Jens Rasmussen Leach clone group buy - Page 15 - diyAudio
Go Back   Home > Forums > Commercial Sector > Group Buys

Group Buys Members group buys

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 25th September 2007, 10:52 PM   #141
diyAudio Member
 
Join Date: Apr 2007
A group buy for the heatsinks. Now that is a great idea. Thanks Al. who is up for it. The ones Jens used look pretty ok to me. Tad
  Reply With Quote
Old 25th September 2007, 10:59 PM   #142
hags is offline hags  United States
diyAudio Member
 
Join Date: Nov 2004
Location: Chain o' Lakes
Quote:
Originally posted by tryonziess
A group buy for the heatsinks. Now that is a great idea. Thanks Al. who is up for it. The ones Jens used look pretty ok to me. Tad

I'd go for a group buy of some Conrad heatsinks.

http://www.conradheatsinks.com/welcome.htm
  Reply With Quote
Old 25th September 2007, 11:22 PM   #143
diyAudio Member
 
Join Date: Apr 2007
The Conrad mf30x151 is list for 46.00 au. That is about 12 inches by 6 inches. that should work for the Leach. Shipping is going to be steep. TAd
  Reply With Quote
Old 26th September 2007, 06:54 AM   #144
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
would it make sense to make one big group buy but with three delivery addresses; Europe, North America rest of the world (Australia)?
Then local and cheaper distribution from a volunteer in each area.
__________________
regards Andrew T.
  Reply With Quote
Old 26th September 2007, 09:07 AM   #145
diyAudio Member
 
Join Date: Apr 2007
If I can locate the proper extrusion from the foundry we could buy it in 22 foot lengths and I could cut it to proper length in my shop. Suggestions on dimensions requested. I would not mind doing this. I would also benefit from a much reduced price. I shall start Googling for this.
Andrew has a good idea to help reduced shipping. Tad
  Reply With Quote
Old 26th September 2007, 10:06 AM   #146
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Quote:
Originally posted by tryonziess
If I can locate the proper extrusion from the foundry we could buy it in 22 foot lengths and I could cut it to proper length in my shop. Suggestions on dimensions requested. I would not mind doing this. I would also benefit from a much reduced price. I shall start Googling for this.
Andrew has a good idea to help reduced shipping. Tad

No,
the fins would run in the wrong direction.
The extrusion would be about 12inches (300mm) wide and 1.5 to 2.5inches (40 to 60mm) deep with a 3/8inch to half inch (10 to 13mm) backplate, Fins 3/4inch to 2inches high (20mm to 50mm) tapering from 5mm to 2mm at the tip and gaps between fins of 1/4 inch to 5/16inch (6mm to 8mm) or parallel faced fins @ 10% of height.
The cut length would be about 6inches (150mm).
These suggestion would do for both the 3pair and the 5pair at most normal supply voltages. The smaller fins might suit upto 300W output and the biggest fins upto 500Woutput for non PA duty.

The biggest of those recommendations would suit most of the ClassA designs on the Forum. There could be many orders if the price and carriage come in right.
__________________
regards Andrew T.
  Reply With Quote
Old 28th September 2007, 10:42 AM   #147
diyAudio Member
 
Join Date: Apr 2007
Default Heatsinks

I can not believe how much aluminum costs. Most of it is just recycled cans. You would think by the price it came from a gold mine. Tad
  Reply With Quote
Old 28th September 2007, 11:10 AM   #148
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Default Re: Heatsinks

Quote:
Originally posted by tryonziess
I can not believe how much aluminum costs. Most of it is just recycled cans. You would think by the price it came from a gold mine. Tad
I read a somewhat humorous equation, before the cost of electricity doubled;
Al=SE .. (SE=solidified electricity)
__________________
regards Andrew T.
  Reply With Quote
Old 28th September 2007, 03:18 PM   #149
diyAudio Member
 
Join Date: Apr 2007
Default AndrewT

I wonder how much electricity it would take for me to melt 10.000 soda cans and found my own heatsinks. I guess it depends on how much DIY I am willing to do. Tad
  Reply With Quote
Old 28th September 2007, 04:08 PM   #150
diyAudio Member
 
dudaindc's Avatar
 
Join Date: Sep 2005
Location: Metro Washington DC
Default Heatsink supplier

Hello all
Recently I have been buying heatsinks from this source.
Nice guy to deal with and he has special pricing for larger quantities.
I hope this helps.
Cheers!
  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
WTB:2 boards from Jens Rasmussen Leach clone group buy mpmarino Swap Meet 0 12th January 2009 11:53 AM


New To Site? Need Help?

All times are GMT. The time now is 12:40 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