12-24 vdc converters and toroid cores

[Edward B Richards]

Michael;

You did ask for any thoughts from anyone, so here is mine. I have done
this successfully. Install another 12 volt battery. It can be smaller,
like the 18AH they use in scooters. Using relays have both batteries in
parallel when not using the radio for charging. When using the radio flip
a switch that puts them in series with the small one on top. Since only
your radios will be connected to the small one you don't need to worry
about starting current, etc.

Ed   K6UUZ
 
On Mon, 5 Oct 2009 13:12:31 -1000 Michael Tauson <wh7hg.hi at GMAIL.COM>
writes:
> Most civilized civilian vehicles have 12 volt electrical systems 
> these
> days.  Much of the surplus I'd like to use aboard my all to 
> civilized
> Jeep requires 24vdc.  Building a small but mighty astable
> multivibrator to handle the primary and an appropriately wound
> secondary aren't a problem.  Where I do have a question or 
> seventeen
> is core material - and size, for that matter.
> 
> I know some materials are expressly for power transformers but is
> there any particular reason about any material can't be used for 
> this
> application?  Frequency shouldn't be an issue but are there 
> materials
> that might not like being in the presence of the currents that will 
> be
> presented?  Aside from needing space to feed the wires through, are
> there any size requirements of note?
> 
> I've read what I could find on the web.  Maybe the meds are messing 
> me
> up (They do that, you know.) but I couldn't find anything that
> addressed these questions.
> 
> ANy thoughts anyone?
> 
> BEst regards,
> 
> Michael, WH7HG
> -- 
> http://www.nationalmssociety.org/chapters/NTH/index.aspx
> http://wh7hg.blogspot.com/
> http://kludges-other-blog.blogspot.com
> Hiki Nô!
> 
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