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From: "Dennis O'Connor"
Subject: Re: (Avionics) How can this circuit produce an "inductive surge"?
Date: Fri, 27 Sep 2002 08:57:29 -0400
Organization: Posted via Supernews, http://www.supernews.com
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
As a ham radio operator I have radios in my vehicles that are wired directly
to the battery and are left turned on 24/7 with multiple engine starts and
shutdowns per day... In recent decades, the radar detector is also left on
24/7... In over 40 years of mobile ham radio operations I have never had
radio damage, none of my fellow hams have ever had radio damage, that I am
aware of, attributable to the generator (in the early days) or alternator in
Tens of millions of vehicles are on the roads every hour of the day and
night... When is the last time you saw a vehicle with its electronics ruined
due to alternator run away? (not heard about third hand from some guy -
actually have laid your own eyes on) Given the hundreds of thousands of
vehicles you have passed on the roads in your lifetime you would have had to
personally seen them if they were statistically likely... You haven't...
Old wives tales, never seem to die..
"Peter Gottlieb" wrote in message
> Many cars shut off all "accessory" loads during start. There are two good
> reasons I can think of for this:
> 1) Reduces battery drain during cranking to maximize cranking speed.
> 2) Reduces chances of damaging spikes getting to sensitive electronics.
> "Tarver Engineering" wrote in message
> > "Dennis O'Connor" wrote in message
> > news:firstname.lastname@example.org...
> > > Yes... Common knowledge is commonly wrong... The alternator cannot
> > away
> > > during engine cranking and fry the electronics... Leaving the radios
> > > during engine start up and shut down involves no more risk of
> > > than at any other time or point in flight... on
> > a
> > > small battery at a critical time>
> > In fact, all three electronic dash automobiles I have owned switch out
> > "avionics" when starting.
> > John
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