2sd669a/2sb669a - 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 23rd July 2008, 03:59 PM   #1
diyAudio Member
 
Join Date: Aug 2006
Default 2sd669a/2sb669a

hi does anyone know which transistors i could replace these with
2sd669a/2sb669a?
as purchacing finding these is becoming quite difficult

thanks
chris
  Reply With Quote
Old 23rd July 2008, 04:02 PM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Default 2sb649a/d669a

dalbani.co.uk
sell them and cheap.
__________________
regards Andrew T.
  Reply With Quote
Old 23rd July 2008, 04:04 PM   #3
diyAudio Member
 
Join Date: Sep 2007
Send a message via Yahoo to linuxguru
Close substitutes for 2sb649a/2sd669a:

2sb647a/2sd667a (lower Pd)
2sa1220a/2sc2690a
2sa1837/2sc4793 (lower Ic)
2sa1930/2sc5171 (higher Ic)
2sa965/2sc2235 (lower Ic)
2sa1013/2sc2383 (lower Ic)
  Reply With Quote
Old 23rd July 2008, 08:04 PM   #4
diyAudio Member
 
Join Date: Aug 2006
so you could'nt use bd139/bd140 even if the voltages of the application dont go over 30v?
  Reply With Quote
Old 24th July 2008, 09:21 AM   #5
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
2sb649a/d669a are 160Vce0 devices with a superb SOA characteristic.
bd139/140 is, comparatively, a low voltage transistor. @ 40Vce0 and 80Vce0 it can only pass about a quarter of the current of the 649/669
__________________
regards Andrew T.
  Reply With Quote
Old 24th July 2008, 09:41 AM   #6
Account disabled at member's request
 
Join Date: May 2006
Andrew, the link you provided is for nikko electronics, do you have much experience with them. What i would like to know is if they provide original factory products and not third party manufacturers. They prices are not cheap but i dont mind paying more but getting originals is more important to me. Im not only refering to the 2sd669 but to other trannies especially from sanyo, i see they have extensive list there.

The 2sd669/2sb649 is far superior to the bd components, there are others too, perhaps reddish75 could tell us what the duty of the 2sd669 parts would be, this way we could suggest other equivalents. If its for drivers of output stage then linuxgurus list is very good.

Alex
  Reply With Quote
Old 24th July 2008, 09:46 AM   #7
h_a is offline h_a  Europe
diyAudio Member
 
h_a's Avatar
 
Join Date: Sep 2006
Location: Graz, Austria
Dalbani does not carry these original Hitachi parts, only from other manufacturers. Mentioned Hitachi parts are out of production for several years now.

Have fun, Hannes
  Reply With Quote
Old 24th July 2008, 10:02 AM   #8
Account disabled at member's request
 
Join Date: May 2006
Hannes they maybe could be, there are still a lot of stocks lying around, originals are not hard to find here of 2sd669/2sb649 and go for about 0.50 euros here but only in the big citys. The problem with buying through the net is that one can never be sure if originals will be supplied although the dealers will always swear to this and in some instances dont even know the differences.
  Reply With Quote
Old 24th July 2008, 10:06 AM   #9
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
I have used Dalbani for most of my semicon supplies for the last 4years.
They are reliable, offer good service particularly on the one occasion the order went wrong. In the UK they are cheap but not the cheapest. Their range is extensive and they do seem to stock items that are difficult to source otherwise.
Some of their items are not originals but second source copies. I think their Sanyo's are all original.
I have bought thousands of devices from them and will continue to recommend Dalbani to UK DIYers.
__________________
regards Andrew T.
  Reply With Quote
Old 24th July 2008, 03:34 PM   #10
diyAudio Member
 
Join Date: Aug 2006
yeah sorry its for a nad 3020a, was just looking for something that has more availability than the afore mentioned devices
  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
Can you help me about 2sb649A/2sd669A Zeljko Solid State 31 25th October 2007 07:30 PM
2sb649a 2sd669a drivers jackinnj Swap Meet 0 20th September 2002 01:14 PM


New To Site? Need Help?

All times are GMT. The time now is 11:51 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