Inductors made for crossover in an amp? - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 15th September 2004, 04:16 PM   #11
diyAudio Member
Sch3mat1c's Avatar
Join Date: Jan 2003
Location: Milwaukee, WI
Send a message via ICQ to Sch3mat1c Send a message via AIM to Sch3mat1c
My Coil Design and Construction Manual, by Babani Electronics Books, shows no equations, but tables for different contructions. Basically, you select an inductance from a list of common values, or from a nomograph to find other decimal values, then apply corrections to apply this data to a core of your choice (the ratios of data in the first table assumes one particular core). The assumption is made that you use a wire suitable for the current capacity, and the tables find a turns number which just happens to fill out the core. There are also tables for proper air gap, which the data assumes you use.

But that doesn't help you any, so I'll add: L = 3.2 * N^2 * mu * A * 10^-8 / l, where L is in henries, N is turns, mu is permeability, A is cross-sectional area of the core (center leg) in square inches and l is length of the magnetic path in inches. For generic transformer iron, mu = 1000 or so (up to 100,000 for mu metal).

RDH4 has a lot of info on the subject.

Seven Transistor Labs, LLC
Projects and Resources / Electronic Design and Consultation
  Reply With Quote
Old 16th September 2004, 02:25 AM   #12
diyAudio Moderator
JojoD818's Avatar
Join Date: Mar 2003
Location: searching...

I have checked local bookstores but no book like that here.

Thanks for the equation btw. I am so interested in choke making that if you have additional data about them please send me a copy at

  Reply With Quote
Old 16th September 2004, 11:28 AM   #13
diyAudio Member
Yugo's Avatar
Join Date: Jun 2004
Location: Ex-Ex Yu,very far from Ei factory
Default info fo PSU chokes

[QUOTE]Originally posted by JojoD818
[B]Just curious, why can't I find any details on winding a diy choke? I mean, we have the magnet wires, the E-I cores, covers and legs, the only thing missing is the number of turns and what size to use.

Radiotron Designer's Handbook is an excellent source for info regarding chokes and PSU.I wind my chokes using Hanna's method which is well described,and is in a way, empirical method,mostly.Just convert the values in metric numbers(if you need) and use the little graph for determing the gap,turns,etc....Haven't had any problems so far!

Bird lives!
  Reply With Quote
Old 16th September 2004, 04:01 PM   #14
diyAudio Moderator
JojoD818's Avatar
Join Date: Mar 2003
Location: searching...

Now I have to look for that handbook.
  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
Trade your crossover parts. Capacitors, inductors and resistors. owdi Swap Meet 0 21st August 2007 10:27 PM
Switching position of crossover inductors. Jay Multi-Way 0 8th August 2005 01:25 AM
Need help in desigining crossover inductors venki Multi-Way 5 14th June 2005 04:44 PM
can this crossover by made bi-ampable? cowanrg Multi-Way 3 28th August 2003 09:06 PM
impedence with self made crossover trespasser_guy Multi-Way 2 19th September 2002 12:39 AM

New To Site? Need Help?

All times are GMT. The time now is 11:23 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