Low Profile Power Transformer Help - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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
Thread Tools Search this Thread
Old 9th March 2007, 05:15 PM   #1
diyAudio Member
dsavitsk's Avatar
Join Date: Jan 2005
Location: Hartford
Default Low Profile Power Transformer Help

I am looking for a 250-0-250 transformer (a little higher or lower voltage is not a problem) at 40mA that is low profile enough to fit inside a chassis with 2.25" of clearance (that's 5.7cm). If it has a 5V secondary that is a great bonus, but it is not essential.

Lundahls are too expensive (and I'm not sure they would fit anyway) -- $120 is the ceiling, and even that is probably too high. Am I stuck with a toroidal? Is there somewhere to get this custom made? I would usually use electra-print, but I think they are too large in this case.
  Reply With Quote
Old 9th March 2007, 06:38 PM   #2
zobsky is offline zobsky  India
diyAudio Member
zobsky's Avatar
Join Date: Mar 2002
Location: Dallas, Tx, USA
Perhaps this toroid (or something similar) would work (about 0.25 " too large)
"Any fool can know. The point is to understand" - Albert Einstein
  Reply With Quote
Old 10th March 2007, 12:35 AM   #3
diyAudio Member
frank754's Avatar
Join Date: Jan 2007
When I have a problem finding it on the normal channels, I usually check Allied as a fallback.
This one may work for you, no 5v taps though. Shouldn't be really big with the lower ratings, and only $21:

  Reply With Quote
Old 10th March 2007, 04:34 AM   #4
diyAudio Member
dsavitsk's Avatar
Join Date: Jan 2005
Location: Hartford
Thanks, but it appears to be slightly too large.
  Reply With Quote
Old 10th March 2007, 08:53 AM   #5
diyAudio Member
Join Date: Mar 2003
Location: Zürich
Hi dsavitsk

Maybe you can work with trafo's wired back to back,

If you can find those low profile trannys cheap, from surplus, it could work out. Off course you will get lots of mass, but hey, you talked about low profile, said nothing aboutthe beed low mass or low area

Nice weekend!

  Reply With Quote
Old 10th March 2007, 11:35 AM   #6
diyAudio Member
stokessd's Avatar
Join Date: Nov 2002
Location: Grantham, NH
I used a toriod kit from Toroid Corp of Maryland for my tube DAC transformer. I wound a 250 volt b+ winding and a hefty filament winding plus +-15 windings for both analog and digital power. It's an 80 va transformer which is 1.7" high and about 3.5" in diameter when finished.


And some info on what I did with the smallest kit:


  Reply With Quote


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
Profile A1200 XL Odd Power Supply amc32 Car Audio 5 26th November 2008 10:44 PM
best cone profile for sub ? ejaouen Subwoofers 12 17th June 2008 04:28 AM
profile A600 2 ch jrod666999 Car Audio 9 18th March 2008 10:26 PM
Low Profile Desktop Power Supplies Tom D Solid State 11 7th August 2003 09:24 PM
toroid Transformer as power Transformer for tube tone Tubes / Valves 7 11th February 2003 08:57 AM

New To Site? Need Help?

All times are GMT. The time now is 08:46 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright ©1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2