broskie voltage regulator - 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 14th January 2007, 08:26 PM   #1
diyAudio Member
 
Join Date: Mar 2005
Location: mid wales
Default broskie voltage regulator

http://tubecad.com/2006/11/blog0087.htm

i've been looking at the 12b4 regulator above
i understood i would need to shunt @120% of circuit current
is this so?
i can't find any mention of this on broskies site
my phono stage draws 80mA
i'm thinking this 12b4 will not be enough

dave
  Reply With Quote
Old 14th January 2007, 09:48 PM   #2
rdf is offline rdf  Canada
diyAudio Member
 
rdf's Avatar
 
Join Date: Jun 2004
Location: big smoke
Default Re: broskie voltage regulator

Quote:
Originally posted by dave dove
i understood i would need to shunt @120% of circuit current....
Where did the figure originate? I suspect the 12b4 is required to sink a DC minimum of 120% of the circuit's maximum AC draw, which for most line stages would be miniscule. I'ld also be tempted to investigate returning the cathode through the zener diode stack at an appropriate voltage and running it pseudo fixed-bias.
  Reply With Quote
Old 14th January 2007, 09:50 PM   #3
lndm is offline lndm  Australia
diyAudio Member
 
Join Date: Mar 2006
Location: nsw
You really only need to shunt enough so the shunt device can make up the difference from the amp. Ie, if the amp under working conditions varies its current by, say, 1mA in each direction then the shunt device only needs to draw 1mA plus a little more to be sure it stays within a good area of operation (doesn't bottom out).
  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
RCA voltage regulator astouffer Tubes / Valves 12 14th December 2012 10:33 PM
Broskie regulator oscillates rman Tubes / Valves 11 26th July 2009 04:35 AM
Voltage regulator help audiobahnkid592 Class D 5 12th March 2007 10:01 AM
Voltage Regulator ! jleaman Power Supplies 11 13th May 2005 12:00 AM
So your using a Voltage regulator Shoog Pass Labs 1 29th January 2003 08:04 PM


New To Site? Need Help?

All times are GMT. The time now is 03:01 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