Simplistic Mosfet HV Shunt Regs - Page 170 - 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 29th March 2011, 01:08 PM   #1691
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Quote:
Originally Posted by albertli View Post
Sorry, the attachment didn't go with it.
Basically I follow the new version with some changes. R1-56R, R3/56K and R5-100k. I go with CLC and split into 2 RC 180v to the regs. I'm aiming at 150v 9 mA.

Albert
They have used it before on #26 in its thread with good feedback commentary. Make R3 33K 5W for 180V input. Measure 3x1.9Vf Leds @ 5mA so the 56R will give around 40mA for average Vgs. At this input voltage skip the big protection Zener, use only the small ones at the gates if any. Good luck and let us know.
  Reply With Quote
Old 29th March 2011, 02:06 PM   #1692
diyAudio Member
 
dvb projekt's Avatar
 
Join Date: Feb 2009
Location: Willich, Germany
Blog Entries: 37
Send a message via Skype™ to dvb projekt
Hi Salas,

could you short explain whats the benefit of the lower R3 value?
__________________
Reference TDA1541A DAC project PCBs / Tube-I-zator PCB / SSHV-Shunt PCB
Stock status in my Blog
  Reply With Quote
Old 29th March 2011, 02:51 PM   #1693
diyAudio Member
 
albertli's Avatar
 
Join Date: Nov 2004
Location: Vancouver
Quote:
Originally Posted by Salas View Post
They have used it before on #26 in its thread with good feedback commentary. Make R3 33K 5W for 180V input. Measure 3x1.9Vf Leds @ 5mA so the 56R will give around 40mA for average Vgs. At this input voltage skip the big protection Zener, use only the small ones at the gates if any. Good luck and let us know.
Salas,
Thanks for your response.
What if I use a isolation transformer then I might have 170v input, the R3 33K stays the same? Use small zeners at the gates, I thought you suggest the D1 1n5383B can be smaller and the D5,6,7and 8 remain the same 1n4742a. Can I use same 90v for D1 or ??
Albert
  Reply With Quote
Old 29th March 2011, 03:03 PM   #1694
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
33K stays the same with 170V DCin. Small 0.5W 10V-12V types Zeners will all do for gates protection. IRF9610 is a 200V part so you can be secure without D1 even with your voltages.
  Reply With Quote
Old 30th March 2011, 01:52 AM   #1695
diyAudio Member
 
albertli's Avatar
 
Join Date: Nov 2004
Location: Vancouver
Quote:
Originally Posted by Salas View Post
33K stays the same with 170V DCin. Small 0.5W 10V-12V types Zeners will all do for gates protection. IRF9610 is a 200V part so you can be secure without D1 even with your voltages.
Salas,
Thanks.
So I only need 4 12v for the purpose.
Will let you know but might take a while, for I just start ordering parts.
Albert
  Reply With Quote
Old 30th March 2011, 02:07 AM   #1696
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
OK.
  Reply With Quote
Old 30th March 2011, 05:06 AM   #1697
diyAudio Member
 
dvb projekt's Avatar
 
Join Date: Feb 2009
Location: Willich, Germany
Blog Entries: 37
Send a message via Skype™ to dvb projekt
Quote:
Originally Posted by dvb-projekt View Post
Hi Salas,

could you short explain whats the benefit of the lower R3 value?
bump
__________________
Reference TDA1541A DAC project PCBs / Tube-I-zator PCB / SSHV-Shunt PCB
Stock status in my Blog
  Reply With Quote
Old 30th March 2011, 05:47 AM   #1698
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
That value gets to be adjusted for feeding the Leds healthier like in average 200-300V SSHV if some builds are lower or higher DCin.
  Reply With Quote
Old 31st March 2011, 07:13 AM   #1699
diyAudio Member
 
Join Date: Jun 2009
Location: Athens
Hi,

I 'm getting ready to move to simpler simplistic version of Salas HV shunt.
300Vin, 260Vout. If i want to aim for 60mA, is there any other change except lowering R1?
Attached Images
File Type: gif salasHV_300.gif (7.4 KB, 266 views)
  Reply With Quote
Old 31st March 2011, 07:14 AM   #1700
diyAudio Member
 
Join Date: Sep 2009
Location: Vietnam
Blog Entries: 2
Send a message via Yahoo to quanghao Send a message via Skype™ to quanghao
Quote:
Originally Posted by manamanam View Post
Hi,

I 'm getting ready to move to simpler simplistic version of Salas HV shunt.
300Vin, 260Vout. If i want to aim for 60mA, is there any other change except lowering R1?
R1 =33R, you can get 60ma!
__________________
Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
  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
Regs - Shunt vs Series richie00boy Solid State 42 14th March 2013 06:45 PM


New To Site? Need Help?

All times are GMT. The time now is 01:27 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