Replacement for LM318H Op AMP in BGW AMP 750 A/B - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 29th August 2009, 03:35 PM   #1
qsa is offline qsa  Germany
diyAudio Member
qsa's Avatar
Join Date: May 2007
Default Replacement for LM318H Op AMP in BGW AMP 750 A/B

Hello is there replacement for LM318H possibile ?

Want improve sound in mid and high

How about LME49710 or NE 5534 as replacement

I think amplifier can better sounding with new op amp LME49710
  Reply With Quote
Old 29th August 2009, 05:13 PM   #2
diyAudio Member
jackinnj's Avatar
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
LME49710HA about $8.30 from DK
Why, silly hare, are you fleeing from the fierce jaws of the lion now grown tame?
  Reply With Quote
Old 29th August 2009, 06:39 PM   #3
jcx is offline jcx  United States
diyAudio Member
Join Date: Feb 2003
Location: ..
the circuit makes a difference - the 318 was sometimes used with a discrete fet input bypassing its inupt diff pair- not many pin compatiable drop-ins for that cirucit
  Reply With Quote
Old 30th August 2009, 12:41 AM   #4
anatech is offline anatech  Canada
diyAudio Moderator
anatech's Avatar
Join Date: Jun 2004
Location: Georgetown, On
Keep the LM318. It's the best op amp for that circuit. There are other things you should be paying attention to, like the DC offset adjustment. Output transistor matching, in fact, try some of the newer outputs.

In feed forward, the LM318 is capable of slewing at 70 V/uS. That's faster than what you are looking at as replacements.

"Just because you can, doesn't mean you should" my Wife
  Reply With Quote
Old 30th May 2012, 12:33 PM   #5
Lenin21 is offline Lenin21  United Kingdom
diyAudio Member
Join Date: Mar 2011
Smile LM318 - Good, but not the best...

Use one of Linear technology's higher spec versions of the LM318/LM118 - the LT318A/LT118A.

A drop-in replacement, lower noise, better PSRR.
  Reply With Quote
Old 1st June 2012, 02:40 PM   #6
djk is offline djk
diyAudio Member
djk's Avatar
Join Date: Feb 2001
Location: USA
Fix the coupling caps in the BGW first, the opamp is trivial by comparison.
Candidates for the Darwin Award should not read this author.
  Reply With Quote
Old 2nd June 2012, 07:44 PM   #7
diyAudio Member
Join Date: Mar 2001
Location: Brazil
Originally Posted by djk View Post
Fix the coupling caps in the BGW first, the opamp is trivial by comparison.

I couldn't agree more with this statement.

Improving C1 (10uF electrolytic) and C3 (50uF electrolytic) quality might improve things a lot more than swapping the 318.
  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
AD 846 replacement Fasen Digital Line Level 23 12th January 2015 08:18 PM
CDM Pro 9 replacement? moray james Digital Source 0 14th June 2007 12:08 AM
OP-amp replacement... Lyra Solid State 6 20th April 2006 10:52 AM
OP amp replacement mieze245 Chip Amps 0 19th September 2004 07:46 PM
replacement op-amp ? iceman Solid State 2 14th July 2003 03:28 PM

New To Site? Need Help?

All times are GMT. The time now is 05:33 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2