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 19th May 2011, 07:06 AM   #11
mjf is offline mjf  Austria
diyAudio Member
 
Join Date: Jan 2009
Location: upper austria/near linz
hello.
the foto is not very sharp on my old screen,but have a look if you have soldered v+ to the output........
greetings
  Reply With Quote
Old 20th May 2011, 01:16 PM   #12
PJN is offline PJN  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Pa, USA
Sregor,

That makes sense, I am using an old transformer and it is center tapped. It has only one ground and two leads. On my other builds I have always used torroids, with two separate grounds and leads, so I am unfamiliar how to wire up a CT trafo. All I did was to run the ground to both PSU boards. Can you provide some guidance as to how to properly hook up a CT trafo.

Thanks,

PJN
  Reply With Quote
Old 20th May 2011, 01:35 PM   #13
alexcp is offline alexcp  United States
diyAudio Member
 
alexcp's Avatar
 
Join Date: Jun 2009
Location: Florida
Blog Entries: 37
You can use a ct trafo with ChipAmp.com's PSU board, even though it wants two separate secondary windings. You'd have to connect the center tab to the ground and then to use only half of each of the two bridges by connecting one AC lead to one (the correct one) of the two AC inputs on either side of the board.
  Reply With Quote
Old 20th May 2011, 02:09 PM   #14
sregor is offline sregor  United States
diyAudio Member
 
Join Date: Jan 2006
Location: massachusetts
more info at: using the snubberized PSU board with CT trafos?
Pictures of the chip amp boards with CT on this page courtesy apex jr (no association) miscellaneous.html
There are other discussions - probably should be a sticky.
__________________
Steve
  Reply With Quote
Old 21st May 2011, 12:59 PM   #15
PJN is offline PJN  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Pa, USA
Thanks for your help guys, i appreciate it.

PJN
  Reply With Quote
Old 22nd May 2011, 12:22 PM   #16
PJN is offline PJN  United States
diyAudio Member
 
Join Date: Dec 2004
Location: Pa, USA
I got everything straightened out according to the info that you guy pointed me to on the CT trafo power supply and everything is up and running sucessfully. The DC offset on the two amps was -45 mv, and -48 mv, and installing Ci didn't make a difference so I left it out. I gave it a quick listen on some cheap junk speakers and it sounded clear without any hiss or hum. Now I need to throw every thing into a proper case and give it a serious listen. Thanks a lot for your help.

PJN
  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
ZDT3.5 build w/ chipamp active mains phidauex Multi-Way 9 22nd March 2011 08:49 PM
Strange Problem In Tube Amp Build nogoodnamesleft Tubes / Valves 19 26th January 2011 02:28 PM
First chipamp build need advice lm4780 chevy1965usa Chip Amps 10 5th March 2009 10:44 AM
Total cost to build a chipamp kit? sqlkev Chip Amps 20 25th May 2005 06:53 AM
Strange little problem (or maybe not so) elizard Chip Amps 8 4th January 2004 06:25 AM


New To Site? Need Help?

All times are GMT. The time now is 01:22 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