Bypass your adjustable regulators ADJ pin to ground to hear another veil drop... - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

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
Thread Tools Search this Thread
Old 1st August 2002, 12:18 PM   #1
diyAudio Member
Join Date: Apr 2002
Default Bypass your adjustable regulators ADJ pin to ground to hear another veil drop...

Hi all,

In my CD player (Rotel 955, 16 bit, zero oversampling, passive IV conversion, Guido tent clock, every chip with its own regulator, etc) I have just completed an exercise in bypassing all the LM317's/LT1085s ADJ pins in the power supplies with a 100uF tantalum capacitor (thats probably overkill, recommended is 10uF IIRC). I also placed a 470nF/10nF ceramic cap combo on teh inputs/outputs of each regulator. This is in addition to the 1000uf or so that already exists at the in/output of each regulator.

The effect is to lower the noise floor and more details (always the same heh?) are now available, more transient information, more emotion and it appears that the music flows more easily and is more live/emotive.
Sorry, all mushy descriptions, but a worthwhile (not night and day) tweak.

  Reply With Quote
Old 1st August 2002, 04:48 PM   #2
paulb is offline paulb  Canada
diyAudio Member
Join Date: Jun 2001
Location: Calgary
Check the LM317 app note, you may also want to add protection diodes with those big caps you've added.
  Reply With Quote


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
+/-15V power to a TI PGA2310. 15V regulators sufficient or do I need adjustable?? nick_g_evans Parts 2 16th July 2008 11:50 AM
why mute transitors veil the sound ? plep Digital Source 17 2nd February 2008 05:30 AM
Parallel LM3886, input ground, power ground, safety resistor and oscillations. markiemrboo Chip Amps 5 9th August 2007 03:50 PM
Voltage drop of various regulators in dc regulated power supply for preamp duderduderini Tubes / Valves 0 26th February 2007 11:48 AM
does connecting mains ground with circuit ground create a ground loop? jarthel Everything Else 0 25th June 2003 12:55 PM

New To Site? Need Help?

All times are GMT. The time now is 10:16 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2