Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

My first DIY amplifier 20 years a go
My first DIY amplifier 20 years a go
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 24th June 2017, 01:26 AM   #591
gaborbela is offline gaborbela  Canada
diyAudio Member
 
Join Date: Sep 2005
Hi
Guys it may sound very stupid but I am tempted to use these Hitachi power device to replace the TIP type of power darlingtos...
Any constructive opinions, comments are welcomed

HTTP 301 This page has been moved

Can these device replace those darlingtons with minimum or no adjustments?

Greetings
  Reply With Quote
Old 24th June 2017, 08:02 AM   #592
AndrewT is offline AndrewT  Scotland
R.I.P.
 
Join Date: Jul 2004
Location: Scottish Borders
attach the datasheet.
Which post shows the sch?
__________________
regards Andrew T.
  Reply With Quote
Old 24th June 2017, 12:06 PM   #593
gaborbela is offline gaborbela  Canada
diyAudio Member
 
Join Date: Sep 2005
Hi Andrew

The Hitachi datasheet I posted with my question, to met opens but I add it again with the complementary
HTTP 301 This page has been moved
HTTP 301 This page has been moved

I post the TIP147 & 142 so it will be easier to look it up.

http://www.st.com/content/ccc/resour...CD00000914.pdf

The amplifier schematic one page back post 582
The reason I do not post direct I have an old LTspice IV software when I open with that the darlington devices are missing.
You may have something better

My question remain can I use those Hitachi devices to replace the TIP..
Greetings
  Reply With Quote
Old 25th June 2017, 02:36 AM   #594
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
My first DIY amplifier 20 years a go
Hi gaborbela,
I can't see the schematic, but you can't replace a darlington transistor with a normal transistor. You would need to adjust your bias circuit to compensate for the different Vbe drop. The other change will be that the Vas sees a greater load variation because the current gain is lower. If they are both darlington types, then the change should be pretty easy. I don't know of any Japanese darlington audio outputs though.

-Chris
__________________
"Just because you can, doesn't mean you should" my Wife
  Reply With Quote
Old 25th June 2017, 03:00 AM   #595
ashok is offline ashok
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
My first DIY amplifier 20 years a go
The 2SD1559/2SB1079 are Darlingtons from Renesas. It can be used. It is rated 100V 20 Amps ! TIP142/147 is 100V 10 Amps. There is a slight difference in power dissipation but that shouldn't matter here.
__________________
AM
  Reply With Quote

Reply


My first DIY amplifier 20 years a goHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
camelot arthur dac 20 years old inertial Digital Line Level 5 22nd December 2012 09:57 AM
My best sound amplifier of these last 20 years audiodesign Solid State 22 28th August 2011 10:54 PM
new speakers after 20 years sys3 Multi-Way 5 28th May 2006 04:08 AM
Pic: 20 years old wasted on Xmas! Prune Everything Else 5 27th December 2004 10:01 AM
2N3055...supply for 20 years!! Netlist Swap Meet 5 11th June 2003 11:45 PM


New To Site? Need Help?

All times are GMT. The time now is 08:17 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki