Mystery Amplifier - check it out - 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 4th December 2004, 04:22 PM   #1
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Default Mystery Amplifier - check it out

Funny thing about DIY, its got me visiting surplus stores looking for chassis, heat sinks, and other DIY matierials. Picked up this for $20, kind of expensive for "junk" but figured I could use the heat sinks. (Its the one on the right, the one on the left is my BOSOZ preamp shown for scale. See the preamp here).

Looks like an amplifier, its got lots of transistors and high power resistors. A real work of art, it will be a shame to take it apart. Looks military. Its pretty massive, perhaps suitable for an Aleph X or something?

Anyone know what this is? Ideas for the parts, are they any good? Was it a good deal or did I spend too much?
Attached Images
File Type: jpg mystery1.jpg (94.5 KB, 2101 views)
  Reply With Quote
Old 4th December 2004, 04:24 PM   #2
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Default Picture 2

A second pic
Attached Images
File Type: jpg mystery2.jpg (75.8 KB, 1865 views)
  Reply With Quote
Old 4th December 2004, 04:26 PM   #3
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Default Picture 3

A third picture
Attached Images
File Type: jpg mystery3.jpg (74.2 KB, 1732 views)
  Reply With Quote
Old 4th December 2004, 04:27 PM   #4
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Default Fourth pic

A fourth picture. Lots of power resistors, power transistors, power diodes.
Attached Images
File Type: jpg mystery4.jpg (86.7 KB, 1736 views)
  Reply With Quote
Old 4th December 2004, 05:40 PM   #5
diyAudio Member
 
john curl's Avatar
 
Join Date: Jul 2003
Location: berkeley ca
It looks like an industrial quality motor drive amplifier. It is usually relatively low voltage, high current, with a current output rather than voltage output. It will have to be completely changed to be useful, but the heatsink, itself, is worth what you paid. You can put a whisper fan on the end and still get good cooling, however, you must use a fan.
  Reply With Quote
Old 4th December 2004, 11:26 PM   #6
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
The esteemed Mr. Curl is quite correct... but I can add one thing.
The heatsinks do come apart, and you get 4 very nice extrusions
which can be used vertically for pretty decent convection cooling
applications, but of course not at the same power levels that you
could with the original fan blasted method.

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 4th December 2004, 11:32 PM   #7
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
Quote:
Originally posted by john curl
It looks like an industrial quality motor drive amplifier. It is usually relatively low voltage, high current, with a current output rather than voltage output. It will have to be completely changed to be useful, but the heatsink, itself, is worth what you paid. You can put a whisper fan on the end and still get good cooling, however, you must use a fan.
Maybe you can use it as it is...current amps are very HOT nowadays (pun intended)...

Arne K
__________________
Don't believe everything you think...
  Reply With Quote
Old 5th December 2004, 06:08 AM   #8
diyAudio Member
 
thomas997's Avatar
 
Join Date: Feb 2004
Location: Vancouver
Nice buy for 20$
  Reply With Quote
Old 5th December 2004, 09:39 AM   #9
NUTTTR is offline NUTTTR  Australia
diyAudio Member
 
Join Date: Nov 2004
Location: Australia!
Looks like a early krell amp, almost The heatsinks are the same!
And they also used TO-3's..... good buy! Good heatsinks too
Aaron
  Reply With Quote
Old 5th December 2004, 01:39 PM   #10
diyAudio Member
 
jacco vermeulen's Avatar
 
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
i see lots of 600 Volt Triac's, Thyristors and high power resistors.

Maybe someone tried using a Krill as a motor controller ?
__________________
The buck stops Here
  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
Mystery Tube Amplifier -- Help????? poynton Tubes / Valves 15 10th December 2008 05:41 PM
Mystery amplifier ... no clue? lineup Solid State 4 6th September 2008 09:45 AM
Differential amplifier mystery? klitgt Digital Source 0 7th March 2006 02:07 PM
Sanity check - designing my speaker to be 8ohm amplifier friendly. owdi Multi-Way 4 1st November 2005 10:08 PM
Another Amplifier Check Please zox2003 Solid State 28 7th April 2005 11:22 PM


New To Site? Need Help?

All times are GMT. The time now is 02:11 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