· Get a Cloudy Nights T-Shirt · Submit a Review / Article Click here if you are having trouble logging into the forums Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Equipment Discussions >> Mounts Previous   Index   Next   Threaded   Pages: 1 Make-it Better super member Reged: 06/30/07 CGE power connection       #4396003 - 02/18/11 10:11 PM Edit   Reply   Quote Quick Reply   Does anyone know for certain if the CGE power connection is "center positive" or "center negative"? Thanks in advance, Roy Post Extras:       mclewis1 Thread Killer Reged: 02/25/06 Loc: New Brunswick, Canada Re: CGE power connection [Re: Make-it Better]       #4396004 - 02/18/11 10:13 PM Edit   Reply   Quote Quick Reply   Absolutely center positive, and the dimensions are 2.1 x 5.5mm Post Extras:       Make-it Better super member Reged: 06/30/07 Re: CGE power connection [Re: mclewis1]       #4396006 - 02/18/11 10:15 PM Edit   Reply   Quote Quick Reply   Thank you very much Mark. Roy Post Extras:       SkipW sage Reged: 02/03/11 Loc: Oklahoma, USA Re: CGE power connection [Re: mclewis1]       #4422697 - 03/02/11 11:20 PM Edit   Reply   Quote Quick Reply   Thank you for the exact info, Mark. I presumed that the same connector was also used to power the Celestron CG-5 Advanced series mount, and it is. I looked for that size connector on the Radio Shack website and saw it's an enercell size 'M' Adaptaplug Tip (273-344). With their Car Power Adapter (270-048) it works a treat on the CG-5. With your exact dimensions, I knew precisely what to look for. I couldn't get the stock DC power cable to work at all with a 7 Ah 12V power pack I picked up from Walmart. Naturally, I thought it was a problem with that cheap power pack, but the included cable didn't work with my (not cheap) car power outlet, either. The CG-5 worked perfectly with a Celestron AC adapter, so I knew it wasn't a problem with the mount itself. Replacing the Celestron 12V cord with the combo from RS, the CG-5 works well. After successfully trying the replacement DC adapter, I measured the resistance of the supplied adapter... 6 Ohms on the positive lead and 5 Ohms on the negative! Yikes! No wonder it didn't work! The new RS plug cord and tip measures much less than one Ohm on each side. I just noticed that the Adapter packaging has a sticker on it that says that one Adaptaplug Tip is included in the $12.99 price... neither I nor the clerk noticed this in the store. Now to see if I can get my $6.99 retail for the 'M' Tip back. [Edit] They cheerfully refunded the $6.99 plus tax today. Edited by SkipW (03/04/11 12:09 AM) Post Extras:       Arbacia Pooh-Bah Reged: 04/18/07 Loc: Madrid, Spain Re: CGE power connection [Re: SkipW]       #4423343 - 03/03/11 09:26 AM Edit   Reply   Quote Quick Reply   Center + If inverted, simply doesn't work. No damage as it is protected. Check the volts of the power suply. Some 12v power suply are not 12v output but 15-16v for charging 12v batteries. Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 21 registered and 44 anonymous users are browsing this forum. 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