Customer Reviews

Pyramid PS9KX 5A/7A Power Supply with Cigarette Lighter Plug

5 star:		(7)
4 star:		(3)
3 star:		(3)
2 star:		(3)
1 star:		(2)

 

 

I used this power supply to charge my Lipo batteries for my RC planes. This power supply worked fine when I was charging at 3A continuous. However, the Voltage dropped to an unacceptable level when I tried to charge at 5A. Even 4A did not work very well.

I needed a cheap supply for my home shop and that's what I got.
Having been in the electronics industry for 30 years, I can tell you that this is a piece of Chinese junk.
With a 3 amp load it shuts down on high temp in about 10 minutes.
After being used 3 times the power switch fell apart.
Very poor design from a thermal management perspective and poor overall quality.
I should mention, however, that I probably got what I paid for.
Not worth the expense of returning it since I can make it work with a couple of modifications.

Bought for application using just less than 5 amps. While it does deliver 5 amps, it will only do so for a few minutes, then will shut off, resting comfortably for about 40 minutes, then back on. I needed to return as my application required 5 amps. Nice unit, but not for continuous use at rated capacity

I bought this for a fire radio we are trying to use as a base station. Knowing a bit about power supplies tells me the transistor on the heat sink is only good for 3 amps, not 5. Probably a good 3 amp supply but don't expect more out of it than that.

Worked for me. I measured output at steady 13.81 volts from both cigarette and binding post terminals, and my use only requires about 500mA so never tested its upper current limits. I was using it in my entertainment system to provide regulated voltage to my external DAC, which it did well and improved its sound. Unfortunately it also seems to cause a large amount of interference on the electric line. When it's turned on, my TV (on the same surge protector) gets a large amount of fuzziness that goes away the second I turn the Pyramind PSU off. Gets 5 stars for doing what it should, but loses two for interfering with other components. It's perfect if this is the only thing you're using, but less so if combined with other sensitive equipment.

I have a mobile cb radio that was very expensive and I wasn't using it in my car any longer. So I set it up in my shop, as a base unit. The Pyramid PS9KX was the perfect solution.PYRAMID PS9KX POWER SUPPLY (5A/7A WITH CIGARETTE LITER PLUG)

For a basic 12 volt power supply this is a great value for your money. It is solidly built (except maybe the swith which I feel I need to be gentle with). I am using it with a battery charger and it works very reliably at 1.2 amps but if I try to draw 1.5 or more the voltage eventually drops too low and the charger shuts down. For continuous draw of much more than an amp I would say get the next model up. You get what you pay for as they say.

This is my third Pyramid 12 volt power supply. They are all used in different places and all work very well. They are silent and cool in their operation. They are sturdy and attractive....NO PLASTIC! I do think it is important when choosing the model to make sure you get a high enough amp to more than handle the device you plan to operate from it. This seems to be a complaint from some of the other reviewers and Pyramid makes enough different models that you do have many choices so don't skimp and later regret it. Amazon has such good prices on them that you would be wise to oversize.

I read some reviews that said that this power supply is definitely not 5A rated more like 3A. I bought it anyway because I don't need that many Amps and I need an isolated power supply. But it's true the voltage is regulated to not exceed 13.8 V, but the spec didn't say anything about it could go lower, actually below 12 V at 5A load. And yes you'll need a fan to run at 5A. So for me it's okay for my need, but if you're looking to load it anything more than about 2-3A then buy a stronger power supply.

I use this to power up Raven products (for those of you in the AG industry) I wanted a power supply with a cigarette lighter and posts so I didn't have to modify any customer wiring to run their equipment. Most of the units I run pull 3-5 amps constant and cheaper units dont last long, but this one is holding up great. It gets pretty warm under a heavy load but it has never been really hot. If I ever need another unit I will purchase this again.