s).  To date, these have included:
> 
> Power to rig goes directly to battery with fuses in both lines, 
> both lines
> have snap-on ferrite beads.
> Bonded all body parts to the frame
> Bonded engine block to the frame
> Bonded exhaust pipe to the frame
> Put large value cap (40,000uF@100V) across alternator terminals.
> Put filter in pos. alternator line
> Put filters in both lines of the fuel pump
> Put large snap-on ferrite bead on wire bundle exiting main computer.
> Put snap-on ferrite beads on both ends of antenna coax.
> Put ferrite beads on both ends of antenna adjustment power cable.
> Checked that spark plug wires are silicon low emmision type - they are
> Checked that plugs are resistive type - they are.
> Went to Toyota dealer and asked if they could help me troubleshoot 
> - they
> basically told me to "stuff it".
> 
> So, the bottom line here is I've given up.  As I see it I have three
> choices, put up with the constant S-7 noise level, pull over and 
> stop if I
> want to have a QSO or tear out the whole damn installation and 
> sell the
> equipment.  I have run out of ideas and suggestions to try.  If 
> some has or
> knows someone who has a similar installation in a Toyota, and they 
> havesolved the noise problem, please let me know how it was done.  
> 
> And, If you are considering operating mobile in that new vehicle 
> you'replanning to buy, don't buy a Toyota pickup.
> 
> Doug  VA7DD 
> 
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