Attenuating Preamp Filter Question - 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 22nd February 2013, 02:46 PM   #1
graygem is offline graygem  United States
diyAudio Member
 
Join Date: Jul 2010
Default Attenuating Preamp Filter Question

In the attenuating preamp circuit below, what is the high pass filter frequency? I know with out the attenuating resistor (R6), it would be 16Hz, but I don't know what the R6 resistor does to it. My thought was, the R5 and R6 are in parallel, in series with R7, making it at 31Hz.
Thank you.

Attenuation circuit test2.jpg
__________________
Professional Newbie.
  Reply With Quote
Old 22nd February 2013, 04:13 PM   #2
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
Pin 2 is a virtual earth, therefore R6 and R7 are in parallel. Their combination is then in series with R5.
  Reply With Quote
Old 22nd February 2013, 05:18 PM   #3
graygem is offline graygem  United States
diyAudio Member
 
Join Date: Jul 2010
Thank you, I see. This would still give me 31Hz, right?
__________________
Professional Newbie.
  Reply With Quote
Old 22nd February 2013, 08:50 PM   #4
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
5265R and 1uF gives 30.2Hz. I don't know how you got 31Hz.
  Reply With Quote
Old 26th February 2013, 02:03 PM   #5
graygem is offline graygem  United States
diyAudio Member
 
Join Date: Jul 2010
I don't know either Doing it again gave me your 30.2Hz
Thank you
__________________
Professional Newbie.
  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
Filter sequence in a Bandpass filter question BachAudioDK Multi-Way 3 28th January 2012 11:20 PM
Attenuating the CSS EL70 motosapien Full Range 2 25th June 2011 09:20 AM
B1 for attenuating 4 outputs....help ggetzoff Pass Labs 8 19th November 2009 01:44 AM
attenuating...... Lostcause Everything Else 6 27th November 2008 03:16 PM
Attenuating Power Supply? ghetto Solid State 9 31st July 2003 02:05 AM


New To Site? Need Help?

All times are GMT. The time now is 07:45 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