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› Pyramid PS gets HOT
09-15-2007 04:20 AM  10 years agoPost 1
Two Left Thumbs

rrKey Veteran

Houston, Texas - USA

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I use an Alinco power supply for my chargers, and it barely gets warm.

I just bought a Pyramid PS-15KX (10A)for another project, and figured I'd test it out with some battery charging. I set up two FMA Cellpro chargers, at 3A each, with a watt meter in line. Max A draw was 7.4A, but most of the time under 6A.

Now, my question

The Pyramid is HOT The heat sinks are 185F, way too hot to touch.

Anyone else have a Pyramid supply? Does it run this hot???

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09-15-2007 06:25 AM  10 years agoPost 2
HHawk

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Gardnerville Nv.

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Ive got the Pyramid 26KX. It does get pretty hot, I put a fan on it and it keeps it a little cooler. I also never let the charge go unattended just in case.

Mine gets up to 183*, without a fan pointed at it. A little hotter that the XL motor gets

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09-17-2007 01:47 AM  10 years agoPost 3
hpilotrc

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NY--->>Mooresville, NC USA 8/2005

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Pyramid Power Supplies.....

They are simply junk...sorry to say. They cannot handle the current that they are rated for! Heat sink in the 26KX was extremely small and the unit ran hot and smelled like toxic epoxy burning! I tested mine at 75% rated current and it shut down and after minutes (of cooling down) blew the line fuse. Transformer shorted out...sent it back for a refund. Total loss because the thing was so heavy it wasn't cheap to send back. The company in NY City wanted me to pay the shipping (both ways) for repair under warranty!!!
Pay more money and get an Astron Supply...they should last forever.

Stay away from Pyramid Supplies.
Michael

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09-17-2007 02:39 AM  10 years agoPost 4
Two Left Thumbs

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Houston, Texas - USA

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Darn it, should have researched more before I ordered it At least it wasn't too expensive. I saw one recently in someone's lab, I casually asked about it, he said it was great.

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09-17-2007 06:46 PM  10 years agoPost 5
HHawk

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Gardnerville Nv.

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I got mine from Etronics, and I would never buy from them again, CRAPPY service. The first one I received was damaged and had to be sent back!
The one I have is well above the amps I need to charge 6s so it works fine for me. But now I know for sure to not demand any more from it. Thanks for the tip hpilotrc.

Two Left Thumbs, I did get mine to run 20-30* cooler with a standard room cooling fan pointed at it.

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09-18-2007 03:00 AM  10 years agoPost 6
Two Left Thumbs

rrKey Veteran

Houston, Texas - USA

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Michael you are spot on, Pyramid power supplies (at least the one I now have), are total junk.

Mine is rated for 10A continuous, 12 surge. I just put a 5.3A load on it for 90 minutes, and it shut down in protection mode, most likely over heated.

What good is it if it can't even take a 50% load for 90 minutes. In an air conditioned room no less!

What a pile of crap.

I'll see if I can return it, but the shipping costs are high, basically I just flushed money down the toilet.

Buyers beware, stay away from Pyramid.

Now, who can recommend a good power supply to run a 5.3A load for days at a time? I want one with a cigar lighter outlet, that is why I chose the Pyramid above. I could get another Alinco, but it is overkill for my needs, the load will always be under 6A.

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09-18-2007 09:52 PM  10 years agoPost 7
Two Left Thumbs

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Houston, Texas - USA

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Just a note to say I called Pyramid tech support. I was told yes, it shut down because it has small heat sinks and no fan, that I should get one of their larger models with a fan.

I pointed out that it is rated at 10A continuous, but there is no way it will do that since it will over heat. Again, he suggested upgrading to a larger supply.

Basically Pyramid knows their products will not live up to their specs. Hopefully some future buyer will read this thread and choose a higher quality supplier.

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09-19-2007 01:44 AM  10 years agoPost 8
Rob_T

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Take it back. If it was sold as a 10A unit, but can't deliver 10A then you were duped, and the shop that sold it is guilty of fraud. They should give you your money back.

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09-19-2007 03:23 AM  10 years agoPost 9
Two Left Thumbs

rrKey Veteran

Houston, Texas - USA

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Thanks Rob. I agree.

The problem is the supply cost $38, and it will cost a combined shipping cost of $36 to return it! Just not worth it to send it back, I'd rather not spend another dime on it. The seller will not pay for return shipping.

Funny just as I am typing this, it cut out again with a click. I ran the same test, and it shut down in under two hours.

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09-19-2007 04:58 AM  10 years agoPost 10
Rob_T

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You've got 3 options then.

Buy a 110V fan to improve the cooling- you can get them at Fry's for under $5. That will probably work well enough.

Tell your credit card co you're disputing the charge, and write to the seller informing him that you have his power supply available for collection or shipping at his expense. If the seller objects, inform them that the alternative is for you to press charges for consumer fraud. If you can get you state's AG on your side this will work, otherwise it's a bit of a bluff because taking it to court will cost you more than the supply cost.

Write the supply off, and just treat it as if it were rated at about 4A. It's still fairly cheap for a 4A supply.

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09-20-2007 03:24 AM  10 years agoPost 11
Two Left Thumbs

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Houston, Texas - USA

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Miracles do happen

The vendor agreed to pay for return shipping and give me a refund, minus initial shipping cost. So I will be out $18 for the experience.

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