T&T: Sine vs Modified Sign Wave Inverters

[Jeff Bacon]

Neophyte warning !!

If the adapter converts from AC to 18v DC, how would it run off a 
plug-in 12V cigar adapter ?
Jeff

John Owen wrote:

>Jeffery, et al-I am at that point of deciding how to power the HP DV 1000
>laptop we will use while underway. I have been told that the HP supplied AC
>adaptor (converts to the needed 18vDC) will work fine with a MSW inverter
>(just installed to power several items, including the laptop).. Is this not
>true?, or it will cause damage over time? How long- weeks, months, years??
>Would we be better off using a standard 12v automobile transformer and plug
>it into a 12vDC source on-board to power the laptop?  All this in an attempt
>to not run the generator just to make ice and power the laptop; any ideas
>will be welcomed.
>
>Thanks,
>John Owen
>CHB 41
>Jacksonville, FL.
>
>-----Original Message-----
>From: trawlers-and-trawlering-bounces@lists.samurai.com
>[mailto:trawlers-and-trawlering-bounces@lists.samurai.com]On Behalf Of
>Jeffrey Siegel
>Sent: Monday, December 04, 2006 1:17 PM
>To: 'Ken Ongemach'; trawlers-and-trawlering@lists.samurai.com
>Subject: Re: T&T: Sine vs Modified Sign Wave Inverters
>
>  
>
>>...I will say that there is
>>NO advantage in one over the other...
>>    
>>
>
>There is a whole class of power supplies that will not work with a modified
>sine wave inverter.  Most of the newer HP color printers use this type of
>power supply as an example (there are many other examples too).  Plug the HP
>printer in and it won't turn on.  Get a cheap, true sine wave inverter and
>it works perfectly.
>
>In addition to this, there is a known reduction of life issue with many
>other power supplies when fed from a modified sine wave inverter.  Laptop
>supplies seem to be especially susceptible to this.  The little laptop brick
>power supplies won't last as long when they are plugged into a modified sine
>wave signal.
>
>In most cases, a modified sine wave inverter will do everything that most
>people need on their boat.
>
>Except when it won't...
>
>================
>Jeffrey Siegel
>M/V aCappella
>DeFever 53PH
>W1ACA/WDB4350
>Castine, Maine
>_______________________________________________
>http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering
>
>To unsubscribe send email to
>trawlers-and-trawlering-request@lists.samurai.com with the word
>UNSUBSCRIBE and nothing else in the subject or body of the message.
>
>Trawlers & Trawlering and T&T are trademarks of Water World
>Productions. Unauthorized use is prohibited.
>_______________________________________________
>http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering
>
>To unsubscribe send email to
>trawlers-and-trawlering-request@lists.samurai.com with the word
>UNSUBSCRIBE and nothing else in the subject or body of the message.
>
>Trawlers & Trawlering and T&T are trademarks of Water World
>Productions. Unauthorized use is prohibited.
>
>  
>

-- 
Jeff
39.42.411 N
82.59.444 W