fairchild find? - 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 27th April 2005, 12:30 PM   #1
diyAudio Member
 
tinkerbell's Avatar
 
Join Date: Feb 2005
Location: Sydney
Send a message via AIM to tinkerbell Send a message via MSN to tinkerbell Send a message via Yahoo to tinkerbell
Default fairchild find?

hi, i just found these little black boxes full of semi's that i remember buying at a yard sale when i was a kid - mostly because i think they "looked expensive"

anyways, in each box there are:

1 x AY9171
1 x AY8171
1 x 2N3638A
1 x 2N3643
1 x SE4010
1 x 2N4250
1 x 2N3565

and i have two matching boxes...

the base of the box states that the AY9171 is PNP and the AY8171 is NPN and they are rated at 35W Max. Power T.C 25'C

basically - what can i do with these?

i assume it woudl make a great stereo 35W amplifier module, but i have no schematic, nor do i know how to create one?

any advice woudl be good,

if they are junk - i will forget about it, but if they are not 'junk', it could be a worthwhile project?

attached is pic
Attached Images
File Type: jpg fairchild001.jpg (78.2 KB, 435 views)
  Reply With Quote
Old 27th April 2005, 01:04 PM   #2
diyAudio Member
 
tinkerbell's Avatar
 
Join Date: Feb 2005
Location: Sydney
Send a message via AIM to tinkerbell Send a message via MSN to tinkerbell Send a message via Yahoo to tinkerbell
BTW - the 'AY' transistors are smaller sized T066 packages...
  Reply With Quote
Old 27th April 2005, 01:15 PM   #3
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
these would appear to date from the early days of Fairchild -- before the group left to form National Semi -- the company itself has gone through many corporate guises over the past 40 years -- perhaps SY could opine. there are people who collect this stuff -- perhaps a computer museum in OZ?

http://semiconductormuseum.com/Museum_Index.htm
http://www.computerhistory.org/about/
  Reply With Quote
Old 28th April 2005, 07:46 AM   #4
diyAudio Member
 
tinkerbell's Avatar
 
Join Date: Feb 2005
Location: Sydney
Send a message via AIM to tinkerbell Send a message via MSN to tinkerbell Send a message via Yahoo to tinkerbell
hmmm, so it would not be worth using these old devices?
  Reply With Quote
Old 28th April 2005, 11:08 PM   #5
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
they are probably classified as "unobtanium" --
  Reply With Quote
Old 29th April 2005, 02:04 AM   #6
Stocker is offline Stocker  United States
diyAudio Member
 
Join Date: Dec 2003
Location: Austin
If you can find the datasheets, cook something up for yourself. Replacements might be hard to come by, so be sure to triple-check the circuit and connections first, but why not use what you have, if it still works?
__________________
Jesus loves you.
  Reply With Quote
Old 29th April 2005, 05:52 AM   #7
diyAudio Member
 
tinkerbell's Avatar
 
Join Date: Feb 2005
Location: Sydney
Send a message via AIM to tinkerbell Send a message via MSN to tinkerbell Send a message via Yahoo to tinkerbell
that is the problem - datasheets exist for all but the AY T066 devices
  Reply With Quote
Old 27th April 2012, 10:22 AM   #8
diyAudio Member
 
Join Date: Apr 2012
Location: Melbourne
TInkerbell,
I know this is an old thread, and an outside chance, but if you still have this transistor pack and don't need them, I'll buy them from you. I really need only an AY9171 but would buy the lot if the price is right. I'm repairing a Playmaster 136.
cheers
Anton
  Reply With Quote
Old 28th April 2012, 01:15 AM   #9
diyAudio Member
 
dchisholm's Avatar
 
Join Date: Mar 2011
Location: St Louis, Mo
With those thermal coupling clips I'll bet it's the semiconductor compliment to build an amplifier (or perhaps some other device) documented in an application note or magazine article someplace. The intended circuit showcases the capabilities of some recently-introduced (at that time) component. Would be REALLY cool (and a potential museum exhibit) if you could locate the documentation that goes with the parts.

With the styrofoam packing materials, this is OBVIOUSLY before anybody got concerned about ESD. My guess would be late 1960's.

Dale

(Does this get the week's award for thread necromancy?)
  Reply With Quote
Old 28th April 2012, 02:26 AM   #10
diyAudio Member
 
Join Date: Apr 2012
Location: Melbourne
Hi dChisholm,
The amplifier was presented in an Australian hobby magazine to build in Dec 72/Jan 73, to showcase a transistor complement newly introduced by Fairchild. The transistor 'pack' was sold direct by Fairchild in Australia at the time. I do have a copy of the original mag article but it does not have detailed app notes for the transistors themselves. I can't post these to this forum however. The device list in the OP posting is correct.
cheers
Anton
  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
Fairchild Reverbertron 2???? Newpaltzwonder Parts 4 27th May 2011 01:13 PM
Where to find Harris/Fairchild IRF9610?? spzzzzkt Pass Labs 24 19th January 2008 03:33 AM
What is D65AB from Fairchild? stef1777 Parts 0 29th November 2007 12:22 PM
Fairchild amp application blink Solid State 12 15th December 2005 10:45 AM
SOZ PSU & Fairchild MOSFET MEGA_amp Pass Labs 3 6th November 2003 04:14 AM


New To Site? Need Help?

All times are GMT. The time now is 09:06 PM.


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