[TR] Accessory power in +ground TR3

[Chris Simo]

Here is an isolated receptacle I have in my TR2 (still positive ground both
leads fused.

 http://amzn.com/B000WEMH4G




On Thu, Mar 12, 2015 at 5:51 PM, Randall <TR3driver at ca.rr.com> wrote:

>  I assume you're talking about the case where the car is still positive
> ground?
>
> I'm sure it could be done.  Sure would be a lot simpler and easier (and
> less chance for disaster if east should meet west) to just convert the car
> to negative ground, though.
>
> There would be no need to completely isolate the secondary negative ground
> system from the body (most radios have a ground path through the antenna
> mount anyway).  You could just connect the negative side of the secondary
> battery to ground.  There is also nothing needed at the point you have
> marked "regulator or control box", unless perhaps you want to put in a
> master switch or add a connector for the trickle charger.
>
> You could even setup an isolated DC-to-DC converter to charge the
> secondary battery from the main battery.  (And if it had enough capacity,
> even eliminate the battery entirely).
>
> Yet another option (though not one I would particularly recommend) is to
> just install outlets wired negative ground, isolated from the body.  As
> long as your computer, GPS, etc don't touch bare metal in any other way,
> that will work fine.  Watch out for the radio, though, many of them have
> paths to ground through both the case and the antenna, even if they do have
> separate ground leads.
>
> -- Randall
>
>
>  ------------------------------
> *From:* Triumphs [mailto:triumphs-bounces at autox.team.net] *On Behalf Of *Carl
> TR
> *Sent:* Thursday, March 12, 2015 2:32 PM
> *To:* Triumphs at autox.team.net
> *Subject:* [TR] Accessory power in +ground TR3
>
>  Has anyone installed a second battery (-ground) to power accessories in
> a TR3?   I am planning a fairly lengthy road trip this summer and would
> like the benefits of GPS, phone charger, and maybe computer hookup.
>
>
>
> I am wondering if it is possible to create a completely closed wiring
> setup for that purpose using a smaller motorcycle or marine battery.  It
> would require charging periodically (or a trickle charger) and be
> completely insulated from the body/frame.
>
>
>
> What would I need between the battery and accessory outlets (besides a
> fuse box)?
>
>
>
> Any thoughts or suggestions?  (or is it even possible?)
>
> Thanks
>
>
>
> Carl
>
> 1961 Triumph TR3A – TS81802LO
>
> http://mysite.verizon.net/cfmtr3a/  - Verizon has discontinued the mysite
> URL.  Looking for a new home.
>
> Tampa, FL
>
>
>
>
>
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