Toroid placement inside enclosure, stray field - diyAudio
Go Back   Home > Forums > Design & Build > Construction Tips
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Construction Tips Construction techniques and tips

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 11th December 2009, 12:42 PM   #1
remmelt is offline remmelt  Netherlands
diyAudio Member
Join Date: Nov 2009
Location: Amsterdam
Default Toroid placement inside enclosure, stray field

I'm trying to build a compact enclosure for my BrianGT 3886 dual mono amp. I'm going the full dual mono route: two toroidals + two PSU boards.

My questions are about the interference the stray field of the toroidals might cause.

1) I hear they're not supposed to be stacked one on top of the other. Is this true? (And why?)

I was thinking about putting the xformers on their sides, with the PSU boards in between.
2) How far apart do they need to be to be considered not stacked?
3) Will the transformers cause interference on the PSU or the amp board? Can I safely put the PSU board on top of or in between the transformers?

I'm going to include a sketch of my current plan. Crappy phone pic of a quick sketch, so bad quality, but you get the idea. The enclosure will be 130mm high (leaves 10mm on each side of the toroids), 185mm wide. Depth to be determined. There is 95mm between the tops of the transformers. The PSU boards are stacked in between, using standoffs. The amp boards are to the back, side by side for better heat dissipation.
The sketch shows the front view.

4) Any reason not to put the transformers on their sides? (Will they sag to the bottom? I could support them with some foam or something)
5) Heat dissipation for the rectifier diodes: would stacking the PSU boards like that cause a problem?

The transformers are Amplimo 2x22V 160VA.

Click the image to open in full size.
  Reply With Quote
Old 16th December 2009, 05:17 PM   #2
diyAudio Member
acold7dusta's Avatar
Join Date: Sep 2009
Location: Buffalo, NY
1. I wouldn't solely on the fact of the increased difficulty of mounting them, not to mention its bad design practice

3. not sure. In between, yes, but on top of, I would leave a half inch or so of clearance

4. I have seen high end manufacturers mount them upright in the front of the case (next to each other- ~1/2" apart) and I have also seen them mounted flat in the middle, with all boards verticle on each side

5. as long as they're not smothered, I think you'll be fine
  Reply With Quote


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
NAD power lamps inside the enclosure destroyer X Solid State 13 9th October 2008 04:27 PM
Driver placement & enclosure design help DPK Multi-Way 1 16th June 2005 08:37 PM
Need help on 3875 Rev 3 PCB placement in enclosure ransom peek Chip Amps 7 21st March 2005 08:19 PM
Opening a can of worms do you calculate the slope inside a TL enclosure Rino odorico Multi-Way 17 26th August 2002 05:57 PM

New To Site? Need Help?

All times are GMT. The time now is 04:16 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2