E-Bay Amp, was a gift - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 10th February 2009, 02:09 AM   #1
diyAudio Member
 
Join Date: Oct 2008
Default E-Bay Amp, was a gift

So my great wife was seeing how much I have started researching my newly found hobby and decided to give me a little gift. She went on e-bay and got me a pre-assembled gainclone amp. Needless to say, I was pretty happy to get it. I started doing a little research on it and found it on this site:

http://www.elecsky.com/index.php?mai...&products_id=2

It looks a little shady to me, the caps on my board have the same values on them, but are 'RX27' on the top label (RX21 in the pic), so are obvious knockoffs.

I was trying to get some detailed info on how to wire the unit together and any general ideas that you may have about the board.
  Reply With Quote
Old 10th February 2009, 03:05 AM   #2
john65b is offline john65b  United States
diyAudio Member
 
john65b's Avatar
 
Join Date: Jan 2005
Location: Chicago
I wish my wife was as nice as yours. Mine rolls her eyes back into her head when we discuss my little hobby.

Download the app note on the ebay auction for the LM3886 chip amp - pretty basic connections.

Not a bad price all in all including assembled and with heat sink...
__________________
All right, but apart from the sanitation, medicine, education, wine, public order, irrigation, roads, the fresh water system and public health, what have the Romans ever done for us? Life of Brian
  Reply With Quote
Old 10th February 2009, 03:20 AM   #3
diyAudio Member
 
Join Date: Oct 2008
Well, I do have to admit that I am pretty lucky!

Where do you see that ebay auction app note? Do you have a link? I am pretty confident doing work that someone else has verified, but I am at a loss when I need to figure it out myself.

I would rather ask for help then make a mistake when working with electricity, better to admit that I don't know then to end up proving Darwin's theory is right......
  Reply With Quote
Old 10th February 2009, 03:32 AM   #4
john65b is offline john65b  United States
diyAudio Member
 
john65b's Avatar
 
Join Date: Jan 2005
Location: Chicago
Near the bottom of the auction...look for the App note LM3886 link...
__________________
All right, but apart from the sanitation, medicine, education, wine, public order, irrigation, roads, the fresh water system and public health, what have the Romans ever done for us? Life of Brian
  Reply With Quote
Old 10th February 2009, 03:36 AM   #5
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
App note is here

Brian GT manual is here

these will prob help you out.

I don't see any diodes on your boards. Hopefully they are just out of the camera angle.


But the price was good and they look pretty. you should be able to get something nice out of them.
__________________
Retired from DIY (2010) but still lurking now and again. My DIY audio projects- PartTimeProjects.com.
  Reply With Quote
Old 10th February 2009, 04:07 AM   #6
diyAudio Member
 
Join Date: Oct 2008
there are no diodes, but there is a rectifier board on it, does that do the same thing?
  Reply With Quote
Old 10th February 2009, 05:04 AM   #7
diyAudio Member
 
Join Date: May 2008
Yes, it does the same thing.
__________________
If you've always done it like that, then it's probably wrong. (Henry Ford)
  Reply With Quote
Old 10th February 2009, 05:06 AM   #8
diyAudio Member
 
Join Date: Oct 2008
So there is one rectifier board for two outputs, does this make sense? I guess that I just have to run two wires off of one output to each input (v-, v+ and ground)
  Reply With Quote
Old 10th February 2009, 07:08 AM   #9
diyAudio Member
 
Join Date: May 2008
Exactly.
__________________
If you've always done it like that, then it's probably wrong. (Henry Ford)
  Reply With Quote
Old 11th February 2009, 03:46 AM   #10
diyAudio Member
 
lanchile's Avatar
 
Join Date: Sep 2008
Location: AREA 51
Thumbs up Lucky dog!

Wow,I wish I had a wife like yours.Mine does not care a bit of my staff.Congratulation dmongrain and make sure for this Valentine's day She gets something nice.
  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
Gift Certificates DigitalJunkie Everything Else 1 7th June 2007 01:14 AM
Here's an appropriate Christmas gift for all of us Saurav Everything Else 0 13th December 2003 04:42 PM


New To Site? Need Help?

All times are GMT. The time now is 02:23 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