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Pyramid PS21KX 20 Amp Power Supply

by Pyramid
| 3 answered questions

List Price: $284.99
Price: $105.62 & FREE Shipping. Details
You Save: $179.37 (63%)
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
  • Output Power: 450 W
  • Efficiency: 60%
See more product details
42 new 5 used from $81.54 2 refurbished from $68.07
Special Shipping Information: Due to federal and international regulations, this product can only be shipped within the 50 states.

$105.62 & FREE Shipping. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

Pyramid PS21KX 20 Amp Power Supply + Elenco Electronics TL-16 Banana to Large Alligator Test Lead Set
Price for both: $113.72

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Product Description

Perfect for Home, Shop and HobbyistInput: 115V AC, 60Hz, 450 Watts Output: 13.8V DC 18 AMP Constant/20 AMP Surge Powers Cellular Phones,12V DC CB Radios, Scanners, HAM Radios, Autosound Systems, etc. Screw Terminal Connectors Crowbar Over-Voltage Protection Electronic Overload Protection w/Auto Reset Short Circuit Thermal Protection Fuse Protected LED Condition Indicators Built-in Cooling Fan Heavy Duty Cabinet Heatsink with Anti-Skid Rubber Feet Dimensions: 11.81-Inch L x 9.05-Inch W x 4.92-Inch H

Product Information

Technical Details
Item Weight15.6 pounds
Product Dimensions12.7 x 10.6 x 5.7 inches
Item model numberPS21KX
Chassis SizePlease fill in Unit Size
Warranty1- YEAR
Weight33.8 Pounds
  
Additional Information
ASINB0002JTD2A
Shipping Weight16 pounds (View shipping rates and policies)
ShippingCurrently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
Date First AvailableJune 15, 2005
  
Warranty & Support
Warranty, Parts: Parts

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
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Customer Questions & Answers

Customer Reviews

Fan noise is noticeable, but not obnoxious.
DEN77
I use this Power supply for my ham radio hobby and it works perfectly powering many radios.
Gregory 00
I am definitely buying other Pyramid equipment in the near future.
Harold S Emery

Most Helpful Customer Reviews

17 of 18 people found the following review helpful By Mitchell on July 18, 2010
I bought this unit around 2 years ago, and it is still working just fine. It seems to be built well, and the ammeter on the front doesn't show any signs of the unit struggling to power my 55 watt amateur radio on either 2 meter or 70cm frequency bands. I would recommend this over the more expensive choices out there.
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13 of 14 people found the following review helpful By Frank Mellott on December 23, 2010
I received this as a gift a couple years ago, and it's going strong. I use it as a 12v source for special chargers that I use to charge the various types of batteries used in Radio Control airplanes and cars. I've used it in the sweltering heat of my garage in Central California, and in the cold of my garage in a much colder climate. I even dropped it once, and it's working great!

If I were to say there is a downside, it's that there's only one output pair. I rigged up a multiple output attachment that works fine for my needs. Two pairs of heavy duty binding posts and a project box from an electronic store plus some heavy wire and a couple banana plugs.
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9 of 9 people found the following review helpful By Randall Krippner on February 15, 2012
Verified Purchase
The Pyramid PS21kx is an excellent power supply. My wife is a HAM radio operator and I purchased the power supply so we could use her new Yeasu mobile 2 meter as a base station, and in this capacity, the Pyramid works very well. It's an extremely solid, hefty piece of equipment, and obviously very well consturcted. Haven't done any actual testing of the supply because I don't have the test equipment necessary, except to check the output voltage, which is spot on. I can tell you how it works in operation, though, and it has been flawless. Quiet, no noticiable humming noise as one often gets with less well made supplies. It handles the radio very well, even when she cranks the output power up to 75 watts. I'd certainly recommend it to anyone who needs a fairly heavy duty, 12 volt power supply. HAM radio operaters who often need 12 volt power to operate mobile radios ought to serious look at this unit. Very wel made.
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7 of 7 people found the following review helpful By Dan M. Beadle on December 15, 2011
Verified Purchase
I am using this to power an aircraft instrument panel that I am building. It will eventually be installed into an airplane with great difficulty, so I want to get it right on the bench. And I need 20A of 12-14V.

This product fit the bill just fine.

I ordered on Sunday for two day delivery and expected it on Wednesday. It arrived Tuesday.

There isn't much to say about a power supply - it is powerful, the ripple specs put it closer to a battery than an alternator powered aircraft or auto. (That's a good thing).

The only gripe is that the built in ammeter is a little on the cheap side. Digital would be great, but I didn't pay for digital. The needle is about 1/2 amp lower than the actual draw, as verified by a precision Fluke multimeter. I can live with that.

I have some great bench power supplies that cost several hundred dollars and have better features, but only put out 1/3 the power. So, all in all, this was a good fit for my application.
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4 of 4 people found the following review helpful By D. Gulliver on December 27, 2011
Verified Purchase
I have had this about 8 months, use it to supply power to multiple battery chargers (charging Lipo batteries for RC planes) and I typically run it at the 20 amp limit. I like the dial showing the output in amps so I know when to stop adding more chargers on line. This device has performed really well, no complaints. If I were to do it again I would get a 30 amp charger so I could charge even more batteries at the same time. Because of losses in the chargers, I can charge about five batteries at 2.2 to 2.5 amps each.
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9 of 11 people found the following review helpful By William R. Lairsey on September 26, 2009
Verified Purchase
My Pyramid PS21KX 20 Amp Power Supply works great and provides a smooth flow of power all the way up to it's design limit... The unit is constructed extremely solid with obvious quality built into the design.
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3 of 3 people found the following review helpful By Eremite on February 20, 2014
Verified Purchase
The package arrived inside a box big enough for a case of toilet paper with no buffering. The larger box was crushed so I checked the inside and the box was unharmed. After getting it home and opening it I found the Amp looked like it had been dropped 20 feet and put back inside a new box. With the styrafoam inserts it couldn't have got busted up like it did. I sent for a replacement and the next one arrived with screws loose in the plastic and parts rattling inside. I'm not sure if they are trying to get rid of refurbished equipment on here or not but this place is getting more like Ebay everyday. I never plugged them up and don't know if they worked or not but I ended up buying a different one from somewhere else. I recommend you do the same friend.
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2 of 2 people found the following review helpful By Dave from Tacoma on October 27, 2012
Verified Purchase
I originally bought this for my Yaesu FT-950 - but alas it doesn't have
the Amps to run a 950. But rather than return it, I decided to dedicate
it to my Yaesu FT-2900 2m FM rig - works GREAT for that, with plenty of
12vdc for whatever else I might want to add in the shack.

My only complaint would be the fan - it runs 100% of the time - it's NOT
thermally controlled. Given that it's WAY more amps than I need for the
radio, and I seldom talk key-down for more than a few minutes, I'm tempted
to go in and disable the fan... not recommended of course - but just know
it's a fairly loud fan.

Another little issue - see the photographs? They list the "features" on
the front panel - but in SILKSCREEN PRINTING!! So the front of the unit
forever looks like an ad - that's just dumb. Make it be plain paint, like
an Astron, and if you want FEATURES listed, use a sticker than can be removed.
I do plan to repaint the front panel.... pretty ugly, gotta say.

I still give this PS 5 stars - perfect for what it is.
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Most Recent Customer Reviews

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Pyramid PS21KX 20 Amp Power Supply
This item: Pyramid PS21KX 20 Amp Power Supply
Price: $284.99 $105.62
Ships from and sold by Amazon.com