Balanced/unbalanced line receiver - Page 5 - diyAudio
Go Back   Home > Forums > Live Sound > Instruments and Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Instruments and Amps Everything that makes music, Especially including instrument amps.

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 25th February 2014, 06:32 PM   #41
diyAudio Member
Join Date: Feb 2014
Hi Andrew, the resistors in the diagram (2M?) do go to signal ground. Which in itself raises a question. At the moment (based on other research) my signal grounds are connected to my chassis and supply grounds. I do intend to fit a ground lift switch which would isolate the signal ground from the chassis and supply grounds, but have not tested this yet.

In term of the resistors being in parallel with something. Are they not in parallel with the input opamp's Rin? I assumed this to be very high so concluded that the source would effectively see the 2M?

I understand that the guitar is not a balanced signal, my original spec was for a multi purpose input tat could accept an unbalanced guitar OR a balanced input (accepting that because it needs to be Hi-Z there might be a noise penalty) does that make sense do you think?
  Reply With Quote
Old 25th February 2014, 06:51 PM   #42
diyAudio Member
Join Date: Sep 2009
Location: Pretoria
Rod Elliot ESP site is your answer.
  Reply With Quote
Old 26th February 2014, 08:07 AM   #43
Did it Himself
diyAudio Member
richie00boy's Avatar
Join Date: Nov 2003
Location: Gloucestershire, England, UK
The INA217 does not have internal resistors on the front end op-amp, the datasheet lists input impedance as 60 meg.

Carry on
__________________ my website for UK diy audio people - designs, PCBs, modules and more.
  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
line level unbalanced to balanced converter steevo Analog Line Level 17 16th February 2014 03:09 PM
Balanced to Unbalanced Line Conversion Loren42 Tubes / Valves 33 4th January 2011 05:31 PM
Unbalanced to Balanced Line Level XFMR wrenchone Solid State 8 22nd October 2005 08:06 PM
Balanced line stage, quistion's + unbalanced lykkedk Pass Labs 4 19th December 2002 11:58 PM
Zen Balanced Line Stage Balanced vs Unbalanced macka Pass Labs 28 11th December 2002 06:18 AM

New To Site? Need Help?

All times are GMT. The time now is 04:27 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