Pyramid Power Supply PS 52KX

You can try contacting a local car audio professional or Pyramid customer support directly here:

http://www.pyramidcaraudio.com/ContactUs.aspx

Have you set it up properly ? Consult instruction book. If you are certain it is defective, get a refund under the warranty (if it's new it should still be under guarantee)
18.January.2015.

Recommend contacting a local car audio professional or Pyramid customer support directly here:

http://www.pyramidcaraudio.com/ContactUs.aspx

Scotty; I need more power!
Recommend contacting a local car audio professional or Pyramid customer support directly here:

http://www.pyramidcaraudio.com/ContactUs.aspx

I HAVE A PYRAMID PS-52KX I NEED TO KNOW THE R13 RESISTOR OHMS AN TOLARENCE AND WATT.

Sounds like the regulator goin. I've read when they go bad it will go full voltage which is 37vdc.
Looks like they use the LM723 regulator. I'm no expert, but may be that simple.
Here's a link to a schematic. Hope it helps
http://www.pyramidcaraudio.com/manuals/PS52K.pdf

I have a PS14KX. It won't handle any load. If you have any ideas let me know

Buy a heavier duty unit.

I found one at www.retrevo.com

I'm not sure what you mean by 'wide open voltage'. If it's over 17v, the supply may have multiple problems. I don't have the 52kx schematic but other Pyramid supplies have over-voltage protection. There is an SCR that is triggered when the voltage gets to ~17v. This should clamp the output and trigger a shutdown. You should check the 16v Zener diode and the SCR. If the SCR or the Zener is defective, that would prevent the over-voltage from clamping the voltage. Also confirm that the SCR has a solid connection to the ground terminal of the supply. If it's open, that could prevent the clamp from shutting down the supply.

If the voltage is going high, measure the DC voltage from pin 4 to pin 5 of the LM723. It should remain the same at all times. Also measure the voltage from pin 5 to the ground terminal of the supply. That should also remain constant at all times.

Most of Pyramid's supplies are based on the LM723 voltage regulator. The DATASHEET should tell you most of what you'll need to know to repair it. THIS is the schematic diagram.

If the output voltage drives the voltmeter to the end of the scale, it likely has one or more shorted power transistors.