Transformer voltage for lm3886 kit - Page 2 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Chipamp

Chipamp IC amp kits & PC boards from ChipAmp

Reply
 
Thread Tools Search this Thread
Old 21st July 2013, 06:55 PM   #11
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
OK
__________________
-------------------------------------------------------
A simulation free zone. Design it, build it, test it.
  Reply With Quote
Old 22nd July 2013, 12:51 PM   #12
davym is offline davym  Scotland
diyAudio Member
 
Join Date: Jul 2013
Location: Under a cloud
What a difference a day makes! I ordered the kit today, and I found a 2x22v transformer, it's more expensive but probably better quality and has options for banding or copper wrap.

Standard Range Toroidal Transformers: CM0300222: 300VA 230v to 2x22v
  Reply With Quote
Old 22nd July 2013, 12:57 PM   #13
davym is offline davym  Scotland
diyAudio Member
 
Join Date: Jul 2013
Location: Under a cloud
I would like to build a passive pre in a separate box, would this drive the lm3886 ok (I will use short cables) or does the pot have to be fitted in the same box as the amp boards?

Davy
  Reply With Quote
Old 22nd July 2013, 01:17 PM   #14
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
As long as the gain of the amp is sufficient then passive preamp is a good option. It doesn't have to be in the same box as the power amp. Remember its the source component that drives the amp in such a case, CD players, DACs etc have high output levels, other sources may not.
__________________
-------------------------------------------------------
A simulation free zone. Design it, build it, test it.
  Reply With Quote
Old 22nd July 2013, 01:35 PM   #15
davym is offline davym  Scotland
diyAudio Member
 
Join Date: Jul 2013
Location: Under a cloud
Good news thanks. I recently built a headphone amp (cmoy) into one of these cases and it would be nice to have a matching case for the pre.

Silver Extruded Aluminium Enclosures and Accessories
  Reply With Quote
Old 22nd July 2013, 01:40 PM   #16
diyAudio Member
 
lanchile's Avatar
 
Join Date: Sep 2008
Location: AREA 51
it is better to build it in the same chassis. (the shorter...the better) 10K/25K will be a good choice.
__________________
Make it simple...Make it better!

Last edited by lanchile; 22nd July 2013 at 01:45 PM.
  Reply With Quote
Old 22nd July 2013, 02:28 PM   #17
davym is offline davym  Scotland
diyAudio Member
 
Join Date: Jul 2013
Location: Under a cloud
I had read that somewhere, I take it I need to build more in the style of a gain card with the power supply boards close to the amp boards and the transformer in a separate box? I want to get this right first time because I cant afford to make mistakes with case size and layout.
  Reply With Quote
Old 22nd July 2013, 04:11 PM   #18
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
The success or otherwise will come down to the wiring and actual implementation of the grounding. You don't need separate boxes as long as there is reasonable space to work.
__________________
-------------------------------------------------------
A simulation free zone. Design it, build it, test it.
  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
Using multiple voltage transformer to get higher voltage hondatech739 Power Supplies 20 1st February 2013 01:04 AM
FS: IVY-III Kit + One Placid HD BP Kit Combo + transformer chaos Swap Meet 0 17th December 2012 04:36 PM
transformer for LM3886 dual mono kit gonzalez Chip Amps 16 11th October 2008 09:55 AM
Rail voltage compared to transformer voltage SteveG Solid State 4 22nd July 2002 11:50 PM


New To Site? Need Help?

All times are GMT. The time now is 12:13 PM.


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