Found a power transformer, what to do with it? - 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
Reply
 
Thread Tools Search this Thread
Old 5th December 2006, 03:27 PM   #1
diyAudio Member
 
Join Date: Feb 2006
Location: you tell me
Default Found a power transformer, what to do with it?

OK, first of all, I'll admit right now that this is kind of a backward way of doing things. Usually you set your eyes on a tube you want to play with before designing/searching a design that you like. Well, I just happened to find a power transformer but I've no idea what I could do with it. The secondary is rated 120V/0.6A (no CT). However, since the primary winding is rated for 220V and my mains is 230V, I get a bit more voltage from the secondary (about 136V no-load). I also have some other stuff lying around, like some tube sockets etc. I did a few simulations on PSUD, and I could build a nice 150-160V B+ supply out of this transformer. OK great! But what to power with it? Anything goes; preamps, headphone amps, power amps. Suggestions?
  Reply With Quote
Old 5th December 2006, 04:01 PM   #2
diyAudio Member
 
Tom Bavis's Avatar
 
Join Date: Jun 2002
Location: Macedon NY
A number of low- voltage tubes can be used - unlikely you'll need much of the 600 mA capacity. One more possibility - you could get about 160 mA at 300V with a doubler. Plenty for a stereo SE amp, or mono push-pull.
  Reply With Quote
Old 5th December 2006, 11:55 PM   #3
diyAudio Member
 
Join Date: Apr 2004
Location: Monroe Township, NJ
Blacklight,

Tom Bavis give a GOOD hint in mentioning a voltage doubler. Your trafo will supply the B+ needs of an "El Cheapo". "El Cheapo" is an "integrated" amp that reaches full power when driven by a CDP.
__________________
Eli D.
  Reply With Quote
Old 6th December 2006, 12:54 AM   #4
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Have a look at SY's Heretical Line Stage. it's easy to build and a great performer.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 6th December 2006, 12:57 AM   #5
Sherman is offline Sherman  United States
diyAudio Member
 
Join Date: Feb 2004
Location: Chicago area
How about an Aikido using 6922 valves? Should be pretty happy at the B+ your trafo can provide.

Or maybe a headphone amp?
__________________
--Sherman
  Reply With Quote
Old 6th December 2006, 01:03 AM   #6
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
choke loaded 12B4 ...............extensive CRCRC filter
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 6th December 2006, 01:15 AM   #7
arnoldc is offline arnoldc  Philippines
diyAudio Member
 
Join Date: Apr 2003
Location: Makati
Send a message via Yahoo to arnoldc
WE417A / 5842 transformer-coupled headphone amplifier
  Reply With Quote
Old 6th December 2006, 01:42 AM   #8
paulb is offline paulb  Canada
diyAudio Member
 
Join Date: Jun 2001
Location: Calgary
Default Re: Found a power transformer, what to do with it?

Quote:
Originally posted by blacklight
OK, first of all, I'll admit right now that this is kind of a backward way of doing things.
Not according to my way of thinking...
  Reply With Quote
Old 6th December 2006, 07:25 AM   #9
diyAudio Member
 
Join Date: Feb 2006
Location: you tell me
Ha! paulb: point taken. Wow, I never thought I'd have this many replies. Thanks for all the suggestions. I did concider that voltage doubler, and while it does seem attractive, I think I'll have to do it another time (I may be able to get my hands on another of these trafos). Looks like I'll be building an Aikido Low impedance headphone amp, since that's something I need. Thanks all, you've been most helpful, again.
  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
Where can found R-core Transformer? Cephas Parts 37 1st December 2011 12:18 AM
Found An Old Transformer, Now What??? xxxkahunaxxx Tubes / Valves 9 16th December 2008 12:12 AM
Found some nice Aleph power supply chokes today Panelhead Pass Labs 0 3rd April 2003 01:10 AM
toroid Transformer as power Transformer for tube tone Tubes / Valves 7 11th February 2003 09:57 AM


New To Site? Need Help?

All times are GMT. The time now is 12:21 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