Testboard LME49830 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Reply
 
Thread Tools Search this Thread
Old 24th October 2013, 06:22 PM   #1
olafk is offline olafk  Germany
diyAudio Member
 
Join Date: Mar 2011
Location: germany
Default Testboard LME49830

Hi there,

I have built a test board for the LME49830, exactly according to the datasheet. Only conventional components were used, no SMD.
The board works. The sound is warm and clear.
If anyone can use it, I can upload the layout. I do not want it to develop. It was just for fun, the LME49830 has a friend gave me.

regards Olaf
Attached Images
File Type: jpg LME49830_Proto_Top.jpg (193.0 KB, 1067 views)
File Type: jpg LME49830_01.jpg (256.3 KB, 1024 views)
File Type: jpg PCB_TopView.JPG (127.2 KB, 1028 views)
File Type: jpg schematic.JPG (110.8 KB, 1028 views)
  Reply With Quote
Old 24th October 2013, 07:21 PM   #2
WSJ is offline WSJ  United States
diyAudio Member
 
WSJ's Avatar
 
Join Date: May 2009
Location: GILROY, CA
The layout looks great. Would you consider selling PCBs? Just an etched board would be fine.
  Reply With Quote
Old 24th October 2013, 07:28 PM   #3
olafk is offline olafk  Germany
diyAudio Member
 
Join Date: Mar 2011
Location: germany
I can upload the PDF or the sprint-layout-file.




Etching I do just for me and that's more than enough...
Sorry.
  Reply With Quote
Old 25th October 2013, 03:20 AM   #4
diyAudio Member
 
Join Date: Aug 2012
how is the distortion performance? any THD curves you can post? Ive seen the comparison between all the LME series but with IRF how is the distortion performance and at what BIAS?
  Reply With Quote
Old 25th October 2013, 03:45 AM   #5
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
You can buy the Nat Semi board on Ebay from at least one HK/Chinese vendors -- they are legit Nat Semi stock.
  Reply With Quote
Old 25th October 2013, 03:30 PM   #6
olafk is offline olafk  Germany
diyAudio Member
 
Join Date: Mar 2011
Location: germany
Quote:
Originally Posted by rhythmsandy View Post
how is the distortion performance? any THD curves you can post? Ive seen the comparison between all the LME series but with IRF how is the distortion performance and at what BIAS?
Hi,

I tested the chip with +-32V. I set the bias to 5V without further experiments. On the oscilloscope no distortion can be seen. But I have no professional equipment.

regards

Last edited by olafk; 25th October 2013 at 03:41 PM.
  Reply With Quote
Old 26th October 2013, 09:58 PM   #7
diyAudio Member
 
palstanturhin's Avatar
 
Join Date: Jun 2011
Looked such a fun little project, that I just had to make one too...

Click the image to open in full size.
Click the image to open in full size.
  Reply With Quote
Old 26th October 2013, 10:30 PM   #8
olafk is offline olafk  Germany
diyAudio Member
 
Join Date: Mar 2011
Location: germany
Very nice pcb design with all the features. Congratulation.
Makes me want to replicate.

Regards Olaf
  Reply With Quote
Old 27th October 2013, 08:53 PM   #9
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
[QUOTE=palstanturhin;3680973]Looked such a fun little project, that I just had to make one too...

Very nice
  Reply With Quote
Old 27th October 2013, 09:29 PM   #10
WSJ is offline WSJ  United States
diyAudio Member
 
WSJ's Avatar
 
Join Date: May 2009
Location: GILROY, CA
palstanturhin,
Your design is excellent! You could sell the PCB for at least $25 each.
I like your design better than the National PCB in AN-1850.

http://application-notes.digchip.com/006/6-8907.pdf
  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
Lme49830 nickarsow Chip Amps 98 16th January 2016 01:31 AM
LME49830 PCBs... Boscoe Solid State 48 18th September 2012 12:05 AM
LME49830 PCB... Boscoe Solid State 18 29th August 2012 07:26 AM
Lme49830 enzedone Solid State 6 21st February 2008 04:26 PM


New To Site? Need Help?

All times are GMT. The time now is 09:07 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki