Help inductor. Parallel windings of thin wire to make one? - Page 9 - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

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 20th March 2017, 11:10 AM   #81
Butcher is offline Butcher  New Zealand
diyAudio Member
 
Butcher's Avatar
 
Join Date: Oct 2011
"Using my old rule of 1:1:4 (which may not be best)"

We will see. I like my own rules... Probably crash and burn, but learn something along the way!, possibly ???


"I wrap thick cotton/nylon thread in blanket stitch to help hold the turns together."

Andrew, must sound good then.


thanks for sharing directions instructions for home brew, self wound. I was feeling alone! Build your own equipment folks and be prepared to learn from mistakes....... Fun.
  Reply With Quote
Old 20th March 2017, 11:14 AM   #82
Butcher is offline Butcher  New Zealand
diyAudio Member
 
Butcher's Avatar
 
Join Date: Oct 2011
I nursing windings. Those little puppies can be rubbed against bricks. Sharp obstacles for us sensibles.. Producing inductors is fun. Should be undertaken and understood. Make one, stuff that up and learn but think about previous goal and move on...
  Reply With Quote
Old 21st March 2017, 05:29 AM   #83
Butcher is offline Butcher  New Zealand
diyAudio Member
 
Butcher's Avatar
 
Join Date: Oct 2011
I measured 2.48mH. I require 2.54mH, so not bad! I need to wind on some more windings.

I had a bad thought that paralleling two inductors in parallel would half the inductance. My theory was luckily incorrect!

Also, DCR is 2Ω per winding. Paralleled up equals 1Ω (measured). This is a tad high. But acceptable as 60L cabinets with 12" drivers is not so good living with neighbors close by... So Z = 8Ω + 1Ω DCR in series. I might have to attenuate mids and tweeter somewhat. As I run .FLACs from my PC, I can use digital eq.

Total weight is just under 300g.

With our 12dB / octave designs, I may have to use thicker wire. I will provide photo of my mates 6 foot high home-wound NZ hardwood speakers and also mine (old Philips ones) at later date.

Thanks.
Attached Images
File Type: jpg 2.48mH.jpg (79.4 KB, 25 views)
  Reply With Quote
Old 22nd March 2017, 03:15 AM   #84
Butcher is offline Butcher  New Zealand
diyAudio Member
 
Butcher's Avatar
 
Join Date: Oct 2011
Completed inductors. They are both 2.54mH and WELL within 1%.
Attached Images
File Type: jpg 2.54mH Done.jpg (104.3 KB, 17 views)
  Reply With Quote
Old 22nd March 2017, 03:20 AM   #85
DonVK is offline DonVK  Canada
diyAudio Member
 
DonVK's Avatar
 
Join Date: Jan 2017
Location: Ottawa
Quote:
Originally Posted by Butcher View Post
Completed inductors. They are both 2.54mH and WELL within 1%.
Congrats, they look good. Truly DIY.

Must be nice to know you can change them at will, without a 1 wk delay and shipping charges.
  Reply With Quote
Old 22nd March 2017, 03:39 AM   #86
Butcher is offline Butcher  New Zealand
diyAudio Member
 
Butcher's Avatar
 
Join Date: Oct 2011
Hey DonVK! Thanks. Yes, shipping charges, GST (tax), not made in China (as opposed to NZ!), and My coils are spot on in inductance.

I may have to wind with thicker copper though.

Final dimensions are 27mm former, 35mm wide and 0.8mm copper windings (x 2 to make 1.6mm dia.) are about 14mm deep.

I might mount the board and inductor to a sheet of ply and screw it to inside of cabinet. Finally I am going to line all inside panels with stuffing from an old duvet and use some yellow glass fiber insulation that was installed previously. When I stick my head into the 60L cabinets and yell, there is a $hit load of echo. Hopefully they will sounds good!
Attached Images
File Type: jpg 2.54mH Done b.jpg (116.2 KB, 16 views)

Last edited by Butcher; 22nd March 2017 at 03:42 AM.
  Reply With Quote
Old 22nd March 2017, 04:29 AM   #87
DonVK is offline DonVK  Canada
diyAudio Member
 
DonVK's Avatar
 
Join Date: Jan 2017
Location: Ottawa
Quote:
Originally Posted by Butcher View Post
Hey DonVK! Thanks. Yes, shipping charges, GST (tax), not made in China (as opposed to NZ!), and My coils are spot on in inductance.

I may have to wind with thicker copper though.

Final dimensions are 27mm former, 35mm wide and 0.8mm copper windings (x 2 to make 1.6mm dia.) are about 14mm deep.

I might mount the board and inductor to a sheet of ply and screw it to inside of cabinet. Finally I am going to line all inside panels with stuffing from an old duvet and use some yellow glass fiber insulation that was installed previously. When I stick my head into the 60L cabinets and yell, there is a $hit load of echo. Hopefully they will sounds good!
I buy sheets of this stuff for proto PCB work. You can cut it to shape, solder to one side and drill it easily for mounted components. The only place I can find large sheets is HK.

This is one sheet cut in half OmniDirectional - work in progress


https://www.amazon.ca/gp/product/B00...?ie=UTF8&psc=1

Last edited by DonVK; 22nd March 2017 at 04:29 AM. Reason: typo
  Reply With Quote
Old 22nd March 2017, 04:39 AM   #88
Butcher is offline Butcher  New Zealand
diyAudio Member
 
Butcher's Avatar
 
Join Date: Oct 2011
Thanks DonVK, yes Yuor prototype boards are looking good! Loop the legs of heavy components thru the board for extra support... I intend on getting my act together and make circuit boards. I have all them chemicals for photo etching. I just need to buy some lamps and mount inside an old flatbed scanner!

I like the sound of my 6dB board so far. I will build some 12dB ones for myself after completing my mates speakers...

Here is my setup being tested (sort of). Still some work to do. Boy it sounds much better! I want to crank it...
Attached Images
File Type: jpg Setup.jpg (84.1 KB, 15 views)
  Reply With Quote
Old 22nd March 2017, 05:52 AM   #89
Butcher is offline Butcher  New Zealand
diyAudio Member
 
Butcher's Avatar
 
Join Date: Oct 2011
Listening to some good music and allowing ears to adjust. Close eyes and focus into different instruments. Sounding real good... (Not quiet finished yet).
Attached Images
File Type: jpg Set-Up.jpg (47.4 KB, 13 views)
  Reply With Quote
Old 22nd March 2017, 09:24 PM   #90
DonVK is offline DonVK  Canada
diyAudio Member
 
DonVK's Avatar
 
Join Date: Jan 2017
Location: Ottawa
Quote:
Originally Posted by Butcher View Post
Listening to some good music and allowing ears to adjust. Close eyes and focus into different instruments. Sounding real good... (Not quiet finished yet).
Looks like you have some vintage gear. Do you collect? or resourceful
  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
how to make a 2.0 mH inductor with 15 awg wire srinath Parts 32 3rd April 2015 11:29 AM
Output Transformer Windings in parallel apnneto Tubes / Valves 15 3rd February 2015 01:56 PM
In need really thin aluminium magnet wire!!! WrineX Planars & Exotics 20 2nd April 2009 06:00 PM
Parallel secondary windings jlm Pass Labs 6 27th March 2004 10:39 AM
Using thin wire between driver pcb and mosfets Lucas_G Pass Labs 4 15th August 2003 11:18 AM


New To Site? Need Help?

All times are GMT. The time now is 10:21 PM.


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
Wiki