LME49830 based amp - diyAudio
Go Back   Home > Forums > Blogs > My DIY projects

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
I returned to DIY electronics in 2009 after a 20 year pause by building a few kits to get in shape. This blog is for me to keep track of my progress.
Rate this Entry

LME49830 based amp

Posted 4th September 2010 at 06:02 PM by alexcp
Updated 8th October 2012 at 10:26 AM by alexcp

This is an implementation of National's reference design for LME49830 with two matched pairs of 2SK1530+2SJ201 per channel. The PCBs were made using National's gerbers (thus National's logos). Sounds surpisingly good, but it has just been completed; I did not have a chance to listen to it carefully yet.

Update: I rebuilt the amp as a pair of monoblocks, each delivering healthy 200W into 8 ohms. It now looks tidier.

Update: the original Gerbers from National are nowhere to be found since national.com was merged into ti.com. Attached are the original archives downloaded from the national.com.
Attached Thumbnails
Click image for larger version

Name:	IMG_2067.jpg
Views:	2192
Size:	72.0 KB
ID:	251   Click image for larger version

Name:	IMG_2066.jpg
Views:	3192
Size:	65.9 KB
ID:	252   Click image for larger version

Name:	IMG_2068.jpg
Views:	1312
Size:	53.8 KB
ID:	253   Click image for larger version

Name:	IMG_2069.jpg
Views:	3944
Size:	56.7 KB
ID:	254  
Attached Files
File Type: zip LME49830_EF125WT1_Gerbers_Web.zip (133.8 KB, 474 views)
File Type: zip HP_PowerSupply_4B_Gebers_Web.zip (87.4 KB, 285 views)
Views 7295 Comments 5 Email Blog Entry
Total Comments 5


  1. Old Comment
    Very old post.....how does it sound, if you still have it?
    Posted 26th July 2012 at 05:56 PM by Inprogress Inprogress is offline
  2. Old Comment
    alexcp's Avatar
    It sounds ok; not that I can point at any specific problem, but it always leaves something to be desired.
    Posted 2nd August 2012 at 11:10 AM by alexcp alexcp is offline
  3. Old Comment
    Do you have AN-1850 & AN1849 gerber file ?

    I can't find them on internet because national.com become ti.com .
    Posted 26th September 2012 at 03:52 AM by cctv628 cctv628 is offline
  4. Old Comment
    alexcp's Avatar
    I have them and I attached them to the blog post.
    Posted 28th September 2012 at 09:02 PM by alexcp alexcp is offline
  5. Old Comment
    Thanks a lot
    Posted 2nd October 2012 at 12:40 PM by cctv628 cctv628 is offline
Hide this!Advertise here!

New To Site? Need Help?

All times are GMT. The time now is 11:29 AM.

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