schematic needed: 3 band equaliser + gain stage - diyAudio
Go Back   Home > Forums > Source & Line > Analog Line Level

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

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 21st April 2011, 12:25 PM   #1
diyAudio Member
 
Join Date: Dec 2008
Location: bangalore
Default schematic needed: 3 band equaliser + gain stage

Kindly suggest me some good quality 3 band stereo equaliser and gain stage on a single board using tlo71/72/74 ics.If you have link for such cirrcuit with pcb layout design please post it.
thanks.
  Reply With Quote
Old 21st April 2011, 02:39 PM   #2
diyAudio Member
 
Join Date: Nov 2008
See the thread "Fender tmb circuit" from a few days ago. E
  Reply With Quote
Old 17th December 2012, 10:13 AM   #3
diyAudio Member
 
csom's Avatar
 
Join Date: Dec 2012
Location: Homeless, sweet homeless.
Hi sudhir
Here is a circuit that is thoroughly tested by me to my entire satisfaction.
3 band EQ
I used NE5532 with this. It is used in my present system. I tested its performance with many Indian Oldies and various genres. I am very happy I can say. Once you adjust it to tune your system, you won't have to touch it again.

I purchased a commercial board based on LM324 but the circuit I assembled from that site is way better than that both in terms of performance and simplicity.( please vide the attachment.)

And here is my current Eq.
http://www.diyaudio.com/forums/attac...-prototype.jpg
Attached Images
File Type: jpg eq board I bought.jpg (466.6 KB, 107 views)
__________________
Warm regards, Som

Last edited by csom; 17th December 2012 at 10:28 AM.
  Reply With Quote
Old 18th December 2012, 03:58 AM   #4
diyAudio Member
 
Join Date: Jul 2003
Location: Dona paula, Goa
An equaliser is a multichannel tone control. Search for tone controls with mid. Gain stage is very easy. Do some reading/learning. It never goes waste.

Gajanan Phadte
  Reply With Quote
Old 18th December 2012, 04:06 AM   #5
diyAudio Member
 
Join Date: Dec 2008
Location: bangalore
Quote:
Originally Posted by gmphadte View Post
An equaliser is a multichannel tone control. Search for tone controls with mid. Gain stage is very easy. Do some reading/learning. It never goes waste.

Gajanan Phadte
I can design a good 3 band tone/equalizer circuit because of reading/learning. More than a circuit i want a ready made pcb pattern because I dont know to use the pcb designing softwares and p to p is too much messy.Its better if you can help me with a pcb pattern.
thanks
sudhir.
  Reply With Quote
Old 18th December 2012, 10:21 AM   #6
diyAudio Member
 
csom's Avatar
 
Join Date: Dec 2012
Location: Homeless, sweet homeless.
Sudhir, as you can see in the diagram that I posted at #3 .... it uses a 470K Lin Pot for treble ( I am using a variable resistor for the time being),
a dual version of which is hardly available .

Could you please tell me how to modify the circuit using a dual 100K pot?

I will try to make the pcb.

Thank you.
__________________
Warm regards, Som

Last edited by csom; 18th December 2012 at 10:26 AM.
  Reply With Quote
Old 18th December 2012, 02:35 PM   #7
diyAudio Member
 
csom's Avatar
 
Join Date: Dec 2012
Location: Homeless, sweet homeless.
Also I would love to build a Eq circuit as per your design. Please consider this request.
__________________
Warm regards, Som
  Reply With Quote
Old 24th December 2012, 04:09 AM   #8
diyAudio Member
 
Join Date: Jul 2003
Location: Dona paula, Goa
PCB software is not needed for such a small job. Just take a graph sheet and place the components logically and join. U will make silly mistakes but it is good learning and experiencing how small amall things matter. In earlier days, they laid computers using such methods.

U can use paint software also.

If u r going to make a pcb yourself, that is another experience, if not made one earlier.

Gajanan Phadte
  Reply With Quote
Old 24th December 2012, 01:57 PM   #9
diyAudio Member
 
csom's Avatar
 
Join Date: Dec 2012
Location: Homeless, sweet homeless.
Quote:
Originally Posted by gmphadte View Post
...
If u r going to make a pcb yourself, that is another experience, if not made one earlier.
.......
I personally thank you Gajanan for your kind helpful input.

As regards me, I made some small PCBs earlier for my Hobby projects. And after spending some time with the feature restricted freeware version of Eagle, I found it great to suit my all small sized hobbyist's PCB needs.

But now, I need to make my PCBs a bit larger than Eagle allows with its freeware.

I tried Designspark too, but I am not very happy with it's auto routing at this stage.

I tried some linux based freeware PCB maker too.
But generally, the main problem with the Opensource Software Developers is that they treat every user like a co-developer having the same level of knowledge and merit. Hence, for this, sometimes they seriously lack userfriendliness and effortlessness ( except a very few ).

Since these are free, I can't complain but that makes us, the average ( or below the average user like me)users a bit frustrated when things don't work as expected or can not find the right tool in the interface and more, the documentation too is not methodically updated keeping pace with the existing current version.

Could you kindly recommend any good freeware ( windows platform preferable) that has no size limit, to make PCBs and has a little less steep learning curve and having good video tutorials?

Thank you.
__________________
Warm regards, Som

Last edited by csom; 24th December 2012 at 02:08 PM.
  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
Kef R105/3 Kube equaliser schematic jez Multi-Way 74 9th June 2013 04:30 AM
Old (2004) ,defunct diyaudiocraft 6C45/6Dj8 output stage schematic needed limono Digital Line Level 3 13th May 2010 12:25 AM
OPA549/541 at unity gain - schematic needed. nina Chip Amps 3 24th September 2007 02:46 PM
balanced line stage schematic needed jogas Tubes / Valves 3 11th September 2005 08:57 PM
ashley 31 band equaliser stereo yugaaa Swap Meet 0 16th February 2002 11:12 AM


New To Site? Need Help?

All times are GMT. The time now is 10:23 AM.


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