Project: Stepped attenuator. 35 steps! - 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 14th February 2011, 03:15 PM   #1
diyAudio Member
 
Join Date: Dec 2010
Location: Lillehammer, Norway
Default Project: Stepped attenuator. 35 steps!

Ok, my Audiosector amp kit is in the mail and I am closer to my first utterly custom design integrated amp. To mention a few features: Magic eye tubes for level indication, bantam patch for inputs/outputs, iPod connector with integrated power as well as switched mains power outlet on the front panel...

There will be two 35 steps attenuators, one for each channel. These are heavy duty Russian switches with extremely rugged design.
I gather the lower volume range will make do with less expensive resistors than for the "sweet spot".
I have even considered introducing a high shelf filter for the upper frequencies as the gain approaches maximum level, for a smoother listening experience and out of care for my tweeters. Has anyone else tried this?
Also, I need to make this a series/shunt operator as my swithces are one pole only. Any tips and hints are greatly appreciated!

Click the image to open in full size.
  Reply With Quote
Old 20th March 2011, 10:00 AM   #2
diyAudio Member
 
Join Date: Dec 2010
Location: Lillehammer, Norway
Default Shunted linear

In my research I came across this article, and got very inspired! I can buy a set of 35 equal value resistors, and a shunt resistor. I gather the factor of 6.7:1 between the two resistors is a reasonable choice the first time I do this. However I can alter any value along the way by swapping resistors if I find it necessary at a later stage.
Progression!
  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
FS Elma Stepped Attenuator 24 steps 100K captaink Swap Meet 1 19th June 2009 01:31 PM
Basic questions about 256 steps attenuator Mrpong Pass Labs 2 9th May 2007 06:46 PM
Cheap Stepped Attenuator Project metalman Parts 21 22nd December 2004 07:51 PM
0 to -12dB Attenuator in 0,5dB steps ! Junoman Solid State 8 6th June 2003 06:58 PM
How many steps in custom ladder attenuator jwb Solid State 18 2nd April 2003 07:43 PM


New To Site? Need Help?

All times are GMT. The time now is 05:42 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