Power supply capacitors - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 20th November 2000, 02:28 PM   #1
diyAudio Member
 
Join Date: Nov 2000
Location: Minnesota
I'm in the early stages of an amp layout, I'm trying to see If I can fit everything for a 4 channel 70-100 watt/channel class A/b amp in a package that will fit in my entertainment center. I wanted to go with class A, but even at 4*40 or 2*20+2*40 I won't have room for all the heatsink. (looking to bi-amp)
So right now I'm Looking for sources of capacitors suitible for power supplies. I'm looking at a supply voltage of around 90 volts. I want between 20,000 and 30,000 uf but would be willing and probably able to fit multiple caps of 5,000 or larger. Thanks for any help,

Wade
  Reply With Quote
Old 20th November 2000, 11:59 PM   #2
diyAudio Member
 
Join Date: Nov 2000
Location: Kansas
For a frame of reference I recently bought some Mallory computer grade electrolytics from Mouser, they are 75 VDC 37000 MFD and are about 145 mm tall and 75 mm in diameter. Pretty big! So I don't know, but these definitely take up a lot of space and the size and shape makes it pretty hard to fit them in a small chassis.













  Reply With Quote
Old 21st November 2000, 01:39 PM   #3
diyAudio Member
 
Join Date: Nov 2000
Location: Minnesota
Default lots of smal caps a couple big ones

75 volts should be plenty and give me room to expand in the future. I found some 75v 3100 uF Mallroy caps at C&H (surplus sales) for $2.50(they have others too) seems I have just enough room for 6/rail. Or 5 of another kind, or 2 of a third all giving capacitance values between 18,000 and 19,000. Any advice on what is better a lot of smaller caps or a few large caps.

Wade
  Reply With Quote
Old 21st November 2000, 11:47 PM   #4
diyAudio Member
 
vdi_nenna's Avatar
 
Join Date: Oct 2000
Location: PA, USA
Blog Entries: 1
Send a message via Yahoo to vdi_nenna
Lightbulb large or small caps

http://www.meci.com

http://www.mpja.com
  Reply With Quote
Old 21st November 2000, 11:51 PM   #5
diyAudio Member
 
vdi_nenna's Avatar
 
Join Date: Oct 2000
Location: PA, USA
Blog Entries: 1
Send a message via Yahoo to vdi_nenna
Default Not mpja

Sorry, mpja doesn't have caps, but they do have other electronics.

Try: http://www.apexjr.com
  Reply With Quote
Old 10th January 2001, 11:23 PM   #6
diyAudio Member
 
promitheus's Avatar
 
Join Date: Jan 2001
Location: Germany
Default try philips

I use the philips high current ones. They proved to be very good. I donīt know about their price compared to other ones.
  Reply With Quote
Old 12th February 2012, 04:14 AM   #7
diyAudio Member
 
Join Date: Jan 2012
Have you considered cascoding the output devices?
This makes them somewhat immune to power_supply ripple
at all frequencies, and may let you reduce the amount of
capacitance on the high-current rails.
  Reply With Quote
Old 12th February 2012, 11:02 AM   #8
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Why 90Vdc supply?
70W to 100W into 8ohms can be got from +-45Vdc to +-50Vdc. 32-0-32Vac to 35-0-35Vac transformers are suitable.
These PSUs need 63V capacitors. They will be smaller and cheaper than any 75V, 80V or 100V capacitors.
__________________
regards Andrew T.
  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
Toroids, Capacitors, Power Supply PCB FS swin1 Swap Meet 0 28th October 2008 01:20 PM
Power supply Capacitors Vivek Solid State 59 28th February 2008 07:11 PM
Seriese capacitors in power supply ? woody Everything Else 1 24th September 2006 05:20 PM
Power Supply Capacitors awhiteguy Parts 27 22nd November 2002 10:40 PM
Power supply capacitors wchick Pass Labs 12 12th August 2002 05:26 PM


New To Site? Need Help?

All times are GMT. The time now is 09:55 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright Đ1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2