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
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.

  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: 7

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
  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.
“Instead of Rational Law, objective truths perceptible to any who will undergo the necessary intellectual discipline, Knowledge will degenerate into a riot of subjective visions. . ." - Auden
  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
Inductance loaded current amplifier stelios Solid State 7 1st December 2014 09:57 PM
increased choke inductance - recommended? cbutterworth Tubes / Valves 8 16th October 2007 04:18 PM
Gainclone, mains filter, and PSU inductance 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

New To Site? Need Help?

All times are GMT. The time now is 11:47 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright ©1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2