[Mobile-Portable] More noise cures

[N1KHB at aol.com]

Well Earl, as I stated in previous posts, they do - or at least did when I  
needed it. Just ask and see what happens. If they can help, they will. If 
they  can't, then look elsewhere. It's worth a try, no? And ARRL probably has 
contact  info even if the local dealers are scratching their collective 
heads.
 
Best,
Sonny N1KHB
 
 
 
 
In a message dated 1/19/2014 2:26:45 P.M. Eastern Standard Time,  
earl.kd5xb at gmail.com writes:

Seems  like Ford should have a procedure to make the vehicle useable for
public  safety, utilities, etc.  If you were to ask the right person,  you
could probably avoid a whole lot of trial and error.
Vy 7  3
Earl
KD5XB



On Sun, Jan 19, 2014 at 11:52 AM,  <N1KHB at aol.com> wrote:

> Randy and all,
>    I  just plugged in a search phrase of "fuel  injector electrical  noise
> radiation" and received enough potentially useful  returns  that it 
appears
> hopeful that some of the authors might have some   experience. I didn't 
read
> any, but the titles suggest  promise.
>    And just off the top of my head, I'm   thinking back to my electronics
> experience. One of my solenoid  (an  injector is a solenoid, right?)
> projects
> which  radiated unacceptably was tamed  with ceramic bypass caps. Think
>  risetime and thus bandwidth reduction here.  And way back in tech  school
> we were
> told that connecting reverse biased  diodes  across relay and solenoid 
coils
> never hurt and usually  helped. The coil  resonates when power is removed
> abruptly and  the first reverse alternation is  greatly suppressed by the
>  diode
> becoming forward biased in that phase thus  quickly killing  the noise
> burst.
>    I don't know if vehicle  companies have either, or  any, such
> suppression. Something to  investigate I suppose.
>
> Best,
> Sonny  N1KHB
>
>
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