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 25th November 2003, 10:36 PM   #1
diyAudio Member
 
Super_BQ's Avatar
 
Join Date: Sep 2001
Location: New Zealand / Canada
Send a message via ICQ to Super_BQ Send a message via Yahoo to Super_BQ
Default Removable TO-220 - Sockets

Can someone comment on the use of TO-220 sockets? I think this may be a 1st in this forum to experiment.

I recently upgraded my BSOZ preamp to allow for "transistor swapping" just like how tube users can "tube roll" their valves for different sounds.

What sonic drawbacks are there to using these sockets? These were bought from Digikey and made by Molex/Waldom. The connection seems quite good.

http://dkc3.digikey.com/PDF/T033/0509.pdf

BQ
Attached Images
File Type: jpg to_220_socket.jpg (32.7 KB, 601 views)
__________________
Yellow People for a Yellow World
Vote for Super_BQ, the Asian Alternative
  Reply With Quote
Old 25th November 2003, 11:42 PM   #2
diyAudio Member
 
Join Date: May 2002
Location: Plano , TX
Send a message via AIM to jewilson
Default Sockets for T0220

I have found these test sockets for T0220 and T0247. However the only non test sockets I have found or the the Molex and their a marginal at best.


These Guys have test socket for all TO220 and TO247
http://www.loranger.com/loranger_edc...ates/index.php

If anyone else has a source let us know.
__________________
Jim W.
  Reply With Quote
Old 28th November 2003, 03:58 PM   #3
diyAudio Member
 
Join Date: Sep 2003
Location: New Jersey
Default Heat sink type?

The heat sink type is what I am looking for a long time! I was not able to find similar in Mouser or Digikey, or local shop.

I also search the Aavid Thermalloy catalog, but can not find it!

Where did you buy it from?


Thomas
  Reply With Quote
Old 28th November 2003, 05:11 PM   #4
diyAudio Member
 
Join Date: Sep 2001
Location: Salt Lake City
They have sinks like those at Ra-Elco in Salt Lake City for 50 cents each. Call and ask for Robert or Brian. 801-487-7749

Mark
  Reply With Quote
Old 29th November 2003, 09:05 PM   #5
diyAudio Member
 
Super_BQ's Avatar
 
Join Date: Sep 2001
Location: New Zealand / Canada
Send a message via ICQ to Super_BQ Send a message via Yahoo to Super_BQ
Default Heatsink

Thomas,

I salvaged all these small heatsinks from the local scrap metal recycler. Specifically, this heatsink came out of an old Mita photo copying machine. Believe me, it was not easy in dismantling these photocopiers just to get at those heatsinks.

I've managed to use all of them up on other projects and would love to find more. You're right, Digikey, Allied, Mouser don't carry them. Apparently they all carry the same generic ones that are MUCH smaller (count the # of fins) OR they are too bulky in size (too fat and square) in that they do not fit with the other components around on the PCB. Ideally, I would like to find more with the same size foot print and extend longer.

BQ
__________________
Yellow People for a Yellow World
Vote for Super_BQ, the Asian Alternative
  Reply With Quote
Old 30th November 2003, 03:35 AM   #6
diyAudio Member
 
Join Date: Jan 2002
Location: New York City
The problem with solid state sockets and other types of terminal connectors/blocks is that theyare not made of tin plated copper. Most are brass tin plate or nickel plate. Many items in catalogs do not even tell you what the base metal is. Your better of soldering.
It would be nice to have qualtiy sockets like tube guys can get.
__________________
Paul
  Reply With Quote
Old 30th November 2003, 09:50 AM   #7
diyAudio Member
 
Super_BQ's Avatar
 
Join Date: Sep 2001
Location: New Zealand / Canada
Send a message via ICQ to Super_BQ Send a message via Yahoo to Super_BQ
Default Base Metal - Quality in Sound

gnomus,

The .pdf link shows that these socket are made of tin-plated brass.

I don't clearly understand if there's an audible difference between tin-plated copper vs tin-plated brass? I mean it's only the tin plating that the transistor pins have contact to?

Eitherway, I can't seem to hear the difference when I had the transistors directly soldered vs. using these sockets. I would think a different brand of transistor would have a bigger influence in sound quality over what metal is used in the sockets?

BQ
__________________
Yellow People for a Yellow World
Vote for Super_BQ, the Asian Alternative
  Reply With Quote
Old 30th November 2003, 09:13 PM   #8
diyAudio Member
 
Join Date: Jan 2002
Location: New York City
Just prefer copper. Better conductor. Not even looking for oxygen free copper. Very little difference between that and regular copper.
__________________
Paul
  Reply With Quote
Old 30th November 2003, 09:46 PM   #9
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Oxidation is a problem long term. Gold against Gold is the
preferred long term solution. For short term testing, anything
will usually work.
  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
Means of attaching removable baffle to cabinet? cyberspyder Multi-Way 4 4th March 2008 03:30 AM
Removable sound Insulation mbutzkies Multi-Way 4 3rd December 2005 03:40 PM
Removable back box. How to seal? pixpop Multi-Way 7 7th February 2005 09:48 PM
rewiring an sme 3009 removable headshell sq225917 Analogue Source 0 23rd July 2004 09:34 AM
questions on grill and removable back mFinalHeaven Multi-Way 6 1st October 2002 04:27 AM


New To Site? Need Help?

All times are GMT. The time now is 04:22 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