SSLV1.1 builds & fairy tales - Page 123 - 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 7th June 2012, 10:26 AM   #1221
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Quote:
Originally Posted by samoloko View Post
In BIB guide Is said that MOSFET has low Zo but BJT Is flat Zo
for a flat Zo at wide bandwidth what would you prefer BJT or FET
As you said if your priority is flat Zo & your Vout target is 5V or less take BJT.
  Reply With Quote
Old 7th June 2012, 01:00 PM   #1222
diyAudio Member
 
Join Date: Jun 2006
look at simulation last page In BIB - there Is not much difference between MOSFET and BJT regarding flat Zo
that Is why I ask If there are people with analyzer to take a noise vs freq curve within 1 Hz to greater than 100 KHz
  Reply With Quote
Old 7th June 2012, 03:52 PM   #1223
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Salas I forgot to tell you that the NP D1 I/V only sounded with voice without presence or deep with the BiB and when I increased the volume I heard a little of hum, whit LM317 + LM337 sounded good no hum, any idea what happens? I tried 10uF MKT & 220uF lytic as Vref also zobel 10uF MKT+1R & zobel with 47uF lytic & without R?
Attached Images
File Type: jpg DSC00051.jpg (410.9 KB, 158 views)
  Reply With Quote
Old 7th June 2012, 04:37 PM   #1224
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Don't know, it can be the wide PSU bandwidth not helping the particular circuit. Any PSU is in the total current loop. Use whatever helps better a specific circuit. I don't know the analysis of the particular one to speculate more, not familiar with it. Hum beyond ground loops or ripple is also a sign of instability many times. Its either you can fully scope it and measure it and compensate it to play great with this reg or just skip it if it demands beyond simple experiments with parts you feel confident to perform. Or you can persist on trial & error.
  Reply With Quote
Old 7th June 2012, 05:00 PM   #1225
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
I'm really surprised is the first time that your regulator don't perform well
  Reply With Quote
Old 7th June 2012, 05:16 PM   #1226
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
As I said its how you interface something with what, and to do it well in odd cases you need engineering data. That's life, no worries.
  Reply With Quote
Old 7th June 2012, 05:29 PM   #1227
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
I'm worried because isn't for me is for a friend who a spent a lot of money buying two R-Core, the pcbs, the components, the heatsinks, my work not because is my friend so it's free.

Salas a capacitance multiplier from Elliot Sound (attached pic) can be a good idea? the pic is for +-20Vout & I need +-15Vout Elliot said can be reach reducing 12K resistor.

P.S. thanks for help.
  Reply With Quote
Old 7th June 2012, 05:43 PM   #1228
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
We are not allowed by Elliot to host esp schematics or encouraging copying them without permission, sorry.
  Reply With Quote
Old 7th June 2012, 05:45 PM   #1229
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Find another and we will discuss it. That schematic has to go.
  Reply With Quote
Old 7th June 2012, 05:47 PM   #1230
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
I'm sorry, I understand you delete the pic.

You don't have any other capacitance multiplier schematic?
  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
GB Thread for Salas SSLV1.1 BiB shunt reg Tea-Bag Group Buys 1469 16th August 2014 01:34 PM
WTB : Salas SSLV1.1 BiB shunt CaNNA3IS Swap Meet 1 24th November 2013 09:43 AM
FS : 2 x Salas SSLV1.1 BiB PCB + 6 x IRF MiniKits korben69 Swap Meet 6 2nd July 2013 09:32 AM
Some VX.2 Builds CSS/XBL CSS 0 11th April 2013 05:34 PM
so who here builds amps amp builder jb Tubes / Valves 29 15th July 2005 08:23 PM


New To Site? Need Help?

All times are GMT. The time now is 01:18 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