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question right size power supply

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pinhead

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Will a pyramid ps-15- kx - 10a run a cobra 29 an a 175 watt power amp ,,,or do my buddy need a bigger power supply thanks ,,,if need bigger what size he need thanks
 

mmckenna

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Probably not.
A 100 watt amateur radio transceiver needs somewhere north of 20 amps. A 175 watt amp is going to need quite a bit more. The CB itself probably only pulls 2 or 3 amps.

I'd be looking for a 40 amp supply, just to cover things. That is, of course, if it really is 175 watts. Only way to know for sure is to use an ammeter to check the real current draw.
 

JayMojave

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Hello Pinhead: Yeah what mmckenna said....

If it really is a 175 watt out put amp it will need 30 amps to run. But some amps are advertised as 175 watts but really only put out a little less like 120 watts.

175 x 2 = 350 / 12 = 29.16 amps.

A 40 Amp supply would run both the amp and the radio with ease. Good luck.

Jay in the Mojave
 

robertmac

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I haven't been censored for a while, so will ask, is a 175 watt power amp legal on the crappy band?
 

RC286

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If you can find a dead older fat PS3 (that powers up) which you should be able to find quite cheap or free.
The power supply in those puts out up to 35A @12v

Very easy to interface. Just have to tie 2 wires from the control line together to power it up, and just switch the mains lead. This is how I did mine.

I use one on my base setup. works great.
My friend also uses one on his 80W PEP import rig.

Cheap easy and beefy SMPS supply, they put out very clean power too.
 

JayMojave

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Hello PH: I know some amps use the number like 175 as a model number, so the output power probably isn't the same, probably less power. Based on experience. But some amps did do what there model number was, a few. My Maverick 250 did 250 on the nose with a General Radiotelephone Super MC-11A driving it.

Good call on the SMPS Power Supply.

Jay in the Mojave
 
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