Preamp improvements/suggestions - Page 2 - 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 9th June 2011, 06:17 PM   #11
diyAudio Member
 
Join Date: Apr 2011
Default Preamp version 2

Hi, attached is the corrected schematic.

Note: the opamp in the schematic was just a random one to get the thing to simulate - a type recommended is a TL071 .

Thanks to Mooly and Bonsai for their input - plenty of things to consider in future designs!
Attached Files
File Type: pdf preamp2.pdf (67.1 KB, 14 views)
  Reply With Quote
Old 9th June 2011, 06:25 PM   #12
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
The opamp is fine as drawn.

D1 that has appeared. Very sensible for battery powered equipment. Only comment is that it robs the circuit of around 0.7 volt... and on battery thats important.

You could add a diode in inverse parallel across the supply (using say a In4001 type) that would protect the circuit. Depending on the battery and how much curent was available that could overheat the 10 ohm...

Personally I would go with inverse parallel and keep as much voltage as possible for the circuit.
__________________
-------------------------------------------------------
A simulation free zone. Design it, build it, test it.
  Reply With Quote
Old 9th June 2011, 06:41 PM   #13
diyAudio Member
 
Join Date: Apr 2011
Is that also called a diode snubber?
  Reply With Quote
Old 9th June 2011, 06:51 PM   #14
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
A diode snubber usually refers to a diode across an inductive load such as a relay coil etc.

I don't know a diode across the supply has an official name tbh Reverse polarity protection I guess.
__________________
-------------------------------------------------------
A simulation free zone. Design it, build it, test it.
  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
First Project - Seas Induss Kit - Suggestions/Improvements sirizak Multi-Way 12 24th February 2011 08:52 PM
B1 passive + Pearl 2 phono preamp + DCPS improvements? intrator Pass Labs 0 17th December 2010 07:46 PM
Bottlehead Foreplay III improvements, suggestions, alternatives? CoolJazz Tubes / Valves 4 3rd December 2009 04:02 PM
twisted pear Preamp/other suggestions for Preamp kit LukeDuke Chip Amps 1 1st February 2008 09:57 PM
Preamp suggestions r0cket- Solid State 1 23rd September 2003 02:05 PM


New To Site? Need Help?

All times are GMT. The time now is 03:30 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