Revival of incredible LM3886 design - diyAudio
Go Back   Home > Forums > Commercial Sector > Group Buys

Group Buys Members group buys

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 17th November 2008, 11:33 AM   #1
udailey is offline udailey  United States
diyAudio Member
 
Join Date: Mar 2008
Default Revival of incredible LM3886 design

Summary: we (schro20 and udailey) are looking for a show of hands from people interested in a group buy of my_ref/revC kits (board + parts approx. 65$ for dual mono).

Details: We are putting together a group buy (assuming enough interest) for the my_ref/revC design of Mauro Penasa's (thanks, Mauro, for giving permission to use your design!). The board will be the same board as was last produced by the TwistedPear guys (thanks to Russ for the layout and Brian for some parts donations!). The (almost final) circuit diagram can be found at http://www.webalice.it/mauro.penasa/...ti_audio.html. For the power section take a look at the revA documents. For the amp section take a look at the revC documents. Each board contains a mono stage with its own power section and speaker protection relay. The only difference from Mauro's diagram are additional 220nF by pass caps parallel to the 100uF caps C6, C11, C9, C18, C19, and C20 (this corresponds to rev 1.2 of the layout Russ made).

To avoid bugs we will not make any changes to this design. In effect we are making a clone of the TwistedPear kits.

If we can get together orders for 100 mono kits (50 dual mono pairs for a stereo amp) we can make the economics work so that a pair of mono boards with all the parts will cost 65$ + shipping (a single mono kit will be 35$ + shipping). To make a complete amp you will need to add a transformer, heatsink, connectors, power switch, fuse, and a case. We will not be offering any of these latter parts.

This cost ESTIMATE is APPROXIMATE at this time (though it is based on actual bids; we just haven't pulled the trigger).

If you are interested (no commitment at this moment, but please be serious) in purchasing kits at this price please PM schro20 or udailey and let us know the number of mono kits (2 of those make one stereo amp) you would be interested in. We will wait 10 days to make a go-nogo decision.

There is an entire thread devoted to this circuit at My "audiophile" LM3886 approach if you wish to learn more.
Thanks
Uriah
  Reply With Quote
Old 17th November 2008, 12:17 PM   #2
Ted205 is offline Ted205  United Kingdom
diyAudio Member
 
Ted205's Avatar
 
Join Date: Jun 2008
what does the pcb look like
  Reply With Quote
Old 17th November 2008, 12:52 PM   #3
udailey is offline udailey  United States
diyAudio Member
 
Join Date: Mar 2008
Like this
Attached Images
File Type: gif revcpcb.gif (63.4 KB, 1984 views)
  Reply With Quote
Old 17th November 2008, 12:55 PM   #4
udailey is offline udailey  United States
diyAudio Member
 
Join Date: Mar 2008
The previous pic is from the backside. Here is the front.
Attached Images
File Type: gif revcpcb2.gif (63.5 KB, 1772 views)
  Reply With Quote
Old 17th November 2008, 02:01 PM   #5
diyAudio Member
 
Join Date: Oct 2008
I'm in...
  Reply With Quote
Old 17th November 2008, 02:01 PM   #6
diyAudio Member
 
Coreyk78's Avatar
 
Join Date: Sep 2008
Location: Farmington, MN
If you can make it close to the $65 price then I am in for 1 kit.
  Reply With Quote
Old 17th November 2008, 02:26 PM   #7
udailey is offline udailey  United States
diyAudio Member
 
Join Date: Mar 2008
Guys please let me know if you mean a mono kit or stereo.
Thanks
Uriah
  Reply With Quote
Old 17th November 2008, 04:10 PM   #8
diyAudio Member
 
Coreyk78's Avatar
 
Join Date: Sep 2008
Location: Farmington, MN
Quote:
Originally posted by udailey
Guys please let me know if you mean a mono kit or stereo.
Thanks
Uriah
Dual mono/Stereo for me, whichever way you would like to say it.
  Reply With Quote
Old 17th November 2008, 09:09 PM   #9
diyAudio Member
 
Join Date: Oct 2008
Quote:
Originally posted by warp_foo
I'm in...
Dual mono for me...
  Reply With Quote
Old 17th November 2008, 09:17 PM   #10
udailey is offline udailey  United States
diyAudio Member
 
Join Date: Mar 2008
Great! I bet we can get 50 pair in 10 days or so. Let everyone you know who might want some.
Uriah
  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
lm3886 design pingu Chip Amps 15 7th June 2009 02:49 PM
yet another lm3886 design geekysuavo Chip Amps 0 31st July 2008 10:18 PM
Pink Triangle PT Too PSU revival/understanding NATDBERG Analogue Source 8 1st April 2008 09:31 PM
Datasheet Lm3886 Design and others. samsagaz Chip Amps 1 29th December 2007 01:53 AM
LM3886 : which design ? Volta Chip Amps 10 22nd April 2006 06:02 PM


New To Site? Need Help?

All times are GMT. The time now is 10:50 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2