Apex power op amps - Page 2 - 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 24th March 2008, 08:22 PM   #11
miklos is offline miklos  Canada
diyAudio Member
 
miklos's Avatar
 
Join Date: Jul 2004
Location: toronto
ps
Attached Images
File Type: jpg open-ps-pcb1 sm.jpg (99.2 KB, 476 views)
__________________
miklos
  Reply With Quote
Old 24th March 2008, 08:23 PM   #12
miklos is offline miklos  Canada
diyAudio Member
 
miklos's Avatar
 
Join Date: Jul 2004
Location: toronto
front
Attached Images
File Type: jpg box sm.jpg (60.1 KB, 416 views)
__________________
miklos
  Reply With Quote
Old 24th March 2008, 08:25 PM   #13
miklos is offline miklos  Canada
diyAudio Member
 
miklos's Avatar
 
Join Date: Jul 2004
Location: toronto
Here's the PDF file of the PA46;
Attached Files
File Type: pdf apex pa46.pdf (66.1 KB, 139 views)
__________________
miklos
  Reply With Quote
Old 24th March 2008, 08:28 PM   #14
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
Nice work

Unusual looks of the toroid transformer.
__________________
/Per-Anders (my first name) or P-A as my friends call me
Tube Buffered Gainclone in work |Thread || Diamond buffer |Thread for the group buy | Wiki
  Reply With Quote
Old 24th March 2008, 08:29 PM   #15
miklos is offline miklos  Canada
diyAudio Member
 
miklos's Avatar
 
Join Date: Jul 2004
Location: toronto
My friend ,who gave me the chips made one amp with the PA45's for O.Peterson. He liked it very much. I think this is an excellent sounding amp and it is easy to build.
__________________
miklos
  Reply With Quote
Old 24th March 2008, 08:33 PM   #16
miklos is offline miklos  Canada
diyAudio Member
 
miklos's Avatar
 
Join Date: Jul 2004
Location: toronto
Thanks. Almost everything is in this amp coming from surplus.
Except the input connectors and the knobs.
__________________
miklos
  Reply With Quote
Old 24th March 2008, 09:12 PM   #17
diyAudio Member
 
redrabbit's Avatar
 
Join Date: Oct 2004
I thrive on surplus stuff.
I only order from Digikey once a year.

We have a large CNC at work, for wood and aluminum....6 foot by 12 foot. I wonder if it can do small pcb's ??

I have some 3oz copper board.

=FB=
  Reply With Quote
Old 25th March 2008, 07:19 AM   #18
felixx is offline felixx  Romania
diyAudio Member
 
felixx's Avatar
 
Join Date: Feb 2005
Location: in center
Very nice,but tell a few words about the influence of the transformer (strayfield effect) to the chips.
Because of the poor distance from toroid to pcb maybe you have some "noise" on your speaker?
__________________
"I'm glad I can build my own mistakes."
https://picasaweb.google.com/115586837612433686520
  Reply With Quote
Old 25th March 2008, 03:55 PM   #19
miklos is offline miklos  Canada
diyAudio Member
 
miklos's Avatar
 
Join Date: Jul 2004
Location: toronto
The noise is 1mV RMS, I can hear it if I holding my ear close to the speaker. The speaker is a diy 2 way Audax ,HM170G0 woofer ans a tiny TW010P1 HF driver.
Attached Images
File Type: jpg audax spkr.jpg (78.9 KB, 320 views)
__________________
miklos
  Reply With Quote
Old 21st April 2010, 06:14 PM   #20
diyAudio Member
 
redrabbit's Avatar
 
Join Date: Oct 2004
Finished the PA12 amp.
  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
SMPS for diy audio amps and multi-channel diy amps (and their power supplies) tlparker Solid State 18 31st August 2006 10:39 AM
apex jr alesis amps 2020audio Chip Amps 7 22nd June 2005 10:33 AM
FS PA02 Power op-amps +/- 18v, 5 amps modifry Swap Meet 0 11th August 2004 07:45 PM
500 Watt Op Amps from Apex Microtechnology jasonc Chip Amps 22 26th March 2004 04:12 AM


New To Site? Need Help?

All times are GMT. The time now is 09:38 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