Discrete low current HV supply - 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 25th November 2010, 11:33 AM   #1
diyAudio Member
 
Sch3mat1c's Avatar
 
Join Date: Jan 2003
Location: Milwaukee, WI
Send a message via ICQ to Sch3mat1c Send a message via AIM to Sch3mat1c
Default Discrete low current HV supply

Built this, this evening...

Click the image to open in full size.

Click the image to open in full size.

Main switch is a 2N4401. Draws about a watt at 15V, making 60-120V at up to ~1.5mA, with pitiful efficiency (but it's only a watt, so who cares). Regulation is extremely good, thanks to the TL431's high gain.

I built it for avalanche pulse generator experiments, but I'm posting it here as it would be excellent for a small tube preamplifier for battery, automotive or "wall-wart" operation.

Tim
__________________
Seven Transistor Labs
Projects and Resources
  Reply With Quote
Old 25th November 2010, 04:51 PM   #2
luka is offline luka  Slovenia
diyAudio Member
 
luka's Avatar
 
Join Date: Sep 2005
Location: in Slovenia :)
Send a message via Skype™ to luka
cool!
__________________
home page @ http://www.classdaudio.tk/ @ 24/7 all year long
I FEEL SLOVENIA
  Reply With Quote
Old 27th November 2010, 01:13 AM   #3
diyAudio Member
 
Join Date: Sep 2010
Location: Melbourne
That is a novel construction technique, nice ground plane.
  Reply With Quote
Old 27th November 2010, 02:23 AM   #4
Account disabled at member's request
 
MJL21193's Avatar
 
Join Date: Mar 2007
Dead bug...
  Reply With Quote
Old 27th November 2010, 04:39 AM   #5
diyAudio Member
 
Sch3mat1c's Avatar
 
Join Date: Jan 2003
Location: Milwaukee, WI
Send a message via ICQ to Sch3mat1c Send a message via AIM to Sch3mat1c
As recommended by Jim Williams, so you know it's good :P Not really necessary for such a circuit, but it goes with said pulse generator's styling (where the RF performance *is* needed!).

Tim
__________________
Seven Transistor Labs
Projects and Resources
  Reply With Quote
Old 28th November 2010, 09:44 AM   #6
Elvee is offline Elvee  Belgium
diyAudio Member
 
Elvee's Avatar
 
Join Date: Sep 2006
I often use 2-transistor converters, same sex or complementary to create supplies from a single cell or to light an LED.

The same principle can be used for higher voltages, see extrapolation.
The efficiency is ~ 80%, not very good by today's standards but not catastrophic either.

PS
This type of converter can also be used for applications like this one: When you need +/- 15VDC and have only one pole at power levels up to ~500mW (higher with Zetex superbeta transistors)
Attached Images
File Type: gif ComplCNV.gif (12.9 KB, 75 views)
File Type: gif Nconv.gif (11.2 KB, 72 views)
File Type: gif XtrapolN.gif (37.4 KB, 73 views)

Last edited by Elvee; 28th November 2010 at 09:57 AM.
  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
preamp supply LOW power LOW noise LOW cost drdagor Power Supplies 1 13th September 2010 11:39 PM
HV lab supply hidnplayr Power Supplies 1 17th February 2010 12:25 PM
Is this a practical HV supply? keantoken Power Supplies 16 26th May 2009 11:48 PM
Low-current power supply for linkwitz transform DonoMan Car Audio 8 10th March 2007 07:29 PM
BU208a HV/High Current jackinnj Swap Meet 0 28th October 2002 08:48 AM


New To Site? Need Help?

All times are GMT. The time now is 10:05 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