[aprssig] 12V wiring ideas

[Curt, WE7U]

On Sat, 29 Oct 2011, KBØNLY wrote:

> That’s what I was just going to say, couldn't have happened as described with 
> a negative ground.
>
> Scott
>
>
>
> -----Original Message----- From: DALE
> Sent: Saturday, October 29, 2011 7:13 PM
> To: TAPR APRS Mailing List
> Subject: Re: [aprssig] 12V wiring ideas
>
> in that case there was a piece of pos gnd equipment installed.
> dale

I don't believe that was the case, but that was a long time ago.  I believe the 1st car was either a Plymouth Fury I or a Ford Pinto Station Wagon (probably the latter).  The 2nd car was a Plymouth Fury III.  These cars were stock.

What I thought I figured out a few years later was that there must have been a loose ground (From the engine to the chassis?  Chassis to battery?), so the starter current tried to return via a different path.  Could there have been potential between the antenna ground and the metal dash?  That would have caused current to flow through the radio's ground.

-- 
Curt, WE7U.        http://www.eskimo.com/~archer
APRS Wiki:  http://info.aprs.net/