What are these parts - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 21st January 2003, 06:38 PM   #1
diyAudio Member
Join Date: Sep 2002
Location: B/R , La.
Lightbulb What are these parts

I got a pair of custom amp that my uncle built. I am trying to figure out what the outputs are but have not been able to figure it out what they are. They are TO-3 case. They have printing and p/n that look like this.
4 4
571134 561049
7917 7917

there are four of each per channel. Does anyone know what they are and what can be used as replacement? I have tried to crossreference them but can find nothing.

any help appreciated,


  Reply With Quote
Old 21st January 2003, 09:33 PM   #2
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
Netlist's Avatar
Join Date: Jan 2003
Default TO3

571134 = 2SK134
561049 = 2SJ49
Both are Mosfets

7917 is date of manufacturing: Week 17 year 1979
the 4 = ?
Anyone: correct me if i'm wrong..

  Reply With Quote


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
Want to trade: PC parts for speaker parts. Spasticteapot Swap Meet 8 15th January 2007 01:02 PM
PARTS PARTS PARTS!!! Infocus Powerview 820, triplet, ballast, light, power supply!!! marioinla Swap Meet 1 31st August 2004 04:22 PM
Trade your DAC parts for chip amp parts jeff mai Swap Meet 3 12th July 2004 03:51 PM
Comparison of SMD parts to standard parts BrianGT Parts 0 2nd July 2002 09:09 PM

New To Site? Need Help?

All times are GMT. The time now is 07:13 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2