[Elecraft] OT: 2017 Chevy Silverado 1500 power outlets

[Eric Swartz - WA6HHQ, Elecraft]

Done! :-)

73,

Eric
elecraft.com
_..._



> On Jun 27, 2017, at 10:09 PM, Hisashi T Fujinaka <htodd at twofifty.com> wrote:
> 
> Yes. Rental car in Mexico, bumpy roads, and no strap to hold the battery
> in place. Just heard it yesterday.
> 
>> On Tue, 27 Jun 2017, Charlie T, K3ICH wrote:
>> 
>> I have to ask, has ANYONE ever heard of a circumstance where the negative
>> return lead from the battery to the engine block has ever failed, short of a
>> battlefield situation?
>> Still, probably a good idea to fuse the negative to radio wire anyway.
>> 
>> Charlie k3ICH
>> 
>> 
>> 
>> -----Original Message-----
>> From: elecraft-bounces at mailman.qth.net
>> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Vic Rosenthal
>> Sent: Tuesday, June 27, 2017 11:52 AM
>> To: Clay Autery <KY5G at montac.com>
>> Cc: elecraft at mailman.qth.net
>> Subject: Re: [Elecraft] OT: 2017 Chevy Silverado 1500 power outlets
>> 
>> I don't think math or difficult physics is needed. Suppose you connect the
>> radio directly to battery, and then suppose the battery to ground cable
>> becomes partially or completely disconnected. Finally, suppose you then try
>> to start the engine. When the starter solenoid closes, some of the high
>> current from the battery negative terminal flows through the negative lead
>> to the radio, and then to ground through the radio's mounting bracket, the
>> coax to the antenna, etc. The no. 10 ground wire might have to carry several
>> hundred amps! Lots of things can be damaged.
>> This is why negative leads should be fused, at least.
>> 
>> Vic 4X6GP
>> 
>>> On 27 Jun 2017, at 18:21, Clay Autery <KY5G at montac.com> wrote:
>>> 
>>> Horse puckey!  I DEFY you to prove the physics OR math of that
>>> ridiculous statement.
>>> 
>>> ______________________
>>> Clay Autery, KY5G
>>> 
>>>> On 6/27/2017 9:55 AM, donovanf at starpower.net wrote:
>>>> WARNING!
>>>> 
>>>> 
>>>> For extremely important safety and fire prevention reasons reasons,
>>>> no accessory should ever be connected directly to the negative
>>>> terminal of an automotive battery . Just like when charging an
>>>> automotive battery, the negative lead of a cable running directly to
>>>> the battery should always connect to the engine block and never
>>>> directly to the battery.
>>>> 
>>>> 
>>>> The positive lead must be fused where it connects to the battery.
>>>> 
>>>> 
>>>> There's an excellent discussion here:
>>>> 
>>>> https://www.w8ji.com/negative_lead_to_battery.htm
>>>> 
>>>> 
>>>> 73
>>>> Frank
>>>> W3LPL
>>>> 
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> 
> -- 
> Hisashi T Fujinaka - htodd at twofifty.com
> BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee
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