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Re: Don't be a Radio DPO!

To: "Dan Dwelley" <ddwelley@excite.com>,
Subject: Re: Don't be a Radio DPO!
From: Larry Macy <macy@bblmail.psycha.upenn.edu>
Date: Thu, 3 Feb 2000 10:54:13 -0500
I always heard either Piled Higher and Deeper or Push Here Dummy, But I 
like that one LOL

Larry

At this exact moment in time 2/2/00 4:09 PM, ddwelley@excite.com made the 
profound statement:

>Hmmmm "Phd"...Possibly Hostile Dolt? <G>
>
>Nothing personal to anyone...at least...not on this list.
>:o)))
>
>
>On Wed, 2 Feb 2000 12:41:27 -0600 , Feldman, Jack (Jack) wrote:
>
>>  For all the complaining about previous owners messing things up, I see
>that
>>  some folks are still recommending installing radios backwards by trying
>to
>>  isolate them from the car chassis. DON'T DO IT!
>>  
>>  First is the simple idea that it is stupid to do something you know is
>>  wrong. Even if you are willing to risk the potential short circuit, it
>won't
>>  work right. There is a reason for grounding the antenna.
>>  
>>  First the cars body acts as a counterpoise, which is necessary to good
>>  reception. In the good old days you had to have an actual connection to a
>>  ground. Things have improved, but not that much. You still need a second
>>  element besides the mast. My transmitter is grounded through an eight
>foot
>>  spike driven into the ground. (A friend of mine claims he has trained his
>>  dog to keep the earth around his ground rod moist to aid in
>conductivity).
>>  
>>  Secondly, cars generate a lot of noise. The ground and shielded lead is
>one
>>  way to keep the noise from coming in through the antenna lead. That
>doesn't
>>  eliminate alternator whine, or other interference from coming into the
>radio
>>  though the power leads, but that can be eliminated other ways.
>>  
>>  The right method? There are adapters that allow radios to be hooked up in
>>  reverse polarity situations. J.C. Whitney usually has them, but they go
>in
>>  and out of the catalog. They aren't in there now. I'm sure there are
>other
>>  sources, perhaps a look at Hemmings will help.
>>  
>>  Respect your car. Do it right!
>>  
>>  Jack, KA9HEL
>>  Bell Labs
>>  (I was going to add my PH.D., but it was someone who signed his messages
>>  with a Ph.D. that recommended the idea of isolating the radio. Having one
>is
>>  no gauge of universal knowledge, or any knowledge at all).
>>  
>>  J.
>>  
>>  
>
>
>Dan Dwelley
>77 Midget
>Alexandria, Va.
>
>
>
>
>
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Larry B. Macy, Ph.D.
macy@bblmail.psycha.upenn.edu
System Administrator/Manager
Neuropsychiatry Section
Department of Psychiatry
University of Pennsylvania
3400 Spruce St. - 1015 Gates
Philadelphia, PA 19104

 Ask a question and you're a fool for three minutes; do not ask a 
question and you're a fool for the rest of your life. 



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