Voltage doubler? - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

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 10th February 2013, 08:21 PM   #1
diyAudio Member
 
Join Date: Dec 2010
Location: Amesbury, MA
Default Voltage doubler?

I am not sure but this looks like a voltage doubler? It is for a tube amp and I think that it probably can be upgraded or redesigned maybe, most voltage doublers I have seen have about double the components. If someone could please explain what is going on here it would be much appreciated.
Attached Images
File Type: jpg power supply.JPG (65.7 KB, 147 views)
  Reply With Quote
Old 10th February 2013, 08:35 PM   #2
Ketje is offline Ketje  Belgium
diyAudio Member
 
Join Date: Dec 2012
Location: Flanders
It's rather simple realy.There are two halfwave rectifiers.The positive one goes though D101 charging C101 and the negative half by D102 to charge C103 with it's lower end at gndlevel (just outside the picture).Since one is on top of the other you get dubble voltage.
Mona
  Reply With Quote
Old 10th February 2013, 08:44 PM   #3
diyAudio Member
 
Join Date: Dec 2010
Location: Amesbury, MA
Why would this be used instead of say a bridge rectifier? I usually see a full wave bridge rectifier on most designs.
  Reply With Quote
Old 10th February 2013, 08:58 PM   #4
Ketje is offline Ketje  Belgium
diyAudio Member
 
Join Date: Dec 2012
Location: Flanders
Economical reasons I suppose.If you put a extra idental winding on the transfo with two diodes to C101 and C103 it becomes a bridgerectifier.In stead off a 60Hz ripple it is now a 120Hz smaller one.Normaly that's better but if it isn't nessesairy why make the extra cost.
Mona
  Reply With Quote
Old 10th February 2013, 08:58 PM   #5
diyAudio Member
 
Join Date: May 2010
Location: Hawkes Bay
Thoughts that come to mind;
1. Bridge rectifier has a theoretical output voltage of 1.41x - not 2x
2. Don't have to throw away voltage for stages downstream through resistors

Cheers
JimG
  Reply With Quote
Old 10th February 2013, 09:10 PM   #6
diyAudio Member
 
Join Date: May 2010
Location: Hawkes Bay
3. Only need 350v smoothing caps.
  Reply With Quote
Old 11th February 2013, 08:44 AM   #7
diyAudio Member
 
payloadde's Avatar
 
Join Date: Mar 2008
Quote:
Originally Posted by famousmockingbird View Post
Why would this be used instead of say a bridge rectifier? I usually see a full wave bridge rectifier on most designs.
can be used to get symmetric -250v / -0 / +250v from a single transformer winding
or two different voltages like +250v / +500v from a single transformer winding
depending where you put "ground"

- is sometimes mis-labeled Greinacher Circuit (should be named Delon Circuit though)

Jochen's High Voltage Page : Basic multiplier circuits
Voltage doubler - Wikipedia, the free encyclopedia
__________________
Judge: This court appreciates that you invented physics, Mr.Newton, but unfortunately you can't have a patent on it.
  Reply With Quote
Old 11th February 2013, 12:26 PM   #8
diyAudio Member
 
Join Date: Dec 2010
Location: Amesbury, MA
Quote:
Originally Posted by payloadde View Post
can be used to get symmetric -250v / -0 / +250v from a single transformer winding
or two different voltages like +250v / +500v from a single transformer winding
depending where you put "ground"

- is sometimes mis-labeled Greinacher Circuit (should be named Delon Circuit though)

Jochen's High Voltage Page : Basic multiplier circuits
Voltage doubler - Wikipedia, the free encyclopedia


Thank you so much for this explanation!!!! I was thinking of a Greinacher Circuit in my head which is different. It is indeed a Delon circuit!!!!!
  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
Voltage Doubler ????? Dagwood Power Supplies 4 6th November 2011 02:30 PM
Transformer for voltage doubler? markusA Power Supplies 10 13th February 2011 11:40 AM
Need help with voltage doubler Lingwendil Power Supplies 6 22nd April 2009 12:15 AM
Voltage Doubler jwatts Tubes / Valves 3 2nd January 2009 12:13 AM
Voltage doubler Baard Solid State 28 17th January 2005 04:46 AM


New To Site? Need Help?

All times are GMT. The time now is 04:39 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