Clone Goldmund Amplifier - Page 6 - 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 May 2011, 03:14 PM   #51
diyAudio Member
 
Join Date: Mar 2008
Quote:
Originally Posted by jacco vermeulen View Post
You lot forget that the case of the Telos 1000 is the heatsink.
~10,000 square centimeters of surface (aka ~600 sq in.)
The heatsink is not connected to the case. Telos 1000 uses the same teflon spacers as used in the Telos 2500 and the same cut out in the back plate. Hope this helps.
Attached Images
File Type: jpg Telos 1000-2.JPG (98.8 KB, 1665 views)
  Reply With Quote
Old 4th May 2011, 04:32 PM   #52
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
Fancy teflon washers are not spacers, just part of the mechanical grounding routine.

The heatsink used is a Fischer SK56, a 6" length does ~0.35C/W (uncorrected).
Exterior surface of the heatsink is ~3000 square centimeters, the case has three times as much.
Given the power output of the Telos 1000, think how hot the heatsink would become if it were thermally isolated from the case.

http://img7.imageshack.us/img7/7262/img7x.jpg
__________________
2015 : World Cup Cat Hacky Sack
  Reply With Quote
Old 4th May 2011, 07:05 PM   #53
diyAudio Member
 
Join Date: Mar 2008
Quote:
Originally Posted by jacco vermeulen View Post
Fancy teflon washers are not spacers, just part of the mechanical grounding routine.

The heatsink used is a Fischer SK56, a 6" length does ~0.35C/W (uncorrected).
Exterior surface of the heatsink is ~3000 square centimeters, the case has three times as much.
Given the power output of the Telos 1000, think how hot the heatsink would become if it were thermally isolated from the case.

http://img7.imageshack.us/img7/7262/img7x.jpg
Yes, the heatsink gets very hot. This is from MM 28. You can see the same solution, the heatsink is isolated from the case.
Attached Images
File Type: jpg Heatsink.JPG (116.2 KB, 1593 views)
  Reply With Quote
Old 4th May 2011, 07:07 PM   #54
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
What do you call the yellow stuff ?

(each of the Allen bolts is a thermal bridge)
__________________
2015 : World Cup Cat Hacky Sack

Last edited by jacco vermeulen; 4th May 2011 at 07:11 PM.
  Reply With Quote
Old 4th May 2011, 07:20 PM   #55
diyAudio Member
 
Join Date: Mar 2008
Quote:
Originally Posted by jacco vermeulen View Post
What do you call the yellow stuff ?

(each of the Allen bolts is a thermal bridge)
It is a copper plate mounted on the heatsink only. Not connected to the case. Same design is used in the Telos but different size.
Attached Images
File Type: jpg Heatsink-2.JPG (96.0 KB, 1502 views)
  Reply With Quote
Old 4th May 2011, 07:57 PM   #56
cfan is offline cfan  United States
diyAudio Member
 
Join Date: Mar 2006
Location: Fremont, CA
Quote:
Originally Posted by jacco vermeulen View Post
Fancy teflon washers are not spacers, just part of the mechanical grounding routine.

The heatsink used is a Fischer SK56, a 6" length does ~0.35C/W (uncorrected).
Exterior surface of the heatsink is ~3000 square centimeters, the case has three times as much.
Given the power output of the Telos 1000, think how hot the heatsink would become if it were thermally isolated from the case.

http://img7.imageshack.us/img7/7262/img7x.jpg

You just simply can't use the cabinet as a heatsink. It's not technical but ergonomic and safety issues. Will you paid $$$$ for an amplifier that you can't put hand on it more than 20 seconds?
  Reply With Quote
Old 4th May 2011, 10:09 PM   #57
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
Quote:
Originally Posted by cfan View Post
You just simply can't use the cabinet as a heatsink.

How many examples would you like me to name ?
__________________
2015 : World Cup Cat Hacky Sack
  Reply With Quote
Old 5th May 2011, 12:00 AM   #58
cfan is offline cfan  United States
diyAudio Member
 
Join Date: Mar 2006
Location: Fremont, CA
I won't surprise that you can name 10 examples of other designs but we are talking about the monster expensive Goldmund. It's different.

Last edited by cfan; 5th May 2011 at 12:13 AM.
  Reply With Quote
Old 5th May 2011, 12:28 AM   #59
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
In the words of Mr Charles Hansen : GMAFB

Goldmund manufactures analog amps, efficiency rules for Class AB power amps apply for them as much as they do for other brands.
Goldmund can bump up the C/W number of the heatsink a little by using the back of the heatsink base plate as well for natural convection, but it will not be sufficient by a long shot to handle the average dissipation level of such a powerful amp.

Only way to get rid of that much heat is through the case, of which the Telos amps have plenty, both in air exposed surface and lbs, the Telos 1000 has at least 60lbs of aluminum in the panels alone.
Worst case max dissipation of a Class AB power amp can be as high as the nominal power figure in 8 ohm.
If the heatsink of a Telos 1000 would be totally isolated from the case, it could and would get hot enough to melt thermoplastics on it.
Not bragging, elementary thermodynamics for analog audio amplifiers.

(10 easily, even one twice as pricey as the Telos 1000)
__________________
2015 : World Cup Cat Hacky Sack
  Reply With Quote
Old 5th May 2011, 02:58 AM   #60
tcqanh is offline tcqanh  Viet Nam
diyAudio Member
 
Join Date: Apr 2011
Location: HoChiMinh city
Quote:
Originally Posted by oDoh5 View Post
How much dose it cost?
about $1k for all parts. is it worth ?

personally, I believe this is the best souding SS ampli I've heard comparing SS ampli the the market with the price under $4k.
  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
Goldmund Mimesis 3 Clone, World's Best Amplifier!!!! NagysAudio Solid State 128 8th December 2010 07:30 AM
Goldmund lumanauw Solid State 32 26th January 2006 04:08 PM
Proac 2.5 clone, what Amplifier kevinkuang Multi-Way 20 17th March 2005 12:21 AM
Goldmund Speakers audioPT Multi-Way 0 11th September 2002 09:52 AM


New To Site? Need Help?

All times are GMT. The time now is 02:30 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