Which amp kit w/UPS as power supply? - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 27th June 2008, 06:49 PM   #1
diyAudio Member
 
critofur's Avatar
 
Join Date: Jan 2004
Location: Columbus, OH
Send a message via AIM to critofur Send a message via MSN to critofur Send a message via Yahoo to critofur
Question Which amp kit w/UPS as power supply?

Hello,
I am considering building my first "kit amp" and I happen to have a spare UPS which I replaced when the battery inside died.

I would like to use the UPS as the power supply + case for the amp. Mostly to save money, and, because I already have this dead UPS sitting on my shelf collecting dust.

I notice the "AMP9" kit from 41hz.com can run off 12V, guessing that would be my best option then?

Another thing I was considering - if I wanted a completely noise-free power source, then later I could replace the battery that was in the UPS and then the UPS would be just a batter charger, and the battery would be the power source.

The AMP9 can be powered off of just one +12V source? If I wanted more output, would I have the option of using +/-12V instead? And, from a typical UPS, I could probably get +/-13.8V??

Should I post some pictures of inside the UPS?

I see here: http://diyaudioprojects.com/Chip/AMP6-DIY-T-Amp-Kit/ he's used just the transformer from a UPS, I was hoping to use the whole UPS, including the case as the AMP case.

edit: another thing about the AMP9 that looks good is that it's good down to 2 Ohms, I'm thinking to use it with speakers that will probably have some impedance dips down to about 3 Ohms (w/ a pair of these: http://www.partsexpress.com/pe/showd...number=299-164 wired in parallel to keep the sensitivity over 90 db)
__________________
Critofur
http://www.ohmspeakers.com <- all the folks here are my friends
  Reply With Quote
Old 28th June 2008, 07:08 AM   #2
diyAudio Member
 
Join Date: May 2008
You better ask questions about class D amplifiers in the class D forum.

You can also find some of your answers on www.41hz.com They sell three versions of Amp9. The low profile version can be used up to 14,5 V, the basic version from 12-24 V, and the tall capacitor version 27 V. That means you can upgrade basic and tall capacitor versions later without change, but need to swap capacitors to upgrade the low profile version.

The text on 41Hz seems to indicate the use of single power supply, however the pictures show connections for symmetric supply. I think you should rather ask them directly, if by 12 V they mean 6 V or 12 V single, and by 24 V mean 12 V or 24 V single. Maybe they designed the amp in a way that both can be used, but my impression is that you will need symmetric supply.

As long as you use the amp with the batteries, 13.8 V (or a bit more) is fine. That is pure DC and the capacitors are rated for 35 V.
If you use the amp, while charging, that is a different matter. If 41Hz allows 27 V, then 27.6 V won't kill the capacitors, but you rather ask them directly.
  Reply With Quote
Old 28th June 2008, 07:53 AM   #3
diyAudio Member
 
Join Date: May 2008
BTW, the UPS voltage could be higher than 13.8 V. I remember something like charging with 1.6 or 1.7 V per 1.2 V nominal battery voltage from my formation days.
  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
Split Voltage Switching Power Supply for Power Amp vectorplane Swap Meet 2 23rd April 2011 11:48 PM
LTspice tool for power amp power supply component evaluation andy_c Software Tools 2 23rd August 2009 05:10 PM
Can i use a computer power supply to power audio amplifiers? destroyer X Solid State 91 25th September 2006 04:36 AM
selling high current power supply for power amps. ericpeters Swap Meet 0 14th January 2005 02:21 PM
heater supply (xformer specs are 6.3V 2.5A) as supply for a power LED? jarthel Tubes / Valves 10 21st July 2003 01:30 PM


New To Site? Need Help?

All times are GMT. The time now is 03:45 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2