Smoothing Cap: ESR or Capacitance - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 23rd February 2008, 04:42 PM   #1
kptseng is offline kptseng  Singapore
diyAudio Member
Join Date: Mar 2004
Location: Equator
Default Smoothing Cap: ESR or Capacitance


Am selecting smooting caps for my Amp but have restriction of space (recap purpose).
I have selected either BC058 or BC056.

The original was using 4,700uF customised BHC caps.

For the space I can only get BC058 at 3,300uF to fit, ESR at 57mOhm, and Z at 33mOhm.
Alternative is BC056 at 4,700uF but the ESR is higher at 65mOhm and Z at 52mOhm.

So which is better?
  Reply With Quote
Old 23rd February 2008, 05:14 PM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
I'd be tempted to go with the low ESR 3300uF. But, what is there at present?
What is the existing current draw?
What is the existing ripple voltage?
What will be the effect on the downstream circuits if you make the change?
Make informed decisions.
regards Andrew T.
Sent from my desktop computer using a keyboard
  Reply With Quote
Old 23rd February 2008, 05:23 PM   #3
kptseng is offline kptseng  Singapore
diyAudio Member
Join Date: Mar 2004
Location: Equator
Hi Andrew,
Thanks for the reply.
I really don;t knwo what is the current draw but this is a 50W amp.
The existing cap has Ripple spec at 2.52A and the BC has 3.14A, so I guess except for the Capacitance, the BC is better than the existing one.

Anyway I'll go for the the 3,300uF and if they sound worse then I'll just fit the old one back.

  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
Help sizing psu smoothing cap riotubes Parts 5 8th July 2009 07:07 PM
Smoothing Cap = Noise Source? blindsjc Tubes / Valves 2 4th October 2007 04:01 PM
(1/12th etc..) Octave Smoothing Algorithm digidocs Multi-Way 1 14th February 2007 07:37 AM
PSU Smoothing Caps (how many?) MWP Chip Amps 3 7th September 2004 03:57 AM
HV smoothing capacitors DeXXSter Tubes / Valves 8 11th December 2001 10:10 PM

New To Site? Need Help?

All times are GMT. The time now is 11:50 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