[RFI] FW: Ignition Noise [Incident: 100111-000562]

[dgsvetan at rockwellcollins.com]

Gary,

It's no accident, but it is good news.  In reality, there are one or more 
hams employed in the EMC department of most of the major auto makers. I've 
had the privilege of meeting and knowing many of them over the years. 
After all, RFI/EMC and ham radio all "sort of" go together, even if in 
opposite directions!  BTW:  The concern extends beyond hams.  Keep in mind 
that at various times over the years, the Detroit "Big 3" have all been 
major suppliers of public safety vehicles, nearly all of which have 2-way 
radios aboard.  These days, the Ford Crown Victoria is a mainstay police 
vehicle, but I can recall the days when various Chevy and Dodge models 
were pre-eminent.  (Dodge was big-time in police vehicles in the 60's and 
70's.) 

I don't know the extent of HF compatability in Detroit these days, but I 
do know that for many years, several American-designed cars from the "Big 
3" were rated for at least 200 watts on-board RF in the HF spectrum.  In 
any event, YMMV with any given brand or model series, but at least some 
vehicles were/are reasonably ham-friendly. 

73, Dale
WA9ENA
Sr. EMC Engineer at Rockwell Collins

 



"Gary Smith" <wa6fgi at sbcglobal.net> 
Sent by: rfi-bounces at contesting.com
01/11/2010 03:31 PM

To
"David Jordan" <wa3gin at comcast.net>, <rfi at contesting.com>
cc

Subject
Re: [RFI] FW: Iginition Noise [Incident: 100111-000562]






Nice to know they admit we hams exist and are helpful with the reduction 
of RFI.
73, Gary...wa6fgi

  ----- Original Message ----- 
  From: David Jordan 
  To: rfi at contesting.com 
  Sent: Monday, January 11, 2010 12:39 PM
  Subject: [RFI] FW: Iginition Noise [Incident: 100111-000562]


  response.

 

    _____ 

  From: DX Engineering [mailto:dxengineering at dxengineering.com] 
  Sent: Monday, January 11, 2010 2:23 PM
  To: wa3gin at comcast.net
  Subject: Iginition Noise [Incident: 100111-000562]

 


  Recently you requested personal assistance from our on-line support 
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  Below is a summary of your request and our response.

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   Subject


  Iginition Noise


 


   Discussion Thread


   Response (Bob)

  01/11/2010 02:23 PM


  Hello Dave,

  Thank you for writing.

  I have attached a link to the Ford Mobile Radio Installation Guidelines:
  http://www.fordemc.com/docs/download/Mobile_Radio_Guide.pdf that should 
help
  you with your mobile installation and ignition noise reduction. The RFI
  Suppression Beads may help with your ignition noise. Often it is the 
fuel
  injectors that cause the ticking interference and beads have helped in 
some
  cases. Also, the coil or spark unit maybe treated with beads. Each case 
is
  different, so you will need to do some experimenting on mobile noise
  suppression. Bonding the engine and the hood to the frame with tinned 
copper
  braids may also help.

  The DX Engineering RFI Suppression Ferrite Snap Beads were designed to 
offer
  the best coverage of the high frequency range. They come in 2 
split-ferrite
  halves, in plastic case. So you can clamp them on any cable assembly. We
  have various sizes available for different cable diameters:
  http://www.dxengineering.com/Products.asp?ID=182
  <http://www.dxengineering.com/Products.asp?ID=182&SecID=152&DeptID=42>
  &SecID=152&DeptID=42. Larger sizes are capable of taking multiple turns 
of
  the wire or cable. Each doubling of the turns of wire through the snap 
bead
  increases the interference suppression by a factor of 4. However, it may 
be
  that in your situation, you need more than one bead per line.

  We appreciate your interest in our products!

  Regards, 

  Bob Hajdak - N8QE
  DX Engineering Customer Support
  dxengineering at dxengineering.com
  Orders 800-777-0703
  Tech Support 330-572-3200
  www.dxengineering.com


   Customer (David Jordan)

  01/11/2010 01:58 PM


  I am very interested in learning how using SNAP-ON Ferrite Beads will
  eliminate ignition noise in the Ford Sport Trac truck I drive. Where 
would
  I install the ferrite beads?



  Thanks,

  Dave

  Wa3gin


 


   Question Reference #100111-000562



  Date Created: 

  01/11/2010 01:58 PM


  Last Updated: 

  01/11/2010 02:23 PM


  Status: 

  Solved


  Order Number: 

 


  Phone or Fax Number: 

 


 

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