| Author |
Message |
    
Buck
| | Posted on Tuesday, August 20, 2002 - 1:20 pm: | 
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I am in need of a power supply. I have an outlet for computer towers with 300 to 400 watt power supplies built in. Has anyone ever used one of these? Just curious is this would work or not.
Thanks in advance |
Dimstar
| | Posted on Tuesday, August 20, 2002 - 1:53 pm: |
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Yep. I have .Just make sure about the voltage output and the amperage. I use a 300watt with 12 volts and 10 amps on my Icom 2100. Computer power supplies are very quiet. |
Insider
| | Posted on Tuesday, August 20, 2002 - 8:54 pm: |
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One note of caution. Computer PSUs have both positive and negative outputs (hot wires) with respect to ground potential. |
2600
| | Posted on Tuesday, August 20, 2002 - 10:37 pm: |
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Most computer power supplies will require a 'minimum' load on the +5-volt output, even though you will be using the +12-volt side. The NorthStar base (the one that LOOKED like a Galaxy Saturn) used a computer AT-cabinet type power supply, with a 10 watt resistor drawing a half an amp or so from the 5-volt side. Some switching power supplies can go nuts if the 5-volt output is completely unloaded. All the other output voltages are usually 'referenced' to the 5-volt output, so if it jumps too high from being run with no load, the other voltages will go nuts, too.
73 |
Taz
| | Posted on Wednesday, August 21, 2002 - 12:43 am: |
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heh, I had one computer I used for experimental purposes for school. I used 5hds in this computer and a total of 90.5 gigs.
I used a power supply that is used in big computer servers I got from my dad (work) 1000 watts hehehe. It all worked awesome! 1 master drive and I used the rest for slaves. The main was a 60gig, 3 were 20 and one was 20.5
Loaded linux and used R.A.I.D.! |
Insider
| | Posted on Wednesday, August 21, 2002 - 6:54 pm: |
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I hear people say that switch mode PSUs are extremely dangerous because of high voltages. Are the pre-output voltages any higher than in a normal linear PSU or is it just because of the frequency the power supply uses in the voltage conversion process? |
bruce
| | Posted on Thursday, August 22, 2002 - 10:07 am: |
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My bad vives about them is when they fail they fail BIGTIME... call me old but a regular supply when it failed normaly pops a fuse. Swithers run at very high frequencys so you can cut down on transformer size the higher the frequency the less medal you need to make it work and smaller filters since the R/c time is very short compaired to 120 hz of a full wave. The rule of KISS gives linear ones a big edge on dependably but you must pay with a much biger size |
