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Tip Polarity of the "DC" cord for an AP Mach 1

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#1 BarrySimon615

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Posted 21 July 2019 - 09:13 PM

I just got an AP Mach 1 and it is beautiful and innovative.  It is a 2011 model which was never used.  Complete with the Eagle tripod/pier and extra pier sections.  But, the dc cord to connect it to a battery is not among all the parts I got.  I will order a replacement but I would like to run the mount thru it's paces and it appears that the cords I have with both a Celestron AVX and CGem will work.  The fit seems to be good, the screw down attachment does not mate up, but for testing purposes that is not a big deal.

 

What is a big deal is the polarity of the attachment.  The Celestron cords are "Positive" tip, I think it is likely that this is the correct polarity for plug into the AP control box, but before I do, I need to make sure.  Comments please.

 

Barry Simon

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Edited by BarrySimon615, 21 July 2019 - 09:20 PM.


#2 Richard O'Neill

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Posted 21 July 2019 - 09:49 PM

You assume correctly, tip positive.



#3 dmdouglass

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Posted 21 July 2019 - 10:38 PM

Do you have the manual ?

Or is there a copy online ?

 

If so, i would check to be sure.



#4 Bowman

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Posted 21 July 2019 - 11:27 PM

Most of us have moved on to a GTO-CP4 which has a different power plug. If you need to know the polarity of the GTO-CP3 power plug, call A-P and either George or Howard can give you the answer.

 

Larry Hoffman, M.D.



#5 orlyandico

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Posted 22 July 2019 - 04:23 AM

I have a CP3. It is center positive (I use all manner of power supplies, and even a lithium-ion power bank with a 12V output).



#6 BarrySimon615

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Posted 22 July 2019 - 07:13 AM

Thanks for the answers. It is a CP3 and the answer is not addressed in the manuals.

Barry Simon

#7 CharlesW

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Posted 22 July 2019 - 10:16 AM

There is nothing in this hobby that is negative center. 



#8 BarrySimon615

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Posted 22 July 2019 - 01:49 PM

There is nothing in this hobby that is negative center. 

Perhaps not now but there was in the past.  The RA drive only hand controllers for the Celestron Polaris and Super Polaris mounts in the 1980's had negative tip cords.  I witnessed one and I heard of several hand controls frying when they were hooked up inappropriately.  Due to experiences and memories like that it never hurts to verify.

 

Barry Simon




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