Looking for a good power supply for testing 12V equipment - diyAudio
Go Back   Home > Forums > Design & Build > Equipment & Tools

Equipment & Tools From test equipment to hand tools

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 6th January 2015, 05:36 PM   #1
diyAudio Member
 
PapaZBill's Avatar
 
Join Date: Oct 2013
Location: Yale, Oklahoma
Default Looking for a good power supply for testing 12V equipment

I'm in need of a good power supply for testing 12 volt equipment. Can one be had for $150 or less that can supply 50 to 70 amps?
__________________
Any sufficiently advanced technology is indistinguishable from magic.

Arthur C. Clarke
  Reply With Quote
Old 6th January 2015, 07:05 PM   #2
diyAudio Member
 
Join Date: Jun 2011
The easiest way to get that kind of current is a battery.

The trouble with a battery is that it can supply that kind of current.

Better to have a lower current lab PSU with current limiting and a battery for when you really need the current IMO.
__________________
Now I am Become Death, the Destroyer of Words
  Reply With Quote
Old 7th January 2015, 05:34 AM   #3
diyAudio Member
 
Join Date: Jul 2003
Location: Dona paula, Goa
But if you want 12.0 Volts exact, battery won't do.

Gajanan Phadte
  Reply With Quote
Old 7th January 2015, 06:55 AM   #4
RJM1 is offline RJM1  United States
diyAudio Member
 
Join Date: Jan 2010
Location: Titusville, Fl.
Yes, if you don't mind using a computer power supply. You will have to keep a small load on the +12 and +5V rails and add a power switch.
Something like this single 12V rail 83A,.
LEPA MaxBron B1000-MB 1000W ATX CrossFire Ready 80 PLUS BRONZE Certified Active PFC Power Supply - Newegg.com

Last edited by RJM1; 7th January 2015 at 07:00 AM.
  Reply With Quote
Old 7th January 2015, 11:11 PM   #5
dangus is offline dangus  Canada
diyAudio Member
 
Join Date: May 2004
Location: Vancouver Island
Maybe the transformer from a cheap 120 arc welder (might have to remove a series inductor winding). Big bridge rectifier, big caps, then a whole bunch of cheap power transistors paralleled and with emitter resistors.

The problem with a battery is that it only represents the "engine off" situation. Most of the time, 12V gear is running from the alternator power which floats the battery at around 14V. I'm not sure what happens when the bass hits and an amp demands more than the alternator can supply... does the voltage have to drop to 12V before the battery can supply anything? I've been meaning to test that...
  Reply With Quote
Old 8th January 2015, 04:19 PM   #6
diyAudio Member
 
PapaZBill's Avatar
 
Join Date: Oct 2013
Location: Yale, Oklahoma
Thanks guys,
I've considered all of your suggestions and decided on spending a little extra for a Pyramid PS52-KX for about $220.00. I'm a bit spoiled at work having 3-50 amp astrons on my bench and a floater if I need it,plus 2 banks of 6 astrons all master/slave controlled and w/current and voltage meters for the AP testing stations.But,sadly my budget is not that flexible!! Maybe one day I will build something along the lines of what Dangus proposed.
__________________
Any sufficiently advanced technology is indistinguishable from magic.

Arthur C. Clarke
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
A good 12v power supply to run small class D amplifier indoors? chipper Power Supplies 2 16th June 2014 03:57 PM
How does one hook up a lab power supply to audio equipment? osd1 Parts 4 26th August 2013 06:19 AM
WTB F5 power 12V input smps power supply JZatopa Swap Meet 2 19th June 2011 01:41 AM
Power One 12V 10A linear power supply boywonder Swap Meet 0 11th September 2010 03:38 PM
Modded Atx Power supplies for testing 12v equipment........ slizm Swap Meet 0 30th August 2007 11:03 PM


New To Site? Need Help?

All times are GMT. The time now is 12:12 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2