THIS... see my just submitted response for the OCD amateur engineer's approach to creating a redundant return.
______________________ Clay Autery, KY5G On 6/27/2017 11:06 AM, Richard gillingham wrote: > Fuse BOTH leads at the battery... > 73 > Gil, W1RG > > > ------------------------------------------------------------------------ > *From:* Vic Rosenthal <[email protected]> > *To:* Clay Autery <[email protected]> > *Cc:* [email protected] > *Sent:* Tuesday, June 27, 2017 11:53 AM > *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 <[email protected] > <mailto:[email protected]>> 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, [email protected] > <mailto:[email protected]> 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 > >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] <mailto:[email protected]> > > This list hosted by: http://www.qsl.net <http://www.qsl.net/> > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] <mailto:[email protected]> > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
