DIY D1 I/V STAGE - Page 10 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 10th June 2012, 01:21 PM   #91
jambul is offline jambul  Belgium
diyAudio Member
 
Join Date: Mar 2011
always humble, daeng ;-)
  Reply With Quote
Old 10th June 2012, 01:54 PM   #92
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Quote:
Originally Posted by crt View Post
All thank's should go to Salas as a designer
i'm just a layout maker

I see it at SSLV thread
I hope you can get rid of those
D-1 already sound wonderfull with stock supply ( i had try it with 7815/7915 with Zener alike in "real D-1")
Layout is very important, I knew when I did the Simplistic NJFET RIAA.

Yes I fixed was a mosfet

Now I will see the football match Italy vs Spain but surely today or tonight I will hear the D1 with your layout & Salas design regs.

Last edited by merlin el mago; 10th June 2012 at 01:56 PM.
  Reply With Quote
Old 10th June 2012, 06:50 PM   #93
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
crt D1 is sounding very very good with Salas SSLV1.1 BiB
  Reply With Quote
Old 11th June 2012, 01:54 PM   #94
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
crt your D1 when playing music sounds like when playing vinyl so like something fried? I ask because I want o know if the filter is OK or how can be modified to suppres this kind of noise?
  Reply With Quote
Old 12th June 2012, 02:49 AM   #95
crt is offline crt  Indonesia
diyAudio Member
 
crt's Avatar
 
Join Date: Apr 2007
Quote:
Originally Posted by jambul View Post
always humble, daeng ;-)


Quote:
Originally Posted by merlin el mago View Post
crt your D1 when playing music sounds like when playing vinyl so like something fried? I ask because I want o know if the filter is OK or how can be modified to suppres this kind of noise?
I did not get what do you mean ?

I use "original" value component of D-1
Playing normal without issues
maybe just I-in a little sliding when first time and settle after few minutes
  Reply With Quote
Old 12th June 2012, 10:50 AM   #96
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
I use "original" value components also
  Reply With Quote
Old 14th October 2012, 03:07 PM   #97
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Quote:
Originally Posted by Zen Mod View Post
obviously yes ;

I told you - all voltages are just approx , counting roughly that Ugs of mosfet is 4V

that 0V point is what is important/needs setting
Can I increase the +-30V power supply until get 4V of Ugs?
  Reply With Quote
Old 19th November 2012, 01:13 PM   #98
diyAudio Member
 
Join Date: Apr 2004
Location: Hanoi
Send a message via AIM to quantran Send a message via MSN to quantran Send a message via Yahoo to quantran
Hi

I am using lm317 and lm337 to supply D1 iv stage. I am now thinking 60v ct transformer gives too high voltage after the retifier, around 44vdc. I think changing to 48v ct is better as i think big voltage drop on lm317 and 337 is not a good thing, too much heat. Also some very good amp design use fairly low supplier voltage. I also have 1000uf of capacitance after the regulator chips but i think that's too much.

Can any one advise on improving this lm317 and lm337 power supply?
__________________
Quan Tran
  Reply With Quote
Old 19th November 2012, 02:34 PM   #99
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
I use Salas BiB low voltage shunt regulator

http://www.diyaudio.com/forums/power...airytales.html

GB link

GB Thread for Salas SSLV1.1 BiB shunt reg
  Reply With Quote
Old 20th November 2012, 10:36 AM   #100
diyAudio Member
 
Join Date: Apr 2004
Location: Hanoi
Send a message via AIM to quantran Send a message via MSN to quantran Send a message via Yahoo to quantran
Thanks, I heard about Salas's regulator design but for now it seems to be quite a lot of effort to get the board and all the parts.

I am still wondering if I should lower the AC voltage with the existing LM317 and 337 design. 44v after the rectifier seems very high as LM313/337 only need about 33v input to give 30v output.

Any one know why Nelson used zeners with 78xx/79xx regulator. Clearly the voltage between input and ground pin of the the regulator is kept reasonably low. Any other performance related reason?
__________________
Quan Tran
  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
DIY D1 I/V Stage from Pass Dac PCBs for sale promitheus Swap Meet 102 25th February 2011 09:03 PM


New To Site? Need Help?

All times are GMT. The time now is 12:03 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