Power Supply Case Size - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 10th October 2010, 03:23 AM   #1
diyAudio Member
Join Date: Jun 2010
Default Power Supply Case Size

Hey all-

I'm working on enclosing the power supply for the mixer, but I was considering whether a small or a large case for the PSU is best.

(PSU details the way it appears on my workbench)
I've got four chassis-mounted transformers (largest one is the the size of a cube of floppy discs) and an auxiliary PCB-mount transformer on the right side, bridge rectifiers, smoothing caps, and the cooling circuit regulators in the center, and all other regulators on the left side. For controls, I'm using a key-operated switch for the master power switch, and an SPST switch with a red LED for the phantom power master switch. Around the back, I'm using an IEC power socket for AC in and DB-9 socket for DC out.

Is it best to use a small case that only has enough space for all the components or a large case?
  Reply With Quote
Old 10th October 2010, 05:47 AM   #2
dangus is offline dangus  Canada
diyAudio Member
Join Date: May 2004
Location: Vancouver Island
It depends. A compact case or chassis will tend to be stiffer, helpful if you have heavy components like transformers and chokes. On the other hand, a 17" (or so) box can be rack mounted. In either a studio or live application, there's bound to be a rack nearby. More space means you can keep electrolytic caps away from hot things, which should extend their life. And if you want to add something in the future, you've got space. And more space makes it easier to route wires neatly, or keep low-level stuff away from noisy AC. And it's just plain easier to work inside when there's more room.

DB9 wouldn't be my first choice for DC power. I feel it is a bad idea to use what is normally a data or signal connector for DC power. XLR connectors come with pin numbers greater than 3 (up to 7 or so), which aren't commonly encountered. They lock, will accept a decent size wire, and aren't too expensive.

(Other alternatives:
I'd go with an Amphenol military-style circular connector, but that's because I've got a bunch of them surplus. They're expensive and complicated to order because there are so many options. There's Jones connectors, which cheap, rugged and handle plenty of current and voltage, and come in various genders, mounting styles, and pin counts.)
  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
How do you calculate choke size in a power supply? Burnedfingers Tubes / Valves 25 5th January 2012 12:23 AM
DIY Audio Alchemy Power Station 2 Power supply PSU with case roscoeiii Swap Meet 2 29th May 2010 06:51 PM
What size power supply should I get for repair work? spooney Car Audio 3 6th December 2007 11:50 PM
chipamp case power supply karma Swap Meet 8 30th September 2005 06:07 PM
2 Aleph Amp Case + Power Supply WALTER BURKHARD Swap Meet 6 13th September 2005 11:37 AM

New To Site? Need Help?

All times are GMT. The time now is 10:41 PM.

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