Caps/Inductors for a Filter - diyAudio
Go Back   Home > Forums > Design & Build > Parts
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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 12th November 2007, 11:30 PM   #1
diyAudio Member
Join Date: Nov 2007
Default Caps/Inductors for a Filter

Hey I'm new at this stuff, but I was wondering if there was any recommendations for Caps and inductors to use in an Hi-fi audio filter. I am going to be making a 2nd order Butterworth filter.

The general consensus from what I have read is that polypropylene cap's are the way to go, and either air core or powder core inductors. What are the advantages /disadvantages for the inductors. Also what is the ideal way for choosing which cap value to use?

  Reply With Quote
Old 13th November 2007, 12:15 AM   #2
diyAudio Member
Join Date: Nov 2002
Would these be usable?
Attached Images
File Type: jpg pb120033.jpg (62.3 KB, 101 views)
  Reply With Quote
Old 13th November 2007, 07:51 PM   #3
gootee is offline gootee  United States
diyAudio Member
Join Date: Nov 2006
Location: Indiana
Blog Entries: 1
If you only need small cap values, also consider using polystyrene.

I usually have to choose cap and inductor values based at least partially on what's available that has the specs I need, and at what cost and size penalties. Often, for filters, the C and L values will have an inverse type of relationship. You will want to design the filter so that the C and L values fall within practical ranges of values, for the types you want to use.

- Tom Gootee
  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
Passive Analog filter inductors Bernhard Digital Source 9 25th April 2007 06:42 PM
HF filter inductors for signal path cathode_leak Tubes / Valves 3 12th May 2005 10:32 AM
Looking for Inductors for use in Pi filter vsr123 Swap Meet 0 16th April 2003 01:43 AM
Hammond 159ZL as inductors in a Pi-filter? mats73 Pass Labs 7 8th April 2003 07:30 AM
Optimum placement of inductors in CLC filter rwagter Pass Labs 4 18th November 2002 10:59 PM

New To Site? Need Help?

All times are GMT. The time now is 06:37 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