Relationship Between Inductance And Current In Filter Choke - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 6th December 2006, 07:09 AM   #1
mark845 is offline mark845  United States
diyAudio Member
 
Join Date: Jul 2006
Default Relationship Between Inductance And Current In Filter Choke

I am making a power supply for a preamplifier. I need a 40 H choke at about 7-9 mA; however I cannot find chokes rated at this low milliamp range. Is there a mathematical or emperical relationship between choke inductance and current so that a choke rated for a greater current can be equally used? If so, what is the formula? I am aware that two 20 H chokes could be used, but I prefer to use a single choke.

Mark
  Reply With Quote
Old 6th December 2006, 07:18 AM   #2
diyAudio Member
 
Miles Prower's Avatar
 
Join Date: May 2005
Location: USA
Blog Entries: 6
^^^^^

Rectifier Applications Handbook.

Answers all those sorts of questions. However, if all you're pulling is a few mA, then you don't need a choke input filter anyway. With such a low current, a capacitor filter, either with just the "C" or a CRC will work just fine, won't take up so much space, and won't be so . $$$$$
__________________
There are no foxes in atheistholes
www.dolphin-hsl.com
  Reply With Quote
Old 6th December 2006, 11:58 AM   #3
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
If you're willing to drive up to Benicia, I've got a few extra chokes at just about that rating and would be glad to donate one.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
  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
increased choke inductance - recommended? cbutterworth Tubes / Valves 8 16th October 2007 04:18 PM
Gainclone, mains filter, and PSU inductance mr.duck Chip Amps 1 30th March 2007 04:38 PM
Ps Filter Cap or Choke? Dr.Frankenstein Power Supplies 3 11th March 2006 07:51 AM
measuring the power choke inductance confusion MaciekP Tubes / Valves 5 11th January 2005 11:41 PM
Inductance loaded current amplifier stelios Solid State 5 18th December 2002 03:26 PM


New To Site? Need Help?

All times are GMT. The time now is 02:13 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2