Audio Transformer Inductance Question - diyAudio
Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

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 9th April 2007, 06:24 AM   #1
Wizard of Kelts
diyAudio Moderator
 
Join Date: Sep 2001
Location: Connecticut, The Nutmeg State
Default Audio Transformer Inductance Question

I drew up a circuit using a center tapped audio transformer as shown below. Instead of a loudspeaker, I used an 8 ohm resistor. Not really accurate, but I'm just using it for a start.

I was told that audo transformers have inductances of 1 to 5. Yet when I use this centertapped one, I get a response that droops so bad in the high range I am 18 dB down @ 2K Hz.

My understanding is that it is the bass which transformers have trouble with, but here it appears to be the high frequencies which suffer.

Here is the circuit schmatic-a 1:2 inductance ratio, a simple circuit.
Attached Images
File Type: gif transformer freq problem a.gif (5.1 KB, 66 views)
__________________
"A friend will help you move. A really good friend will help you move a body."
-Anonymous
  Reply With Quote
Old 9th April 2007, 06:28 AM   #2
Wizard of Kelts
diyAudio Moderator
 
Join Date: Sep 2001
Location: Connecticut, The Nutmeg State
Now here is the response. And the higher the inductance of the transformers, the more the tweeter range droops, not the low frequencies which seem undisturbed.

Anybody have any idea what inductance Xformer I should be looking for, for this 1:2 ratio?

And why does the high frequency response roll off-I'm sure it does not do that with high quality audio transformers.

Image will become apparent when the thumbnail is clicked.
Attached Images
File Type: gif transformer frq problem b.gif (14.3 KB, 54 views)
__________________
"A friend will help you move. A really good friend will help you move a body."
-Anonymous
  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
Audio transformer smile44 Parts 5 11th August 2008 04:26 PM
Audio Transformer design BudP Introductions 4 11th March 2007 10:41 PM
inductance and Q question kappa546 Multi-Way 6 10th March 2006 06:10 PM
Designing transformer leakage inductance DaBit Power Supplies 3 17th January 2006 09:08 PM
Winding an audio transformer mark_titano Tubes / Valves 3 24th February 2005 11:38 AM


New To Site? Need Help?

All times are GMT. The time now is 08:16 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