Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

The Lounge A place to talk about almost anything but politics and religion.

John Curl's Blowtorch preamplifier part III
John Curl's Blowtorch preamplifier part III
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 Yesterday, 09:44 PM   #29731
PMA is offline PMA  Europe
diyAudio Member
 
PMA's Avatar
 
Join Date: Apr 2002
Location: Prague
Quote:
Originally Posted by scott wurcer View Post
The LF356, etc. had enough variation in BW and cap load drive that some customers had to select or worse rework boards.
I confirm the cap load issues of TL071 series.
__________________
Pavel Macura http://pmacura.cz/audiopage.html
  Reply With Quote
Old Yesterday, 10:47 PM   #29732
Max Headroom is offline Max Headroom  Australia
diyAudio Member
 
Max Headroom's Avatar
 
Join Date: Jan 2013
Location: West Australia, near to the beach, natural ambient sounds mostly.
TL07x have always been useless as line output drivers but for internal stages with mid to high impedance load they have been opamp of choice especially in devices with high opamp count eg mixing desks etc the fet inputs and low quiescent current and low cost is ideal.
Driven correctly and loaded correctly TL07x sound fine and have long been a staple.


Dan.
  Reply With Quote
Old Today, 12:51 AM   #29733
Mark Johnson is offline Mark Johnson  United States
diyAudio Member
 
Mark Johnson's Avatar
 
Join Date: May 2011
Location: Silicon Valley
John Curl's Blowtorch preamplifier part III
I quite enjoy the Apt Holman preamp which is chock full of TL072s (duals).
  Reply With Quote
Old Today, 01:02 AM   #29734
morinix is offline morinix  United States
diyAudio Member
 
Join Date: Jun 2006
Whilst working at Alesis in the 90’s I pulled a strip of TL084’s and upon close inspection saw that they were originally etched as TL074’s. What’s up with that?
__________________
Robert Morin
  Reply With Quote
Old Today, 10:37 AM   #29735
RNMarsh is offline RNMarsh  United States
diyAudio Member
 
RNMarsh's Avatar
 
Join Date: May 2012
Location: 2457 Cascade Trail; Cool, CA. 95614
Why does the noise floor dynamically rise when signal is applied. [CD player.]

Here is rise with only one tone applied.

Noise with 5KHz signal.JPG


Why does this happen? Does not appear in a S/N measurement?


THx-RNMarsh

Last edited by RNMarsh; Today at 10:40 AM.
  Reply With Quote
Old Today, 10:43 AM   #29736
PMA is offline PMA  Europe
diyAudio Member
 
PMA's Avatar
 
Join Date: Apr 2002
Location: Prague
Ever heard about noise shaping?
__________________
Pavel Macura http://pmacura.cz/audiopage.html
  Reply With Quote

Reply


John Curl's Blowtorch preamplifier part IIIHide 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

Forum Jump


New To Site? Need Help?

All times are GMT. The time now is 12:19 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki