Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

line stage attenuation options
line stage attenuation options
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 2nd February 2009, 04:40 PM   #1
marc brown is offline marc brown  United States
diyAudio Member
marc brown's Avatar
Join Date: Sep 2007
Location: Henderson, NV
Default line stage attenuation options

I'm building a B1 buffer with the modification of using an LDR-based attenuator in lieu of a traditional potentiometer. To get the input impedance back up to around 30k, I'd like to insert some quality resistors like Vishay or Caddock and I wanted to get some sort of consensus on what type of resistor is best in that application and which manufacturer might sound best. In this situation are thin film, thick film, wire wound, etc best? What sort of wattage rating do I need? Should these be sinked to deal with the inevitable heat?

thanks in advance,
  Reply With Quote
Old 2nd February 2009, 08:10 PM   #2
hifimaker is offline hifimaker  United States
diyAudio Member
hifimaker's Avatar
Join Date: Oct 2003
Location: San Jose
In my experience, the lowest noise and most neutral resistors are the Vishay/Dale RN55D or RN60D. They are not ROHS compliant, but this is not an issue for DIY'ers. They offer performance way beyond their cost. 1/8 to 1/4 watt is all that's required for RNxxD's in a buffer/preamp attenuator. These resistors have a very underrated power rating. If in doubt, on power rating then go with the 1/4 watt.

Check www.mouser.com for prices.

  Reply With Quote
Old 3rd February 2009, 02:37 PM   #3
marc brown is offline marc brown  United States
diyAudio Member
marc brown's Avatar
Join Date: Sep 2007
Location: Henderson, NV
Awesome. Thanks for the tip!
  Reply With Quote
Old 3rd February 2009, 02:49 PM   #4
johnYks is offline johnYks  Australia
diyAudio Member
Join Date: May 2006
Hello Marc Brown

Peter Daniel has covered this topic extensively
on this thread:

diyAudio Forums diyAudio Forums > Top >Amplifiers >Chip Amps >In search of a perfect attenuator


Yours Sincerely
  Reply With Quote


line stage attenuation optionsHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Aikido line stage - plus phono line stage cjkpkg Tubes / Valves 1 22nd November 2008 10:50 PM
newbie questions for DIY audio - line-in attenuation avid Everything Else 1 20th August 2006 12:08 PM
Line stage preamp, based on SY's "Heretical Unity gain line stage" Danko Tubes / Valves 23 18th July 2005 05:07 AM
TL sub - line exit options Nuuk Subwoofers 15 20th August 2004 09:33 PM
Line Level attenuation habana Analogue Source 13 14th May 2003 08:45 PM

New To Site? Need Help?

All times are GMT. The time now is 06:44 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio