60W simple Audio amplifier with TL071 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 22nd October 2013, 02:33 AM   #1
Gost22 is offline Gost22  Bolivia
Banned
 
Join Date: Sep 2012
Location: San Ignatio de Velasco
Question 60W simple Audio amplifier with TL071

Hello guys!
I came across this circuit amplifier, so I wonder if this circuit will work well without oscillations?
What kind of sound quality to give so.
They gave some possible changes to the schematic in order to improve?
What operating amplifier (OPA-IC1), LF351, NE5534N or TL071 here would be most suited to the this amplifier??
Is may include the inclusion of the speaker output impedance of 4R?
Anybody can do a simulation of this circuit.
Thanks for your help and suggestions!
Attached Images
File Type: jpg Schematic-1.JPG (79.6 KB, 289 views)

Last edited by Gost22; 22nd October 2013 at 04:26 PM.
  Reply With Quote
Old 22nd October 2013, 06:50 AM   #2
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
Will latch up to the rail until you add a resistor from pin 3 to ground, try 47K.

Need an output Zobel, 10Ω+0.1F should do.

Choose a better opamp, the old bi-fet's will latch to the negative rail when you drive the amp hard.

There needs to be some small resistors in series with the diodes, there is not enough bias.

Bias pot won't work as drawn, will only reduce it further into class B.

Needs frequency compensation in the feedback loop.

I would add 1nF caps in parallel with R17 and R14.

I would change R18 and R13 to 4.7Ω

May need 47Ω in the base of Q1 and Q2.

Change the collector resistors to 0.22Ω, and add another 0.22Ω pair in the actual emitter circuit.
__________________
Candidates for the Darwin Award should not read this author.

Last edited by djk; 22nd October 2013 at 06:55 AM.
  Reply With Quote
Old 22nd October 2013, 03:55 PM   #3
Gost22 is offline Gost22  Bolivia
Banned
 
Join Date: Sep 2012
Location: San Ignatio de Velasco
Thumbs up Changes in the sematic

Quote:
Originally Posted by djk View Post
Will latch up to the rail until you add a resistor from pin 3 to ground, try 47K.

Need an output Zobel, 10Ω+0.1F should do.

Choose a better opamp, the old bi-fet's will latch to the negative rail when you drive the amp hard.

There needs to be some small resistors in series with the diodes, there is not enough bias.

Bias pot won't work as drawn, will only reduce it further into class B.

Needs frequency compensation in the feedback loop.

I would add 1nF caps in parallel with R17 and R14.

I would change R18 and R13 to 4.7Ω

May need 47Ω in the base of Q1 and Q2.

Change the collector resistors to 0.22Ω, and add another 0.22Ω pair in the actual emitter circuit.
Mr djk, thanks for are suggestions for some changes in the sematic!
Guys go on,....
Attached Images
File Type: jpg New Schematic-1.JPG (82.9 KB, 202 views)

Last edited by Gost22; 22nd October 2013 at 04:18 PM.
  Reply With Quote
Old 22nd October 2013, 04:21 PM   #4
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

Search on "Puccini", "Brio" and "Texan" amplifiers.
All use standard audio op-amps for the 1st stage.

rgds, sreten.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow
  Reply With Quote
Old 22nd October 2013, 04:28 PM   #5
Gost22 is offline Gost22  Bolivia
Banned
 
Join Date: Sep 2012
Location: San Ignatio de Velasco
Lightbulb Puccini audio schematic

Quote:
Originally Posted by sreten View Post
Hi,

Search on "Puccini", "Brio" and "Texan" amplifiers.
All use standard audio op-amps for the 1st stage.

rgds, sreten.
Hi sreten!
Give some website of these
Think of this schemtic!?
Thanks
Attached Images
File Type: jpg puccini_amp_schematic.JPG (74.4 KB, 185 views)

Last edited by Gost22; 22nd October 2013 at 04:39 PM.
  Reply With Quote
Old 22nd October 2013, 04:36 PM   #6
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Quote:
Originally Posted by Gost22 View Post
Hi sreten!
Give some websiteof these
Thanks
Hi,

You've got a problem using Google ?

rgds, sreten.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow
  Reply With Quote
Old 22nd October 2013, 04:39 PM   #7
Gost22 is offline Gost22  Bolivia
Banned
 
Join Date: Sep 2012
Location: San Ignatio de Velasco
Quote:
Originally Posted by sreten View Post
Hi,

You've got a problem using Google ?

rgds, sreten.
Yes for yahoo!?
  Reply With Quote
Old 22nd October 2013, 06:31 PM   #8
rafsky is offline rafsky  Italy
diyAudio Member
 
Join Date: Oct 2007
Send a message via MSN to rafsky
Quote:
Originally Posted by sreten View Post
Hi,

Search on "Puccini", "Brio" and "Texan" amplifiers.
All use standard audio op-amps for the 1st stage.

rgds, sreten.
The Puccini very old series use operational amplifier like NE5534, the new are fully discrete
  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
SIMPLE BUT EFICIENT AUDIO AMPLIFIER ! Radu1984 Solid State 7 19th September 2011 07:14 AM
6N11+TDA7293 60W+60W Amplifiers fn9mm Chip Amps 5 28th August 2011 12:37 PM
Kuroda TL071 60W FET Amp (1982) steph_tsf Solid State 18 28th August 2011 12:34 PM
Non Bootstraped amplifier 60W IrishboyM4 Solid State 14 23rd April 2007 10:53 PM
60w in 8 ohms ESP amplifier... Lisandro_P Solid State 15 19th April 2001 05:20 PM


New To Site? Need Help?

All times are GMT. The time now is 05:19 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