High Power Amp With TDA7250... - 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 26th October 2002, 09:44 PM   #1
Account Disabled
 
Join Date: Jul 2002
Question High Power Amp With TDA7250...

I want to build a amp with TDA7250 and 6 tr' of
2SC3858 (200W 17A) and 6 tr' of 2SA1494
it is possible ?? for 4-2 Ohm AMPLIFIER... HIGH POWER
  Reply With Quote
Old 26th October 2002, 10:31 PM   #2
Account Disabled
 
Join Date: Jul 2002
I have a pic with 8 tr' and TDA7250 it is near from what i want to build... the pic from the site ..

But in the pic it is hard work... i want simple with TDA7250 and 12 tr' 2SC3858-2SA1494
Attached Images
File Type: jpg ksx4409_novy.jpg (62.5 KB, 1676 views)
  Reply With Quote
Old 27th October 2002, 11:42 AM   #3
Account Disabled
 
Join Date: Jul 2002
i need a circuit...
  Reply With Quote
Old 27th October 2002, 02:59 PM   #4
Account Disabled
 
Join Date: Jul 2002
it is work ??
Attached Images
File Type: gif dj.gif (31.0 KB, 1510 views)
  Reply With Quote
Old 27th October 2002, 04:35 PM   #5
Account Disabled
 
Join Date: Jul 2002
why no one answering???
  Reply With Quote
Old 27th October 2002, 05:16 PM   #6
diyAudio Member
 
Join Date: Apr 2002
heres a plan with pcb http://home.eunet.cz/rysanek/tda7250.gif
http://home.eunet.cz/rysanek/tda7250.pcb_en.html
  Reply With Quote
Old 27th October 2002, 07:22 PM   #7
diyAudio Member
 
Join Date: Aug 2002
Location: Belgium
Be careful with this chip though. It seems to oscillate very easily. I have made an amplifier with this one using the TIP142/147 darlingtons as driver. They didn't seem to be too happy with clipping though, but I have a feeling that has something to do with the fact I didn't put protection diodes on the drivers...
Take a look at my schematic. I also have the pcb's for that one.
Attached Images
File Type: png tda7250.png (9.8 KB, 1155 views)
  Reply With Quote
Old 27th October 2002, 07:36 PM   #8
Account Disabled
 
Join Date: Jul 2002
thanks !
but with 2SC3858 or 2SC5200 it is work?
  Reply With Quote
Old 27th October 2002, 08:14 PM   #9
diyAudio Member
 
Join Date: Aug 2002
Location: Belgium
Haven't got a clue. I gave up working on this project because I assumed it was limited to using darlingtons. Besides I don't like the tda7250 at all. It produced quite a lot of hum with me, and with this sort of ic's.. where do you begin looking eh?
I'm going to take my chanches with the TDA7293 wich seems to be a lot easier and compact...
  Reply With Quote
Old 27th October 2002, 09:53 PM   #10
diyAudio Member
 
Holger Barske's Avatar
 
Join Date: Jan 2001
Location: Ruhrgebiet
That TDA7250 thing doesn't really make sense to me. With +/-45V supply rails ypu can add as much output devices as you want, the 4 ohm power won't increase.
The only chance to get reasonable more power ist to use the both amplifiers in bridge mode.
I haven't read the specs of the TDA, nor have I looked at the DPW666 solution, but I would say that a good discrete front end won't make such a big amplifier much more expensive.
So why stick to that limited driver chip?
---
Holger
__________________
Best regards: Holger
www.holgerbarske.com - Deutschsprachiges Paradise-Support-Forum
  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
Power supply:Universal AC input/ Full range,High Efficiency, and High reliability hang Vendor's Bazaar 12 24th July 2009 03:46 AM
Wanted - High Power, High Voltage, Audio Frequency Transformer Manual. kimbal Tubes / Valves 4 11th May 2009 08:05 PM
high frequency high voltage power supply... moray james Planars & Exotics 6 23rd July 2008 07:57 PM
tda7250 arasuk Digital Source 1 22nd January 2004 04:19 PM


New To Site? Need Help?

All times are GMT. The time now is 03:59 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