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blueman
Vendor Blue Sky Accessories


Reged: 07/20/07
Posts: 4303
Loc: California
Re: How do You power Your mount ? new [Re: mnaf]
      #3033413 - 04/09/09 02:45 AM

Inverters are not efficient, they use a lot of current to make 110v ac from 12v dc. It is best to use a converter that does dc to dc from 12v to whatever volt you need.
I use one for my laptop that makes 18v and one for my mount that makes 18v and one for my camera that is also 18v and they do not use as much power as a 400watt inverted that I tried to use.
You can find dc to dc converters pretty cheap on line, usually made to run laptops or other things. If needed, you replace the plug to match the device you are using.
Blueman

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14.5" Starmaster with ServoCat and Argo Navis
1966 Unitron 4" Model 152 EQ
Tec 140
TV NP101 f/5.4 APO Telvue .8 Focal Reducer
FLI ML8300 and CFW-2-7 filter wheel
Astrodon Gen2 RGBL 2" filters
Baader 2" Narrow Band Filters
Borg 50mm Guide Scope/ATIK Titan Guide Camera
AstroPhysics AP900
Losmandy GM-8 Gemini


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Fortune07
super member


Reged: 06/17/08
Posts: 159
Loc: Adirondack Mountains, Upstate ...
Re: How do You power Your mount ? new [Re: blueman]
      #3033508 - 04/09/09 05:56 AM

How old is the battery? 400 watts is a lot you don't really need that big an inverter. Most laptops only use about 60 watts and the rest of your equip uses even less. WiFi dosen't make a diff. Maybe a smaller inverter would be the way to go.

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Jeff
Upstate NY (Adirondack Mts.the real upstate)

Orion XT10 Classic Dob (the Yard Cannon)
AstroTech AT8IN, w/Moonlite motorized focuser
AstroTech AT6RC
Williams Optics Megrez 72 FD Doublet APO
Orion 4.5" imaging Newt
Atlas EQ w\EQMOD
Losmandy G11 w/Gemini II
SBIG ST8300m
Starlite Express USB Filter Wheel
Atik 16IC-S mono(guide camera)
Badder 2" LRGB filters
Astronomics 2" L,Ha,SII,OIII


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Arbacia
Pooh-Bah


Reged: 04/18/07
Posts: 1057
Loc: Madrid, Spain
Re: How do You power Your mount ? new [Re: blueman]
      #3033525 - 04/09/09 06:15 AM

At home I use a 220v/12V 2A transformer. In countryside I use spare 36Ah sealed batteries rejected from a disabled scooter we have in the family. Not full power, but every year I replace two of them. Besides of that I have enought power for several nights of observation.

Patricio

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LightBridge 12", LB16", 70īs C8, C11. CGE.
Set of Takahashi LE EPs; Ethos; DMK 31AF03.AS
CN image gallery
http://www.astrohenares.org
http://www.asociacionhubble.org
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PhilCo126
Pooh-Bah


Reged: 01/14/05
Posts: 2754
Loc: coastline of Belgium
Re: How do You power Your mount ? new [Re: Arbacia]
      #3033854 - 04/09/09 10:37 AM

Nice upgrade Don, but what does the new combination weigh ?

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TS 130/912 (f 7.10) Triplet Apo Refractor
TS 152/1200 (f 7.90) Achromatic Refractor
Astrologers say the future is written in the stars but Astronomers know this more so applies to the past...
http://www.flickr.com/photos/72473941@N03/


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Dubboy
Carpal Tunnel


Reged: 07/05/05
Posts: 2398
Loc: Western Kentucky
Re: How do You power Your mount ? new [Re: PhilCo126]
      #3034628 - 04/09/09 05:39 PM

Quote:

Nice upgrade Don, but what does the new combination weigh ?



I'm guessing about 10-15 pounds. The handle makes it manageable

--------------------
Don

"Don't worry about what telescope you own, or its quality. Just get out under the night sky and enjoy God's wondrous universe" Thomas Back.






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