6 channels using audiosector kit(s) transformer / powersupply options - 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 5th December 2006, 06:02 PM   #1
diyAudio Member
 
Join Date: Nov 2006
Send a message via AIM to clearwaterms
Default 6 channels using audiosector kit(s) transformer / powersupply options

okay,

I would like everybody to offer some advice and input, and finally hopefully answer some questions for me.

I have spoken via email to Peter Daniels and here is my plan. I would like to build a 6 channel amplifier using 1 1/2 audio sector kits. This being home theatre it's actually going to be only using 5 channels, I will keep the sixth channel down the road and because the LM4780 is a stereo chip. My question is in the transformer and power supply. The audio sector kits comes with a basic rectifier board, however I would really like to use a snubber setup. Also, how many, and what size transformers should I use. I have spoken to Peter at Audio sector and he suggested using two 300~400VA transformers and two power supply boards. Can I use two of the chip amps snubber supply boards to power 3 LM4780 chips? Each power supply would have it's own toroid. I was looking at some toroids on ebay that were 400va at 25v, would those work? Also, finally what size inline AC fuse would you recommend for this?
  Reply With Quote
Old 6th December 2006, 01:20 PM   #2
diyAudio Member
 
Join Date: Nov 2006
Send a message via AIM to clearwaterms
anybody?
  Reply With Quote
Old 6th December 2006, 02:28 PM   #3
CarlosT is offline CarlosT  United States
diyAudio Member
 
Join Date: Oct 2006
I'm sorry...total noob here...

My only comment would be that some of the channels for a home theatre do not require as big of an amp or in simpler terms as heavy duty of a transformer. You may be wise to save some money on smaller trannies for the rear channels and concentrate on heavier trannies for the front channels and sub if you're gonna drive a passive sub (gosh...do they even make these anymore?).

You could also size heatsinks accordingly but now I'm getting ahead of myself

Anyway...putting a few LMs in the same box sounds kinda cool. Good luck.
  Reply With Quote
Old 6th December 2006, 02:29 PM   #4
CarlosT is offline CarlosT  United States
diyAudio Member
 
Join Date: Oct 2006
BTW the Jade Factor to this thread of 28:1 ain't bad
  Reply With Quote
Old 6th December 2006, 03:25 PM   #5
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Yes. Use one traffo/psu for the front two l/R channels and one traffo/psu for centre and rears.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 6th December 2006, 03:49 PM   #6
diyAudio Member
 
Join Date: Nov 2006
Send a message via AIM to clearwaterms
Quote:
Originally posted by CarlosT
I'm sorry...total noob here...

My only comment would be that some of the channels for a home theatre do not require as big of an amp or in simpler terms as heavy duty of a transformer. You may be wise to save some money on smaller trannies for the rear channels and concentrate on heavier trannies for the front channels and sub if you're gonna drive a passive sub (gosh...do they even make these anymore?).

You could also size heatsinks accordingly but now I'm getting ahead of myself

Anyway...putting a few LMs in the same box sounds kinda cool. Good luck.
My plan was to drive the front speakers off one power supply with a 400va transformer, and a second transformer to drive the other two LM4780 chips. those four channels would make the surrond / center channel. I email brian over at chipamps and he said that he could sell me the PCB's for the power supplies and suggested just using 3 power supply boards, so that is what I am thinking about doing. as for heat sinks, in the marketplace section of this website there is a company called DIYencousures and i was looking at there standard with the heatsinked sides. I could put two transformers and all 6 boards (3 PS and 3 LM4780 chips) in the case (i think it would fit, have to actually plan it out)

Quote:
Originally posted by CarlosT
BTW the Jade Factor to this thread of 28:1 ain't bad
im sorry, but I am very new to DIY and not exactly sure what that means
  Reply With Quote
Old 6th December 2006, 03:49 PM   #7
diyAudio Member
 
Join Date: Nov 2006
Send a message via AIM to clearwaterms
Quote:
Originally posted by pinkmouse
Yes. Use one traffo/psu for the front two l/R channels and one traffo/psu for centre and rears.
can I use the Snubber set from chip amps to do this? I would be purchasing two of his kits? will that work?
  Reply With Quote
Old 6th December 2006, 03:53 PM   #8
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
I would imagine so, but I'm not up on snubbers, as when I experimented a while back I found they made either no difference or sounded worse. Still I see no harm in you trying them.

Oh, and don't worry, I have no idea what the jade factor is either.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 6th December 2006, 03:55 PM   #9
CarlosT is offline CarlosT  United States
diyAudio Member
 
Join Date: Oct 2006
Quote:
Originally posted by clearwaterms
...im sorry, but I am very new to DIY and not exactly sure what that means (Jade Factor)
It means that your thread garnered few views in relation to the responses you got...so you shouldn't be disappointed
  Reply With Quote
Old 6th December 2006, 03:57 PM   #10
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Quote:
Originally posted by CarlosT
It means that your thread garnered few views in relation to the responses you got...
And is this something you just made up?

I've been on the internet since Mosaic and a 14400 modem, and I've never heard that term before.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  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
UCD Supply ST Transformer Options Juke425 Class D 0 28th July 2008 10:14 PM
Transformer choice for AudioSector Kit? artfuldodger Chip Amps 1 13th February 2008 10:27 AM
audiosector dac karma Chip Amps 3 7th December 2005 01:04 AM
5 channels, single transformer Moose Chip Amps 10 12th December 2004 04:18 PM
Options of Volume & transformer for group buy GC? JazzzSpazzz Chip Amps 0 9th March 2004 07:36 PM


New To Site? Need Help?

All times are GMT. The time now is 03:21 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