Need Impedance Meter suggestions - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

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 12th December 2003, 12:52 AM   #1
diyAudio Member
 
e.lectronick's Avatar
 
Join Date: Feb 2002
Location: Ocean, NJ
Default Need Impedance Meter suggestions

Hi, folks
I've just been building my first set of speaker enclosures according to a friend's recommendations, and I need to get a decent impedance meter that won't cost me an arm and a leg.

Does anyone have any suggestions for which models to watch for?

Also, are there any alternatives to purchasing a meter? Can I rig up/use my Digital Multimeteror or Oscilloscope to test impedance?
-Thanks for any suggestions.
-Erik.
__________________
-Who put the Tribbles in the Quadrotriticale?
  Reply With Quote
Old 12th December 2003, 10:03 AM   #2
diyAudio Member
 
Join Date: Jul 2003
Location: Newcastle, Australia
Impedance will vary quite considerably with frequency, so if you want to plot the impedance curve for your speaker then I suggest you put your PC to use. Download Speaker Workshop (free), build up Wallin's impedance jig, and you're all set for very little outlay.

Cheers
  Reply With Quote
Old 13th December 2003, 10:58 PM   #3
just another
diyAudio Moderator
 
wintermute's Avatar
 
Join Date: Aug 2003
Location: Sydney
Blog Entries: 22
Default I'll second that suggestion

And go and check out Claudio's speaker workshop tutorial too!

http://planeta.terra.com.br/educaca...onegro/english/

and don't be impatient like me and start doing stuff before you have set it all up properly

regards,

Tony.
__________________
Any intelligence I may appear to have is purely artificial!
Some of my photos
  Reply With Quote
Old 13th December 2003, 11:26 PM   #4
just another
diyAudio Moderator
 
wintermute's Avatar
 
Join Date: Aug 2003
Location: Sydney
Blog Entries: 22
Hi Centauri,

You mentioned in another SW thread I started, about a mic preamp linked to from the speaker workshop site, but I can't find the link Do you have it?

I've ordered some WM-60AY mics from digikey, so I'll hopefully be getting some proper testing done after Christmas.

Regards,

Tony.

edit: Erik, there are two versions of the walin jig here is a link to the newer one http://www.gti.net/wallin/audio/jig2/jig2.html I bult the first one but I'm going to redo it I think.
__________________
Any intelligence I may appear to have is purely artificial!
Some of my photos
  Reply With Quote
Old 14th December 2003, 03:14 PM   #5
diyAudio Member
 
Join Date: Jul 2003
Location: Newcastle, Australia
Hi, Tony

Sorry, it wasn't linked directly from there but is on Eric's site - Old version preamp at http://www.gti.net/wallin/audio/preamp/preamp.html and newer version at http://www.gti.net/wallin/audio/preamp2/preamp2.html

I built the older vrsion, and it works fine.

Cheers
  Reply With Quote
Old 14th December 2003, 11:19 PM   #6
just another
diyAudio Moderator
 
wintermute's Avatar
 
Join Date: Aug 2003
Location: Sydney
Blog Entries: 22
Thanks Centauri,

I found those yesterday but wasn't sure if they were the ones. I'm kicking myself I didn't ask about this before I ordered my mics, as the opamp in the second preamp I can only find at farnell, and it's about $6 more than if I had have included it in my digikey order, would have made the $17US postage that bit more worth while ... Oh well.

Did you use veroboard/matrix board, or did you make a pcb? I've never made my own pcb's maybe time to give it a try.

Oh and that link I put in for Claudio's web site is broken (cut and paste didn't work......

It should be: http://planeta.terra.com.br/educacao...negro/english/

Regards,

Tony.
__________________
Any intelligence I may appear to have is purely artificial!
Some of my photos
  Reply With Quote
Old 15th December 2003, 01:14 PM   #7
diyAudio Member
 
Join Date: Jul 2003
Location: Newcastle, Australia
I used veroboard, and built the thing into an unused pro dynamic microphone housing - a battery compartment and jack socket (with battery switching) where the grille used to be, and a RCA socket at the normal connector end that my mic and long brass tube plugs into. This allows me to use the setup in a normal mic stand (although backwards), and keeps low level signals short. I used the original mic's on/off switch as the gain switch, however due to this being large and right in the middle of the area involved, I used 2 dual opamps instead of the single quad opamp - just made it that much easier to jam it all in...

Cheers
  Reply With Quote
Old 15th December 2003, 09:53 PM   #8
just another
diyAudio Moderator
 
wintermute's Avatar
 
Join Date: Aug 2003
Location: Sydney
Blog Entries: 22
Thanks Centauri. Think it's time for me to start ordering some bits

Regards,

Tony.
__________________
Any intelligence I may appear to have is purely artificial!
Some of my photos
  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
Toa EPM 104 impedance meter anatech Solid State 12 12th April 2013 12:34 PM
how to make this esr meter work with 250uA Panel meter dytln_02 Everything Else 2 27th January 2007 10:13 PM
inductance meter from a cheap meter? jarthel Parts 3 22nd September 2006 05:37 AM
Making a milliAmp meter, become a Volt meter redrabbit Power Supplies 11 26th May 2006 07:51 PM
t-amp vu meter and volt meter question.... rectaacies Class D 7 3rd February 2006 11:22 AM


New To Site? Need Help?

All times are GMT. The time now is 09:24 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