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Pyramid 35 amp regulated power supply

Hi, I just bought this power supply model #PS-36 KX.I have been using it with a Texas Star 400watt cb amp.I only use the amp on medium which pusses 300 watts.But today it had the power protection alarm start going off and the meter run to 16 watts on the power supply and will not go off.If with nothing hooked up to it as soon as you cut it on the light and alarm go off and the meter runs up to 16 watts.Do you have any idea what I have done?Any info would be very greatful! Thanks Jeff

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Use specified power supply by the computer.

Posted on Feb 26, 2008

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You need a PS52KX to use your 400 watt cb amp. The PS 36KX is insufficent for what you are using. I know nfrom years of experience. Ron

Posted on Feb 11, 2011

  • rara May 30, 2013

    what a *******!!! You think that's answering the question????

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Just got a Galaxy DX 2547. Barefoot works GREAT. Problem: When connecting to my linear (Texas Star 667V) rig fires up AOK on AM but on SSB it has issues driving the amp. SWR is OK Radio SSB output ~...


Have you tried turning the mic gain up,and not knowing Texas star model numbers,is it a mobile linear,if so,do you have a sufficient power supply?Just some thoughts off top of my head.

Aug 22, 2011 | Galaxy Radios DX-2547 40-Channels Base CB...

1 Answer

The red lightcomes on when i hook up things to it when nothin is hooked up its green


Usually, this indicates an overload condition. I have a Pyramid 35 amp supply that has no green light but uit does have a red light and an irritating little beeper that the instruction book says is activiated when power draw approaches 90% of rated output. (Why not call it a 30 amp supply if you can't use the full 35???) Enough editorializing. You don't say if the supply actually works, just that the light changes color. If it doesn't work at all, I would start with checking the diode bridge for a blown or leaking diode. If one is bad, it can output enough to drive an LED but fail anything else. If these are good, check the filter capacitor. If this is bad, the hum could concievably confuse the regulator circuit. Next, I would check what ever voltage regulator it has in it. I can't comment on specifics as there are many schemes that can be used. My unit, for example, is like a mouse driving an elephant. It has a small 723 regulator IC, (Aprox. 100ma output), controling 4 large TO-3 pass transistors driven by a 36 volt 40 amp transformer to boil it all down to an adjustable 12 to 15 volts.
The bottom line is without knowing if the unit is puting out or not and not having it in my hand to look at, this is the best I can do. I hope it helps.
Good luck.
Jeff

Feb 03, 2011 | Pyramid 10 Amp Power Supply (068888701655)...

1 Answer

Re: Pyramid PS-36kx power supply buzzer sounded,red light came on


Hi! I saw your question, and maybe this will help. I also have a Texas Star 100w amp, and this same power supply. Even though the nominal draw for your equipment is way below the rated amp flow of the power supply, when you key up, and the output on the amp is at max, you are drawing the limit of your power supply! Try running this setup at a lower linear output. You don't need the full 100 watts to get out! 60-80 watts is aplenty! You should start at a low output, and slowly increase the output(while keyed up), untill the power supply starts to complain.(buzzer/light). This is what your limit will be. The only other cure, is a MUCH bigger power supply. Unfortunately, I cannot afford a 60-90 amp supply, so this is what I am forced to do to use the one we have. Also,keep your cb's output very low when using the linear amp. These amps are supposed to get a low signal from your radio, or the linear amp is overdriven. (noisy and unstable. Hope this helps you! 73's to you! jimsjinx

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1 Answer

Connecting a Cobra 29LTD to a Pyramid PS-3KX 13.8VDC Power Supply


The wires should just attach to the red and black terminals on the radio, strip some wire unscrew the terminals a little wrap behind, and tighten again. Good luck! Or buy some banana plugs and they will plug right in the front

Dec 18, 2008 | Cobra 29 LTD CB Radio

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Ps 52 kx power supply will not hold load


thank you for your help . I have already fixed the power supply I double checked the transisters and found three bad so I replaced all the power transisters and it is fine . thanks again bob

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1 Answer

Pyramid ps-36kx


Generally, the fuse only blows when the rectifiers fail. In other Pyramid supplies, they use a square, 4 terminal bridge rectifier. They probably use the same thing in your supply.

Let me know if you have any other questions.

Nov 15, 2008 | Pyramid - PS21KX 20 Amp Power Supply Car...

1 Answer

Pyramid ps-21k power supply


you need to get the voltage regulator circuit checked in your ps-21k

Jun 13, 2008 | Pyramid 10 AMP 13.8V POWER SUPPLY Car...

1 Answer

PS36K power supply overload problem


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.

Dec 21, 2007 | Pyramid - PS21KX 20 Amp Power Supply Car...

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