[TenTec] TenTec Digest, Vol 51, Issue 8

[Gary Hoffman]

Yes....a single inverter properly sized and thus with a reasonable load is
most efficient.


----- Original Message ----- 
From: "Dr. Gerald N. Johnson" <geraldj at storm.weather.net>
To: <tentec at contesting.com>
Sent: Tuesday, March 06, 2007 8:56 PM
Subject: Re: [TenTec] TenTec Digest, Vol 51, Issue 8


> On Tue, 2007-03-06 at 19:01 -0500, Gary Hoffman wrote:
> > Agreed, you could run everything on 12 volts.  That would work for many
> > common situations.
> >
> > It would not work for my setup with scanners and commercial radios and
> > computers, and....well you get the idea.
> >
> > 73 de Gary
> >
> Hmm, the wall warts for my scanners put out 12 volts DC.
>
> Laptops can be run from 12 volts with reasonably priced 12 to 18 volt
> step up supplies.
>
> Desktop computers could be run from 12 volts, though the current may not
> be compatible with 18 gauge power cords. With th computer supply being a
> switching supply, there is no fundamental reason it couldn't be designed
> to run from 12 to 14 volts instead of 280 volts except that the switched
> current has to be 20 times as large.
>
> Individual 120 volt items may have to be run through an inverter, but if
> the converter is customized to the load each supplies, the system
> efficiency should be far better than running an assortment of part time
> loads on a single inverter with the power to run the peak assortment of
> loads. An inverter output section takes the same drive and control power
> whether loaded or not and that's a significant part of its inefficiency.
>
> -- 
> 73, Jerry, K0CQ,
> All content copyright Dr. Gerald N. Johnson, electrical engineer
>
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