Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 7th February 2009, 10:05 PM   #2761
diyAudio Member
 
Join Date: Nov 2004
Location: Halifax, N.S.
Quote:
Originally posted by samsagaz
what about BER131-ND? are cheap
BER131-ND are made of "Q-Pad 3" material, which is electrically conductive. This may be fine in some cases though - it certainly has good thermal ratings.

-j
  Reply With Quote
Old 7th February 2009, 11:51 PM   #2762
ichiban is offline ichiban  United States
space charged
diyAudio Member
 
ichiban's Avatar
 
Join Date: Oct 2004
Location: Tonawanda
Quote:
Originally posted by Diomedian

quote:
Originally posted by samsagaz
what about BER131-ND? are cheap

BER131-ND are made of "Q-Pad 3" material, which is electrically conductive. This may be fine in some cases though - it certainly has good thermal ratings.

-j
These seem to be similar for only $US 0.25 each

Mouser Part #: 567-175-6-230P
Manufacturer Part #: 175-6-230P
Manufacturer: Wakefield
Description: Heatsink Accessories TO-220 .006" KAPTON
  Reply With Quote
Old 8th February 2009, 12:23 AM   #2763
Tea-Bag is offline Tea-Bag  United States
not politcally affiliated
diyAudio Member
 
Tea-Bag's Avatar
 
Join Date: Feb 2006
Location: Kennebunk
Blog Entries: 7
Quote:
Originally posted by ichiban


These seem to be similar for only $US 0.25 each

Mouser Part #: 567-175-6-230P
Manufacturer Part #: 175-6-230P
Manufacturer: Wakefield
Description: Heatsink Accessories TO-220 .006" KAPTON
to-220
too small, except for to-220 devices.

I am still looking for the ultimate mica to-3p to-247 insulator part # myself.
  Reply With Quote
Old 8th February 2009, 12:31 AM   #2764
diyAudio Member
 
Join Date: Jan 2006
Location: Ireland
Plus they're TO220 - you would need something a little bigger I think for Q3/4.


Mouser do have this one:

link


I think its the same size. TO247 is meant to be 16mm x 21mm (0.625"x0.875") and this pad is apparently 0.6" x 1".

I'm not sure if the holes will all line up correctly. I'll be placing an order with mouser and might buy a few just to see. Probably worth it at only 0.06c each.

Could someone have a look at this and confirm what I'm seeing?

Fran
  Reply With Quote
Old 8th February 2009, 07:55 AM   #2765
diyAudio Member
 
enzedone's Avatar
 
Join Date: Nov 2004
Location: New Zealand
Default Thermal pads

Fran

I bought a 400x400 sheet a couple of years back and have been sitting on it. Give me your sizes and i'll cut some up for ya. And send it over.

Way to go, for sorting the amp out...........

Brett
__________________
I realized that a major part of my job was to figure out how to use technology control to create economic force, or leverage, such that money and business flowed in Microsoft's direction” — Alex St.John, father of DirectX.
  Reply With Quote
Old 8th February 2009, 11:34 AM   #2766
diyAudio Member
 
Join Date: Jan 2006
Location: Ireland
Wow, thanks Brett.


Look, I'll probably buy some of those ones from Mouser. At least then we'll know if they work ok. I'll PM you my addess but look I don't want to put you out....


Fran
  Reply With Quote
Old 8th February 2009, 03:07 PM   #2767
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Quote:
Originally posted by Tea-Bag
I am still looking for the ultimate mica to-3p to-247 insulator part # myself.
I use the ones made by Keystone.


  Reply With Quote
Old 8th February 2009, 05:39 PM   #2768
labjr is offline labjr  United States
diyAudio Member
 
Join Date: Apr 2003
Location: MA
I'm searching for an enclosure and heatsinks. Does anyone know if the enclosure has to be all metal for shielding from noise and feedback etc. ?

I'm considering using a partially wooden enclusure.
  Reply With Quote
Old 8th February 2009, 06:00 PM   #2769
diyAudio Member
 
Phil Townsend's Avatar
 
Join Date: Jun 2004
Location: Santa Fe, New Mexico
Default Tell me why...

Nelson, why do you like the Mica insulators over the various other types...

Enquiring Minds and all that stuff.
__________________
Phil
Santa Fe
  Reply With Quote
Old 8th February 2009, 06:01 PM   #2770
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
to protect against electric noise/interference you must (completely) surround the circuit with a conductive cage/box. It does not have to be metal.
Wood is a fairly good insulator, so can't give any help.

To protect against magnetic fields you need something quite different. I don't know enough to give advice.
__________________
regards Andrew T.
  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
Rockford Fosgate Power 20001 bd amplifier power rating?? pachoorion Car Audio 8 8th May 2011 10:49 PM
Power transformers versus amplifier output power..what is your option? destroyer X Solid State 38 9th May 2009 05:23 PM
McIntosh Power Amplifier Power Guard johnnyrt Solid State 2 23rd August 2007 10:22 PM
Output power for a power amplifier Progg70 Solid State 33 10th September 2006 08:44 AM
Amplifier 3000 Wats Rms Power + Smps Higcht Power Bestiality MARAVILLASAUDIO Class D 1 5th November 2004 04:06 PM


New To Site? Need Help?

All times are GMT. The time now is 12:18 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