100 amp power supply?

kramer212 · 10th January 2012, 11:14 PM

cant seem to find any affordable ones will consider having lower amperage ones, but would prefer 14.4volts instead of the 13.8v ones.

what are decent cheap supplys?
links please

thanks in advance.

counter culture · 11th January 2012, 01:27 AM

You'll get 100A out of a truck battery if you're lucky, for a while.

100A is a LOT of current. Enough to make this a stupid question...

thaumaturge · 11th January 2012, 01:37 AM

There is no such thing as a cheap 100 amp 14.4 Volt supply. Most BIG garage battery chargers will only do 70-80 continuous. But you want links...
DSR ProSeries Battery Charger — 300/70/40/20/2 Amp, Model# PSW-70300A | Battery Chargers | Northern Tool + Equipment

johansen · 11th January 2012, 08:24 AM

there's a few ebay sellers that sell 100 amp 13.8 volt supplies that are about 10 pounds, and run you about 200$. ~150$ for a 72 amp unit, (1000watts) all of them are eastern in origin.

you should be able to adjust the voltage, any 13.8v supply can deliver 14.4 if the feedback loop isn't buried in an epoxy encapsulated board.

Now and then you can find a lambda 12-15 volt 100 amp power supply for $50-100 on ebay. i didn't find any today though.

another alternative is 1000 watt computer power supplies. they frequently advertise 70-90 amps on the 12v rail, but the newer high power types are difficult and or impossible to adjust.

what is the application?

kramer212 · 11th January 2012, 05:00 PM

when i said cheap i ment under $300 its for a test bench, i have about 30 amplifiers right now anyways that im going to do tests on and find the true watts rms before clipping might even make videos.

riccoryder · 11th January 2012, 06:57 PM

Here's one that's a fairly decent variable regulated switching 75 Amp supply, 16 Volt max. $259.95 plus tax, shipping, vaccinations... Some fairly high current supplies are offered by ham vendors for running the more powerful mobile transceivers or repeaters. picture: http://www.mfjenterprises.com/pictures/MFJ-4275MV.jpg Product page (doesn't say very much) MFJ Enterprises Inc.

thaumaturge · 11th January 2012, 11:12 PM

Just for reference as to the best:
Hewlett Packard 6456B 36V/100A DC Power Supply, Refurbished HP Agilent Hewlett Packard - Used Test Equipment at Test Equipment Depot

10th January 2012, 11:14 PM	#1
kramer212 diyAudio Member Join Date: Dec 2011	100 amp power supply? cant seem to find any affordable ones will consider having lower amperage ones, but would prefer 14.4volts instead of the 13.8v ones. what are decent cheap supplys? links please thanks in advance.

11th January 2012, 01:37 AM	#3
thaumaturge diyAudio Member Join Date: Aug 2011 Location: Utah	There is no such thing as a cheap 100 amp 14.4 Volt supply. Most BIG garage battery chargers will only do 70-80 continuous. But you want links... DSR ProSeries Battery Charger — 300/70/40/20/2 Amp, Model# PSW-70300A \| Battery Chargers \| Northern Tool + Equipment __________________ Ne timeas a facie mulierum ea ignorare

11th January 2012, 11:12 PM	#7
thaumaturge diyAudio Member Join Date: Aug 2011 Location: Utah	Just for reference as to the best: Hewlett Packard 6456B 36V/100A DC Power Supply, Refurbished HP Agilent Hewlett Packard - Used Test Equipment at Test Equipment Depot __________________ Ne timeas a facie mulierum ea ignorare

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11th January 2012, 01:27 AM	#2
counter culture diyAudio Member Join Date: Jun 2011	You'll get 100A out of a truck battery if you're lucky, for a while. 100A is a LOT of current. Enough to make this a stupid question...

11th January 2012, 08:24 AM	#4
johansen diyAudio Member Join Date: Apr 2010 Location: seattle, wa	there's a few ebay sellers that sell 100 amp 13.8 volt supplies that are about 10 pounds, and run you about 200$. ~150$ for a 72 amp unit, (1000watts) all of them are eastern in origin. you should be able to adjust the voltage, any 13.8v supply can deliver 14.4 if the feedback loop isn't buried in an epoxy encapsulated board. Now and then you can find a lambda 12-15 volt 100 amp power supply for $50-100 on ebay. i didn't find any today though. another alternative is 1000 watt computer power supplies. they frequently advertise 70-90 amps on the 12v rail, but the newer high power types are difficult and or impossible to adjust. what is the application?

11th January 2012, 05:00 PM	#5
kramer212 diyAudio Member Join Date: Dec 2011	when i said cheap i ment under $300 its for a test bench, i have about 30 amplifiers right now anyways that im going to do tests on and find the true watts rms before clipping might even make videos.

11th January 2012, 06:57 PM	#6
riccoryder diyAudio Member Join Date: Dec 2011	Here's one that's a fairly decent variable regulated switching 75 Amp supply, 16 Volt max. $259.95 plus tax, shipping, vaccinations... Some fairly high current supplies are offered by ham vendors for running the more powerful mobile transceivers or repeaters. picture: http://www.mfjenterprises.com/pictures/MFJ-4275MV.jpg Product page (doesn't say very much) MFJ Enterprises Inc.

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