Audio Amplifier protections - 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 28th February 2007, 11:52 PM   #1
diyAudio Member
 
Join Date: Aug 2006
Location: Buenos Aires
Send a message via MSN to aguantesoda
Default Audio Amplifier protections

¡Hola!, trato de hacer una protección para los Tips, y los Parlantes, para mi amplificador de audio, pero no sé como realizarlo.

Las características:

Vcc: 45 - 0 - 45
RL: 8 ohms

Si podés ayudarme...
Acá está el circuito.

Hello, I am trying to make a protection for the Tips, and the speakers, for my audio amplifier, but i do not know how.

The characteristics:

Vcc: 45 - 0 - 45
RL: 8 ohms

If you can help me...
Here is the circuit.
Attached Images
File Type: jpg amplificador con tips.jpg (51.4 KB, 750 views)
  Reply With Quote
Old 1st March 2007, 03:23 AM   #2
gni is offline gni  United States
diyAudio Member
 
gni's Avatar
 
Join Date: Sep 2006
Try http://sound.westhost.com/
  Reply With Quote
Old 1st March 2007, 10:32 AM   #3
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default Intall, please, the missed zobel filter.

Also the third output base was missed....just complete in your diagram...those bases are joined together.

I do not know why people forgot the stop resistors in series with the output bases...well...if working this way it is OK!

regards,

Carlos
Attached Images
File Type: jpg install the missed.jpg (57.2 KB, 556 views)
  Reply With Quote
Old 1st March 2007, 03:51 PM   #4
diyAudio Member
 
Join Date: Aug 2006
Location: Buenos Aires
Send a message via MSN to aguantesoda
If a problem happens in the amplifier; the Tips will be hottest, and it is dangerous for the Tips. So, how can I install a protection for it?

si ocurriese un problema en el amplificador; los tips comenzarán a calentar y podría llegar a dañarlos. Entoces, como hago para proteger a los tips; y evitar q se quemen?
Attached Images
File Type: jpg install the missed.jpg (55.7 KB, 470 views)
  Reply With Quote
Old 1st March 2007, 04:24 PM   #5
diyAudio Member
 
Join Date: Aug 2004
Location: Illinois
Install a thermal switch in series with the incoming AC voltage. Study the schematics and wiring layout of the Hafler DH series. Mount the thermal sensing switch on the heat sink next to the output devices.

http://www.hafler.com/techsupport/pd...00_amp_man.pdf
  Reply With Quote
Old 2nd March 2007, 02:20 PM   #6
diyAudio Member
 
Join Date: Aug 2006
Location: Buenos Aires
Send a message via MSN to aguantesoda
ok, thanks!
  Reply With Quote
Old 2nd March 2007, 04:13 PM   #7
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
that 39k collector load cannot be right.
1 or 2k should be nearer the required value.
__________________
regards Andrew T.
  Reply With Quote
Old 4th March 2007, 05:17 PM   #8
diyAudio Member
 
Join Date: Aug 2006
Location: Buenos Aires
Send a message via MSN to aguantesoda
Quote:
Originally posted by AndrewT
Hi,
that 39k collector load cannot be right.
1 or 2k should be nearer the required value.

yes, sorry; the 39k collector load it´s not right;
it is 3k.

here is the circuit
Attached Images
File Type: jpg amplificador con tips.jpg (54.4 KB, 362 views)
  Reply With Quote
Old 12th April 2007, 02:08 AM   #9
diyAudio Member
 
Join Date: Aug 2006
Location: Buenos Aires
Send a message via MSN to aguantesoda
I have made a Short Circuit Protection with an article post in http://sound.westhost.com/vi.htm

It is ok?

Source: + - 45V

RL: 4 u 8 ohms
Attached Images
File Type: jpg proteccion.jpg (52.0 KB, 314 views)
  Reply With Quote
Old 12th April 2007, 02:58 AM   #10
diyAudio Member
 
ifrythings's Avatar
 
Join Date: Oct 2005
I've seen lots of pro amps use this circuit (alost the same as yours but a bit modified

P.S look up uPC1237 IC, it can give you delay turn on to get rid of turn on/off thump , DC detection and load removal, and over-current load removal(via relay).
Attached Images
File Type: gif limiter.gif (14.2 KB, 297 views)
  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
Schematic: Audio Innovations, The first audio amplifier maartentje Tubes / Valves 22 25th February 2010 06:34 AM
OP AMP tutorial, protections,... pat allen Everything Else 5 16th January 2007 07:43 PM
dc and low freq protections cld1354 Multi-Way 3 1st January 2007 04:52 PM
Lm1875, Emc Protections alcuemar Chip Amps 3 24th May 2006 05:07 PM
Driver ratings and protections jackmcdowell Multi-Way 4 14th July 2004 10:08 AM


New To Site? Need Help?

All times are GMT. The time now is 07:19 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