Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

Using Apple iBook transformer with BrianGT kit
Using Apple iBook transformer with BrianGT kit
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
Thread Tools Search this Thread
Old 23rd December 2004, 07:17 AM   #1
patrick.mchugh is offline patrick.mchugh  United States
diyAudio Member
Join Date: Dec 2004
Location: shelby township, Michigan
Default Using Apple iBook transformer with BrianGT kit

I was staring down at the charging unit for my iBook, and in small print it says input 110-240, output 24v. If anyone is interrested it is called the Apple 45W Portable Power Adaptor. There is another one for other ibooks and powerbooks that comes in 90W flavor. Could this unit possibly be a replacement for the transformer in a briangt stereo kit? What other kind of wallplug transformers do you think would work if this is possible?
  Reply With Quote
Old 23rd December 2004, 07:31 AM   #2
r0cket- is offline r0cket-  United States
diyAudio Member
Join Date: Aug 2003
Location: Portland, OR
I doubt it would provide sufficient current (I think they provide about an amp and a half or one and 3/4 @ 24V, which would roughly jive with the 45W rating--still on the small side for a gainclone).

Anyway, those adapters are like $50 a pop, so it'd be cheaper to just build a real supply for the gainclone, and I suspect you'd end up with cleaner power anyway (that, and a supply that won't die every year like the iBook adapters do).
  Reply With Quote
Old 24th December 2004, 09:16 PM   #3
Stocker is offline Stocker  United States
diyAudio Member
Join Date: Dec 2003
Location: Austin
The local Goodwill computer store has loads of power adapters for well under $50... if you don't mind digging, and know what to look for, you could come up with something useful.
Jesus loves you.
  Reply With Quote
Old 25th December 2004, 03:09 AM   #4
neutron7 is offline neutron7  Canada
diyAudio Member
neutron7's Avatar
Join Date: Dec 2003
Location: Toronto Canada
you need + and - voltage. from what you describe it is only +

it would be a pain and not really worth your time to make the converter for it to work. unless you want to run it with single ended, then you will have only 12v or so per "rail" and it will be kind of weak, although it would probbaly work.

for the same pric as that you could get a decent transformer. and parts needed to make a "proper" power supply.

unfortunately most power bricks only have + outputs because most modern digital and computer equipment do not need - rails at all, and even if they do it is at much lower current.

one thing you might look at is power brick for computer subwoofer. i am not sure but i think they probably have + and - output. you should probably put additional filter as well especially if it is a switching supply.

some computer subs are probably digital amps and also only need + supply though so research what you need if you want to go that road..
  Reply With Quote


Using Apple iBook transformer with BrianGT kitHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
briangt PSU 1 transformer, 2 PSU, how to? sansbury Chip Amps 30 28th March 2010 07:26 PM
Wiring an Avel Transformer to a BrianGT PS - need help schmalex Chip Amps 9 14th July 2005 06:57 PM
transformer with 3886 (BrianGT Boards) mantisory Chip Amps 2 3rd May 2005 02:59 PM
Transformer and pot for BrianGT kit poeee Chip Amps 15 28th November 2004 12:49 AM
Is this Transformer OK to use with BrianGT's dual mono kit? mattjk Chip Amps 4 22nd October 2004 11:00 AM

New To Site? Need Help?

All times are GMT. The time now is 07:36 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio