Simplistic Mosfet HV Shunt Regs - Page 387 - 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 6th April 2013, 10:20 AM   #3861
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Long >=6" 150mm
Short <=1" 25mm
__________________
regards Andrew T.
  Reply With Quote
Old 6th April 2013, 11:35 AM   #3862
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Quote:
Originally Posted by AndrewT View Post
Long distances defeat the main advantage of regulated supplies, namely low output impedance.
Long distances must have high impedance.

To get the benefit of regulated supplies the regulator should be right next to the client circuit.

The higher the current slew rates the worse this problem becomes.
At very high current slew rates, using regulators on long distance leadouts is a waste of resources.
Remote sensing does not solve long distance powering.
Completely agree is not sense to make a very good regulator and place it long distance from load.
  Reply With Quote
Old 6th April 2013, 12:06 PM   #3863
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
Guys, I don't need to be convinced of the technical benefits, because to me it makes sense. If you look back I was the one pushing for sense/force wires in the old days when we extended the low impedance of v1.0 (low voltage) by adding the extra bjt source follower. I was just wondering if anyone could hear the difference, that's all.

Edit: basically I'd just like to know for myself, out of simple curiousity. Anecdotal evidence would be enough for me.
  Reply With Quote
Old 6th April 2013, 04:09 PM   #3864
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Kazuo san got rather impressed of what 4 wires could do for his burgeoning Reflektor experiments although he was not convinced due to short distance and was using 2 wires at start. I could feel it was worthwhile in most applications too. Both in low V and high V. 4 wires connection can be more prone to EMI is one danger and if without a scope some perceived harshness is tell tale. It can almost always be remedied if it happens by proper wiring dressing and/or some extra sense loop decoupling at the reg. People can subjectively check 4 VS 2 wire on their own application by shorting F+ to S+ and F0 to S0 locally at the reg connector with short jumpers and do A to B critical listening so to respond back to your anecdotal statistical query. No use of the soldering iron is needed if 4 wire mode is already there. The local shorting will effectively make it into 2 wire for the curious to evaluate.
  Reply With Quote
Old 7th April 2013, 01:42 AM   #3865
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
Thanks Salas!
  Reply With Quote
Old 13th April 2013, 11:04 PM   #3866
JBLman is offline JBLman  United States
diyAudio Member
 
Join Date: Apr 2010
Hey guy's I'm new to the sshv2 I was wondering when setting it up are you guys using the ma needed in the formula to calculate the resistor value? Here's what I mean, I need 19ma w/ the drop off of 20ma that equals 39ma. So, 310v/.39ma = 793 ohm so a 800 ohm resistor or is it 310/.19 = 1631 a 1.6k ohm resistor.
Could someone let me know, Thanks!
  Reply With Quote
Old 14th April 2013, 12:02 AM   #3867
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Its 310/0.19 since you need simulate just the load consumption not to drain the whole CCS. A 1K5 10W standard part or 1K6 should do.
  Reply With Quote
Old 14th April 2013, 12:39 AM   #3868
JBLman is offline JBLman  United States
diyAudio Member
 
Join Date: Apr 2010
Thanks! will do!
  Reply With Quote
Old 14th April 2013, 11:27 PM   #3869
JBLman is offline JBLman  United States
diyAudio Member
 
Join Date: Apr 2010
So now that I have that, I'll be adjusting the trimmer to 390mv correct? The .19+.20 for reg. drop.
  Reply With Quote
Old 15th April 2013, 12:47 AM   #3870
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Yes.
  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 06:21 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