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

Chip Amps Amplifiers based on integrated circuits

eBay mono LM1875 kit
eBay mono LM1875 kit
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, 08:25 PM   #261
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
Quote:
Originally Posted by FauxFrench View Post
OK, we don't ask..........
"Scattered", do you mean the sine-wave signal modulated on top of the saw-tooth signal? If so, isn't it the consumption of the amplifier that causes the sine-wave?
you mean the 2khz tone through the amp...it could be...


..good night...
  Reply With Quote
Old Yesterday, 08:56 PM   #262
FauxFrench is offline FauxFrench  France
diyAudio Member
 
Join Date: Dec 2017
Location: The mountains, calm and quiet.
Quote:
Originally Posted by chermann View Post
yep...you are the expert...explain me
Hi Chris,

I suggest you put a fan nearby the heatsink when you work with the amplifier in the laboratory. A fan nearby will make the heatsink at least 5 times more efficient. Huge heatsinks are for the final product, in the lab a smaller heatsink and a fan is a much more economical solution.

For the rail voltage: The rail capacitors are discharged by the current to the amplifier. But, the current to the amplifier is not constant but largely dependent on the load current. The load current is sine-wave shaped (1KHz) so the current to the amplifier will have an important 1KHz component as well. This 1KHz discharge of the rail capacitors is what you see.
  Reply With Quote
Old Yesterday, 09:03 PM   #263
FauxFrench is offline FauxFrench  France
diyAudio Member
 
Join Date: Dec 2017
Location: The mountains, calm and quiet.
Quote:
Originally Posted by chermann View Post
you mean the 2khz tone through the amp...it could be...

..good night...

Didn't you just write 1KHz? Interests add to economical amounts, not frequencies


Good night!
  Reply With Quote

Reply


eBay mono LM1875 kitHide 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
LM1875 Ebay dual channel pcb question nenad88 Chip Amps 11 29th August 2018 11:21 PM
Chinese Mono LM1875 Board Twil Chip Amps 54 23rd April 2018 08:04 AM
ebay lm1875 pcb asuslover Chip Amps 7 27th August 2016 03:58 AM
Running two LM1875 mono amp from single psu si82 Chip Amps 21 2nd June 2014 03:32 PM
Just fired up my new dual mono lm1875 Gainclone. Shoog Chip Amps 5 19th January 2004 06:09 PM


New To Site? Need Help?

All times are GMT. The time now is 04:58 AM.


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