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[aprssig] Generators and LPG Conversion (was APRS in NOLA)

Ray McKnight shortsheep at worldnet.att.net
Sat Sep 3 02:28:50 UTC 2005


You can also use a wind generator that is "self furling".
I believe "Ampair" is the brand I was thinking of, that
is designed to automatically prevent over spinning
beginning at something like 45mph.

They are a little smaller than most blades, and don't
produce quite as much current as some, but it's a good
choice for unattended locations.

----- Original Message ----- 
From: "VE7GDH" <ve7gdh at rac.ca>
To: <aprssig at lists.tapr.org>
Sent: Friday, September 02, 2005 11:59
Subject: RE: [aprssig] Generators and LPG Conversion (was APRS in NOLA)


> Gervais VE2CKN wrote on 02/09/2005
>
> >  i just installed a Digi in a remote site that need
> > emergency power in case of,,,,,
> >
> > actually i have battery back up in the 120vac would break,
> > my question is: anyone have a diagram of How to built a
> > windcharger blade could be interpreted as off topic ,
> >
> > this way i would install it and be independent of electricity,
> > i already have a 24 vdc alternator
>
> Sorry, don't have any diagrams for chargers. I would say go ahead build a
> wind generator if your site gets enough wind, but perhaps install solar
> panels as well as the wind generator. Ice can cause problems for
generators,
> but wind can also keep it turning at night. Solar panels won't put out as
> much in winter, and snow on them can block the sunlight in winter if you
> don't have a heater on the solar panel to periodically warm it up so the
> snow can slide off. However, it just seems like it would be a good
> combination to have both.
>
> I did a search for "wind generator, voltage regulator" at google.ca. One
> site www.otherpower.com/otherpower_wind_tips.html suggested "load
> shedding" where you don't use any voltage regulation, but add a load to
the
> circuit when the voltage rises to the desired voltage. By adding a load
> (heater?) on the generator, it will help prevent the generator from
turning
> too fast and destroying itself.
>
> This site www.fieldlines.com/story/2003/11/4/122453/226 suggests NOT
> using an automotive voltage regulator as it would REMOVE the load from
> the generator when the battery was charged. Again, it comes down to the
> generator spinning at an uncontrolled rate unless you have a means of
> slowing it down, furling it (turning it), applying a brake to it, or
adding
> a load to it. A heater seems like the appropriate load in winter to help
> keep the equipment warm. In summer, you might want to have the load
> outside the enclosure so you don't heat the equipment up.
>
> See www.fieldlines.com/story/2003/7/18/8715/42490 (link from the above
> site) for more information about adding loads to help keep the voltage
down.
>
> Using a TNC that draws very little current would be a good idea. A nice
> addition would be the ability to drop the output power on the radio if the
> voltage dropped below a certain point, or even shut it down temporarily so
> the battery would have a chance to charge if the voltage was too low to
> operate the radio.
>
> 73 es cul - Keith VE7GDH
> --
> "I may be lost, but I know exactly where I am!"
>
>
>
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