Salas hotrodded blue DCB1 build - Page 219 - diyAudio
Go Back   Home > Forums > Source & Line > Analog Line Level

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, 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
Reply
 
Thread Tools Search this Thread
Old 2nd September 2012, 09:36 AM   #2181
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
I don't have the knowledge to devise the tests required to prove the PSU is stable with input artifacts applied.
__________________
regards Andrew T.
  Reply With Quote
Old 4th September 2012, 12:02 AM   #2182
jeffx is offline jeffx  United States
diyAudio Member
 
Join Date: Jun 2006
I am finishing my DCB1 build, and since I use will use it with several different amps(one being Aleph 5 monos), I am building it with caps on the output. In post# 295 Salas says to put 1M resisters after the caps so the caps will not be floating. Does this mean to run the caps to the ouput+ and then run the resistors from here to the output-? This is how it appears in the Marra's build photo in post# 342.
  Reply With Quote
Old 4th September 2012, 05:52 AM   #2183
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Like this
Attached Images
File Type: jpg cap_out.jpg (34.1 KB, 247 views)
  Reply With Quote
Old 5th September 2012, 12:00 PM   #2184
diyAudio Member
 
Join Date: Nov 2009
Location: UK, Manchester
I'm curious which 10k step attenuator to choose for the hot rod DCB1?
-4x24 Ladder Type
-23 step

is there any technical advantage in the Ladder?

Noticed that many built their buffers with LDRs, is there a dramatic improvement over Dale step attenuator?

Last edited by dtses; 5th September 2012 at 12:03 PM.
  Reply With Quote
Old 5th September 2012, 12:13 PM   #2185
diyAudio Member
 
Join Date: Jan 2006
Location: Toronto
The ladder is simpler and much cheaper. I wanted the purest possible sound (fewest possible components in the signal path), so I went with the LDR (buildanamp.com). I relied on the advice of the DIYaudio members who have compared both and can hear a difference.
__________________
Michael
  Reply With Quote
Old 5th September 2012, 12:25 PM   #2186
diyAudio Member
 
Join Date: Nov 2009
Location: UK, Manchester
cheers Mike,

thanks for the link! I might consider LDR as well.

As I've understood the 2nd one I've listed is not of a ladder type, isn't it?
  Reply With Quote
Old 5th September 2012, 12:36 PM   #2187
diyAudio Member
 
KatieandDad's Avatar
 
Join Date: Nov 2011
Location: UK
If I understand correctly, the Ladder style attenuator is so called because each step uses two resistors, maintaining the input impedance to the same value at every step.
  Reply With Quote
Old 5th September 2012, 12:39 PM   #2188
diyAudio Member
 
schubert's Avatar
 
Join Date: Sep 2008
Location: Pennsylvania, USA
Quote:
Originally Posted by dtses View Post
cheers Mike,

thanks for the link! I might consider LDR as well.

As I've understood the 2nd one I've listed is not of a ladder type, isn't it?
Right, the second one is not a ladder, as it doesn't have enough resistors. It's a series type which works just like a conventional pot, only in increments.
  Reply With Quote
Old 5th September 2012, 01:25 PM   #2189
diyAudio Member
 
Join Date: Jan 2006
Location: Toronto
Quote:
Originally Posted by KatieandDad View Post
If I understand correctly, the Ladder style attenuator is so called because each step uses two resistors, maintaining the input impedance to the same value at every step.
Also there is a max of 2 resistors in the circuit at all times. If you do decide to go ladder and remote control is of interest, there are several board-based designs around. Most have more than 23 steps, which allows finer adjustment. A 23 step usually allows for 3dB adjustments where a ladder array can get you to 0.5dB.
__________________
Michael
  Reply With Quote
Old 5th September 2012, 01:59 PM   #2190
sorue is offline sorue  Singapore
diyAudio Member
 
Join Date: Nov 2011
Quote:
Originally Posted by dtses View Post
I'm curious which 10k step attenuator to choose for the hot rod DCB1?
-4x24 Ladder Type
-23 step

is there any technical advantage in the Ladder?

Noticed that many built their buffers with LDRs, is there a dramatic improvement over Dale step attenuator?
I didn't have any experience with those 2 attenuators you linked. I tried the other popular ebay dact clone. Then i decided to upgrade to the TKD 2511 (bought from percyaudio). The TKD is more expensive but it is MUCH better than those ebay attenuators and well worth the price. I think the DCB1 deserves a proper attenuator.
  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
dcb1 buffer with shunt reg. merlin2069er Swap Meet 0 3rd August 2010 05:25 PM
F2 and DCB1 parts selection - please advice! DQ Pass Labs 6 25th November 2009 03:20 PM
Y B Blue - how blue LED improves the CD playback Peter Daniel Digital Source 176 25th September 2003 07:40 AM


New To Site? Need Help?

All times are GMT. The time now is 11:46 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