Transistors for 80's vintage amps - 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 30th October 2009, 03:34 PM   #1
diyAudio Member
 
Join Date: Oct 2009
Location: North Florida
Default Transistors for 80's vintage amps

What is a good source for hard to find transistors in receivers like the Marantz
SR8100DC and other similar vintage early 80's receivers? I've tried the usual places like Digikey and Mouser and can't find output transistors for this receiver.

Thanks,
  Reply With Quote
Old 30th October 2009, 10:09 PM   #2
qsa is offline qsa  Germany
diyAudio Member
 
qsa's Avatar
 
Join Date: May 2007
Normally you can replace with todays devices

Are you looking for Mosfet or BJT ? TO3 or TO3 P

which devices do you need ?
  Reply With Quote
Old 30th October 2009, 11:49 PM   #3
diyAudio Member
 
Join Date: Oct 2009
Location: North Florida
Quote:
Originally Posted by qsa View Post
Normally you can replace with todays devices

Are you looking for Mosfet or BJT ? TO3 or TO3 P

which devices do you need ?
These are BJT types with the numbers 2SA1108 and 2SC2588. The others, (2SA1011 and 2Sc2344) I was able to find. The package type is a MT200.
I did find a 2SA1108, but can't find a 2SC2588.
  Reply With Quote
Old 31st October 2009, 10:32 AM   #4
qsa is offline qsa  Germany
diyAudio Member
 
qsa's Avatar
 
Join Date: May 2007
Sanken has a lot of MT200 devices

try to use similar devices with 200V, normally its work wonderful, but today MT200 is popular like TO3,....to expensive/pcs. for todays amplifier manufacturer.

To get TO3 replacement for obsolete devices in 20 - 40 years old Vintage Amps with better performance in Sound is very easy

Last edited by qsa; 31st October 2009 at 10:38 AM.
  Reply With Quote
Old 31st October 2009, 02:37 PM   #5
diyAudio Member
 
Join Date: Oct 2009
Location: North Florida
Quote:
Originally Posted by qsa View Post
Sanken has a lot of MT200 devices

try to use similar devices with 200V, normally its work wonderful, but today MT200 is popular like TO3,....to expensive/pcs. for todays amplifier manufacturer.

To get TO3 replacement for obsolete devices in 20 - 40 years old Vintage Amps with better performance in Sound is very easy
Thanks,
I did find the one transistor at Littlediode Ltd in England and ordered a couple from them. The rest I found in the USA. But, I am going to take your advice on future projects. I see a lot of these MT200 devices in 25 - 65 watt amps form the early 80's. Normally I serviced vintage and high end tube hifi and guitar amps, but of late I am having requests from people to service vintage transistor hifi amps and am running into more and more of these kinds of parts availability issues. So, substitutes are becoming a viable alternative to rescue these vintage receivers and amps form the dumpster.
  Reply With Quote
Old 31st October 2009, 04:01 PM   #6
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
i can guarantee you one thing !!!!

the original parts exist in Japan ....The only problem is that you, me, and the rest of the world cannot get in touch with the people that have them since these are small sub assembly companies that dont speak english . dont have web pages ( since they have nothing to advertise ) and can comunicate in any other way unless you are japanese and you really have a "nose'' for looking in to things like that

As we speak i am about to source parts from japan while i try to comunivate with 220 listed companies that are related to parts like that ....

No mater how many times and how many parts i ve been trying and listen too the best so far and unbeatable by far to any other was the 1302-3281 pair
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 31st October 2009, 10:40 PM   #7
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
It would be an interesting and informative exercise for you to convert to more common available transistors.
  Reply With Quote
Old 1st November 2009, 02:26 PM   #8
wg_ski is offline wg_ski  United States
diyAudio Member
 
Join Date: Oct 2007
Quote:
Originally Posted by archangele View Post
...but of late I am having requests from people to service vintage transistor hifi amps and am running into more and more of these kinds of parts availability issues. So, substitutes are becoming a viable alternative to rescue these vintage receivers and amps form the dumpster.
But if you put an ISC (or NTE!) part in place of a Sanken chances are the unit will end up in the dumpster - because they're not going to want to fix it TWICE.
Original MT200's are a **+(# if you just can't get them. Sometimes you'll just have to bite the bullet and put in TO-247's.
  Reply With Quote
Old 31st October 2013, 01:06 AM   #9
diyAudio Member
 
Join Date: Mar 2009
Location: West Palm Beach, Florida
Hello Folks,

Sorry to resurrect such an old thread, but, has anyone found an acceptable modern substitute for the 2SC2588A & 2SA1108A pair? I can not for the life of me, find the originals anywhere, and my buddy's old Marantz pm700 blew it's little brains out trying to drive a dead shorted speaker line, and subsequently requires 2 each of the aforementioned devices. Any ideas would be tremendously appreciated!
  Reply With Quote
Old 31st October 2013, 01:39 AM   #10
diyAudio Member
 
Join Date: Nov 2008
You could try the NTE Electronics replacement cross-reference. Their datasheets will give you enough info to find a suitable device. E
  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
vintage sansui transistors honsten Solid State 4 29th May 2010 02:59 PM
Looking For Output Transistors For Vintage Car Radio 65blkbkgt Car Audio 14 29th May 2010 02:58 PM
Vintage RCA amps Nathanshort Tubes / Valves 9 7th September 2009 05:21 PM
Tube amps from vintage RTR's? Brisso57 Tubes / Valves 5 19th February 2009 08:08 PM
Let's talk vintage Soundcraftsmen PCR-800 amps VintageDave Solid State 0 10th February 2008 07:31 PM


New To Site? Need Help?

All times are GMT. The time now is 04:51 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