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Old 9th March 2012, 02:26 AM   #1
lukaas is offline lukaas  Malaysia
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Default My new psu

Hey guys,

I'm fairly new to electronic hobbyist, but not a stranger to this field.

I have an unregulated 12V/14V 20Amp power supply unit. My plan was to hook it up to my extra car power amp and play it in my home.

But after recent readings, I come to conclusion that my psu amperage will not be sufficient to handle the loads.

So, my question is, how do I improve the psu? without changing the main transformer unit... :-)
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Old 9th March 2012, 02:30 AM   #2
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If the load is greater than the transformer rating, you must replace the transformer.
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Old 9th March 2012, 03:13 AM   #3
AJT is offline AJT  Philippines
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yes, your traffo must be able to handle the load...
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Old 9th March 2012, 05:28 AM   #4
lukaas is offline lukaas  Malaysia
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oo.. ok .. thanx all for the replies ..
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Old 9th March 2012, 12:46 PM   #5
AndrewT is offline AndrewT  Scotland
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It is usual for the transformer VA to be rated at 1times to 2times the maximum power output of the amplifier.

If the manufacturer of the power amplifier is not telling lies then a 260VA transformer can power a range of amplifiers from 130W to 260W.

But that same transformer can still allow a much wider range of amplifier powers to operate without damage. Probably from 10W to 500W with care.
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Old 9th March 2012, 01:08 PM   #6
sreten is offline sreten  United Kingdom
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Hi,

There is nothing stopping it working well unless you connect it to a real
1KW car amplifier, connect that to a load of loudspeakers and then run
it a full volume with test signals and wait to see what blows up first .....

With a decent capacitor bank it will be fine with any sensible car amplifier.

rgds, sreten.
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Old 13th March 2012, 02:06 AM   #7
lukaas is offline lukaas  Malaysia
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oo.. ok.. thanx for all the replies guys
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