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Atari CO18187 5200 power supplies volt output


tjlazer
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I have two Atari 5200 CO18187 A/C adaptors. One seems to be a newer one. Looks like the Atari 1050 styling. Says CX-5200 only on the back. Outputs 13.4V. Another older style, puts out 14V! Are these going bad? The CX-5200 is brand new never used.

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No...14volts from an unregulated DC power supply is pretty normal. I've got a few Sega Genesis model 1 power supplies that put out 13 - 14volts without a load. The regulators inside the console do all the work in dropping that video down to where it is needed and like most 7805s, they should be able to take in voltage of up to about 18 to 20 in most cases. If they have more voltage, it just means they have to dissipate more of that extra off as heat through the heatsinks.

 

Another thing that I believe people forget these days, is that back when these power supplies were new, most homes only had 115v to 117v coming into their house. 30 - 40 years later and we have 120 - 125 like all the outlets in my house. Because these aren't regulated inside, that will also cause them to scale out the output voltage as well. It is one of the reasons I started switching out my old linear regulators on my consoles to newer dc-dc converters and started to pair them up with newer modern switching power supplies output adapters.

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  • 4 years later...

I thought I'd bump this topic to ask if there's any functional difference between the two.  I just swapped out the newer model (on the right) for the older model (on the left) because it was starting to make a buzzing sound every time my Keurig kicked on.  No idea why, but I assume it's because the components inside were starting to go. 

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2 hours ago, Tempest said:

I thought I'd bump this topic to ask if there's any functional difference between the two.  I just swapped out the newer model (on the right) for the older model (on the left) because it was starting to make a buzzing sound every time my Keurig kicked on.  No idea why, but I assume it's because the components inside were starting to go. 

Nothing functionally different inside them. The buzzing would be coming from the internal transformer and it kinda normal as they age because the plates on the transformer might start to delaminate and allow for the plates to vibrate and buzz.

 

I just ordered some parts so I can rebuild a few of mine soon. 

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