Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

Centre tapped coil with in a coil - inductance?
Centre tapped coil with in a coil - inductance?
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 31st March 2010, 03:05 PM   #1
peskywinnets is offline peskywinnets  United Kingdom
diyAudio Member
Join Date: Mar 2010
Location: United Kingdom
Default Centre tapped coil with in a coil - inductance?

What happens if you wind a coil around an iron core, stop, centre tap it, then wind the same amount of turns around (the first coi) again? (you end up with a coil within a coil)

I'm particularly interested in what the inductance would be for each half.

For example I know that..... 100 turns of 0.3mm wire yields about 0.8mH

so for this particular coil scenario, I end up with ....

100 turns of 0.3mm wire = 0.8mH

ground tap

100 turns of 0.3mm wire = 0.8mH

if putting an AC signal through one half of the coil will it affect the other half? (yes I know each leg will require an inverted signal...but I'm wondering if the AC signal through one coil impacts the other, therefore playing havoc with the inductance aspect)
  Reply With Quote
Old 31st March 2010, 05:13 PM   #2
Bob Scott is offline Bob Scott  Canada
diyAudio Member
Join Date: Apr 2009
Yes. It becomes a poor transformer. Both sides are coupled to each other by the core.

The inductance of a coil is proportional to the square of the number of turns. However, the inductance fo two independent inductances in series is the sum of both.

The square formula only works if both windings are on the same core.
  Reply With Quote


Centre tapped coil with in a coil - inductance?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Voice coil inductance effect karagiosis Subwoofers 8 5th September 2009 04:04 PM
HiVi B3s voice coil inductance - How to calculate? chylld Full Range 2 15th January 2009 07:10 PM
Measuring voice-coil self-inductance Klimon Multi-Way 4 19th November 2006 12:23 PM
Can I use a POT to vary the inductance of coil.......... Gavinator68 Multi-Way 7 20th May 2005 03:05 PM
voice coil inductance VS transient response kan3 Multi-Way 12 9th February 2004 08:18 PM

New To Site? Need Help?

All times are GMT. The time now is 05:54 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio