little trannies looking for amp - diyAudio
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 22nd January 2008, 10:35 AM   #1
wazabee is offline wazabee  France
diyAudio Member
 
Join Date: Mar 2007
Default little trannies looking for amp

Hi All,

I got a cpl of nice looking little trannies 9/24v 27/72 va (for cheap). And it looks like too much and not enough. To much for sewa/mini-a and not enough for aleph-30. Could you help me with the choice some little nice sounding amp
__________________
l_l_lasabi
  Reply With Quote
Old 23rd January 2008, 01:18 AM   #2
diyAudio Member
 
Join Date: Nov 2006
You might go to Google and do a search on 'trannies' -- I think you will be surprised by the results.
  Reply With Quote
Old 23rd January 2008, 10:51 AM   #3
wazabee is offline wazabee  France
diyAudio Member
 
Join Date: Mar 2007
In fact it's quite different from what you obtain on this forum. Will ask google to correct this bug.

Was thinking about, the use on aleph-30 down sized to one pair of output devices. Any suggestions ?
__________________
l_l_lasabi
  Reply With Quote
Old 23rd January 2008, 11:27 AM   #4
diyAudio Member
 
MEGA_amp's Avatar
 
Join Date: Oct 2003
Location: CT
Quote:
aleph-30 down sized to one pair of output devices
You would then have a Mini-A. The transformers you have are too small for this application.
  Reply With Quote
Old 23rd January 2008, 01:29 PM   #5
wazabee is offline wazabee  France
diyAudio Member
 
Join Date: Mar 2007
mini-a takes 12v/30va, 24v/72va is even more.
__________________
l_l_lasabi
  Reply With Quote
Old 23rd January 2008, 10:11 PM   #6
diyAudio Member
 
MEGA_amp's Avatar
 
Join Date: Oct 2003
Location: CT
For a Mini-A, I would not go lower than 225VA, for Aleph 30 (stock) I wouldn't go lower than 400VA. Have a look HERE , to see how others have done it.
  Reply With Quote
Old 24th January 2008, 01:05 AM   #7
diyAudio Member
 
Join Date: Nov 2006
Wazabee-

How many of these trafos do you have? Are they center-tapped 12v-0-12v?

JJ
  Reply With Quote
Old 24th January 2008, 11:01 AM   #8
wazabee is offline wazabee  France
diyAudio Member
 
Join Date: Mar 2007
jupiterjune:

I have 2 and not center tapped.
__________________
l_l_lasabi
  Reply With Quote
Old 24th January 2008, 02:46 PM   #9
diyAudio Member
 
Join Date: Nov 2006
those are a bit small for a power amp -- I like to use a trafo rated at 4X the required VA.

Might make a nice aleph-P or a jfet BZLS. (Mine uses 30V secondaries, which is plenty).


JJ
  Reply With Quote
Old 24th January 2008, 09:54 PM   #10
diyAudio Member
 
Join Date: Feb 2001
Location: Columbia, SC
In principle, you can build a smaller Mini-A by using lower rails, but the distortion will be somewhat higher.

Grey
  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
Trannies in parallel Dan2 Power Supplies 13 12th September 2011 11:37 PM
Want to trade: 6.2K/4 trannies for 5K/8 trannies mashaffer Swap Meet 1 8th June 2008 06:34 PM
new Trannies Calvin Planars & Exotics 25 10th January 2006 08:39 PM
output trannies flodge Planars & Exotics 4 21st August 2005 06:35 PM
Any feedback on these trannies? gjo Tubes / Valves 0 27th January 2005 09:32 AM


New To Site? Need Help?

All times are GMT. The time now is 02:01 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