My new psu

lukaas · 9th March 2012, 02:26 AM

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... :-)

sawreyrw · 9th March 2012, 02:30 AM

If the load is greater than the transformer rating, you must replace the transformer.

Tony · 9th March 2012, 03:13 AM

yes, your traffo must be able to handle the load...

lukaas · 9th March 2012, 05:28 AM

oo.. ok .. thanx all for the replies ..

AndrewT · 9th March 2012, 12:46 PM

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.

sreten · 9th March 2012, 01:08 PM

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.

lukaas · 13th March 2012, 02:06 AM

oo.. ok.. thanx for all the replies guys

9th March 2012, 02:26 AM	#1
lukaas diyAudio Member Join Date: Jul 2009	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... :-)

9th March 2012, 03:13 AM	#3
Tony diyAudio Moderator Join Date: May 2003 Location: Palatiw, Pasig City	yes, your traffo must be able to handle the load... __________________ http://www.elab.ph/forum/index.php?topic=32688.0

9th March 2012, 01:08 PM	#6
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	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. __________________ There is nothing so practical as a really good theory - Ludwig Boltzmann When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

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9th March 2012, 02:30 AM	#2
sawreyrw diyAudio Member Join Date: Apr 2006 Location: Minnesota	If the load is greater than the transformer rating, you must replace the transformer.

9th March 2012, 05:28 AM	#4
lukaas diyAudio Member Join Date: Jul 2009	oo.. ok .. thanx all for the replies ..

9th March 2012, 12:46 PM	#5
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	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.

13th March 2012, 02:06 AM	#7
lukaas diyAudio Member Join Date: Jul 2009	oo.. ok.. thanx for all the replies guys

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