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lx200gps 12v power supply

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#1 fullotto

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Posted 24 September 2019 - 10:29 AM

hello,

 

need to know if a 5amp constant / 7 amp surge 12v power supply is ok to run my scope.

 

came across a Pyramid 12v supply model # PS-9KX ( was given to me free & brand new in box)

 

I have been using a Celestron power pak with no problems but was just inquiring about this power supply.

 

thnx



#2 BuckeyeNation

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Posted 24 September 2019 - 11:44 AM

I have a dedicated power supply that came with my LX200 8" GPS.  It is rated at 2.5 amps.  Have not as yet used it, I also use the Celestron power pak.  I believe the person who sold me the Telescope had bought it new with the scope.



#3 mdbradshaw

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Posted 24 September 2019 - 03:10 PM

The amperage makes no difference, so that's fine.

The problem is that power supply isn't 12V, it's "12V" meaning automotive voltage, which is really 13.8V (what your car produces while running).  I don't know if the Meade GPS scopes are so sensitive that 12 vs 13.8 would be a problem, but I'd make sure before using that one.



#4 decep

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Posted 25 September 2019 - 06:34 PM

The amperage makes no difference, so that's fine.

The problem is that power supply isn't 12V, it's "12V" meaning automotive voltage, which is really 13.8V (what your car produces while running).  I don't know if the Meade GPS scopes are so sensitive that 12 vs 13.8 would be a problem, but I'd make sure before using that one.

Looking at the Meade #07043 DC adapter (cigarette adapter), I doubt it has anything like a voltage regulator in it.  I seriously hope it has some overprotection components, like a TVS diode.

 

Automotive power is nasty business.  12V is spec, 14V is a nominal.  Transient voltage spikes >100V are also to be expected.  It is probably never a good idea to use a telescope with a car that is running or cranking while the telescope is plugged in.  (Modern cars might be a little better in this regard, but electronics are "automotive spec" for a reason.)



#5 john10906

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Posted 16 October 2019 - 05:26 PM

Is it safe to use the Celestron Power Tank on a Meade LX-200 ACF GPS?



#6 BuckeyeNation

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Posted 16 October 2019 - 06:27 PM

Yes, it is a 12Volt supply, so it is perfect.  That is what I use on my LX200 GPS.



#7 john10906

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Posted 16 October 2019 - 07:05 PM

Ok, thank you very much for the response.




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