Suggestions on regulating -70v Suggestions on regulating -70v - Page 2 - diyAudio
Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Suggestions on regulating -70v
Suggestions on regulating -70v
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 March 2013, 02:03 PM   #11
MelB is offline MelB  Canada
diyAudio Member
 
Join Date: Feb 2005
Location: BC Canada
You will be dissipating a LOT of energy to get 5v out of that. I would use a winding that is closer to your intended output voltage.
  Reply With Quote
Old 5th March 2013, 04:10 PM   #12
impsick is offline impsick  United States
diyAudio Member
 
impsick's Avatar
 
Join Date: Dec 2006
Location: Huntington Beach, Ca
Quote:
Originally Posted by MelB View Post
You will be dissipating a LOT of energy to get 5v out of that. I would use a winding that is closer to your intended output voltage.
well my plan was to use a voltage quadrupler to get the 70v.
__________________
"Nothing happens for a reason. There are just reasons why things happen." Quote me on that. http://stores.ebay.com/AudioGrade?_rdc=1

Last edited by impsick; 5th March 2013 at 04:26 PM.
  Reply With Quote
Old 5th March 2013, 04:37 PM   #13
impsick is offline impsick  United States
diyAudio Member
 
impsick's Avatar
 
Join Date: Dec 2006
Location: Huntington Beach, Ca
Here this is what I had in mind... Would this work or am I in need of exclusive windings? thanks.
Click the image to open in full size.
__________________
"Nothing happens for a reason. There are just reasons why things happen." Quote me on that. http://stores.ebay.com/AudioGrade?_rdc=1
  Reply With Quote
Old 6th March 2013, 06:53 AM   #14
impsick is offline impsick  United States
diyAudio Member
 
impsick's Avatar
 
Join Date: Dec 2006
Location: Huntington Beach, Ca
well I tested the schematic above, it works, but now the 70v rails are uneven.
any suggestions on how to compensate? Could this just be a case of tweaking resister values? Or any design techniques anyone can share? thanks in advance.
__________________
"Nothing happens for a reason. There are just reasons why things happen." Quote me on that. http://stores.ebay.com/AudioGrade?_rdc=1
  Reply With Quote
Old 6th March 2013, 02:02 PM   #15
Robert Kesh is offline Robert Kesh  Wallis & Futuna
diyAudio Member
 
Robert Kesh's Avatar
 
Join Date: Oct 2012
Quote:
Originally Posted by impsick View Post
Could this just be a case of tweaking resister values?
Yes. the reg's ref voltage is usually listed as 1.2 to 1.3V. So potentially up to 8% difference between any 2 units. So tweak resistors to compensate.
  Reply With Quote
Old 6th March 2013, 03:01 PM   #16
jackinnj is offline jackinnj  United States
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Suggestions on regulating -70v
You can use the "2 Transistor Regulator" from Jones "Valve Amplifiers" -- the output voltage will be ~2x the value of the reference. It's good to around 40-50mA and very simple to implement.

Click the image to open in full size.

For more current use a Darlington transistor as the pass element.
  Reply With Quote
Old 6th March 2013, 07:55 PM   #17
impsick is offline impsick  United States
diyAudio Member
 
impsick's Avatar
 
Join Date: Dec 2006
Location: Huntington Beach, Ca
Thank you all
__________________
"Nothing happens for a reason. There are just reasons why things happen." Quote me on that. http://stores.ebay.com/AudioGrade?_rdc=1
  Reply With Quote

Reply


Suggestions on regulating -70vHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ryan regulators not regulating? bobschneider Solid State 0 15th August 2007 10:14 PM
Self regulating Class A Kees Solid State 50 14th October 2004 08:41 PM
LM3x7 HV regulating. w00t Parts 3 29th February 2004 09:42 PM
7815 not regulating. JoeBob Solid State 16 8th September 2003 12:51 PM


New To Site? Need Help?

All times are GMT. The time now is 04:46 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki