Point-to-Point LM3886 - Page 3 - 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 26th May 2011, 02:10 PM   #21
diyAudio Member
 
tigersilver's Avatar
 
Join Date: Mar 2011
Blog Entries: 2
screwdriver meter
Click the image to open in full size.
  Reply With Quote
Old 28th May 2011, 12:28 AM   #22
diyAudio Member
 
Join Date: Jun 2003
Location: Wroclaw
Quote:
Originally Posted by 6L6 View Post
zygibajt - Very nice so far!! I am looking forward to seeing how you make the rest of the connections.
Well it is ot so far. The amp was built some 5 years ago when the whole GC chip amps boom exploded. It is supplied with Yuasa batteries and there is the charger behind them. The black power switch does not supply power (the circuit is soldered directly to batteries) but it switches the charger to batteries on anf off both negative and positive rail so when I'm listening only the batteries are connected to circuit. In the mean time I change all the wires to Cardas chassis wires, here with Vampire Cast copper ones. By today this GC is unused and the batteries are dead after extensive use for the past years. I'm more into class A amps by today. It is extremely important to keep the loop: negative cap/chip/positive cap as short as possible hence my pictures in this post. This makes the chip way stable and not reactive to capacitive loads.

Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
  Reply With Quote
Old 28th May 2011, 02:55 PM   #23
wiatrob is offline wiatrob  United States
diyAudio Member
 
wiatrob's Avatar
 
Join Date: Apr 2008
Location: The Island of Alameda
Quote:
Originally Posted by 6L6 View Post
I was perusing the local electronics surplus store and saw that they had a handful of LM3886 in the bins, and thought it might be fun to wire up a pair and see how they do.
6L6,

JB Saunders? I'm heading there today...
  Reply With Quote
Old 28th May 2011, 07:53 PM   #24
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Yes, it was Saunders.

No, I am not going there today, instead I'm hiking.

Do look thorough the tubes - they are selling an estate, and there is some wild stuff there lately!.

Do drop me a PM the next time you need to head that way, I would be happy to meet up there and then grab a cup of coffee and chat audio!
  Reply With Quote
Old 30th May 2011, 04:34 PM   #25
wiatrob is offline wiatrob  United States
diyAudio Member
 
wiatrob's Avatar
 
Join Date: Apr 2008
Location: The Island of Alameda
Quote:
Originally Posted by 6L6 View Post
Yes, it was Saunders.

No, I am not going there today, instead I'm hiking.

Do look thorough the tubes - they are selling an estate, and there is some wild stuff there lately!.

Do drop me a PM the next time you need to head that way, I would be happy to meet up there and then grab a cup of coffee and chat audio!
I ended up making only a quick pass through for switches.

OT: I culled a batch of tubes right after they got the batch in, grabbed some 12BH7As and a bunch of rectifier tubes... Will touch base, Drop me a PM next time you go hiking
  Reply With Quote
Old 30th May 2011, 07:20 PM   #26
diyAudio Member
 
merlin2069er's Avatar
 
Join Date: Sep 2008
Location: Toronto
Blog Entries: 1
Send a message via MSN to merlin2069er
I've got a spare heat sink about 4"x 6"x 2" thick. I'm going to attempt to wire it point to point, mount the lm3886 to the heat sink and use it as a cover.

I'm just a bit concerned having stuff hanging from the top of the case might cause a few headaches down the road.
  Reply With Quote
Old 3rd June 2011, 04:49 PM   #27
diyAudio Member
 
tigersilver's Avatar
 
Join Date: Mar 2011
Blog Entries: 2
lm 3886
Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.


Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Too much bass as C rifa (y) 0.0047.
Improved use Rubycon photo-flash 200uf help.
voice is more clear.
Click the image to open in full size.

Outside to some minor adjustments, including cylinders C.
Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Now ... the sound overall is desirable, may be change about C rifa (y) 4n7
---
If the wrong language. I'm sorry.
  Reply With Quote
Old 3rd June 2011, 06:08 PM   #28
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Bravo! Your builds are very well executed and have considerable style. How do you like this compared to your earlier build?
  Reply With Quote
Old 3rd June 2011, 06:18 PM   #29
Banned
 
Join Date: Jan 2008
Blog Entries: 2
Hey, hey.

Will you guys PLEASE read Pano's blog about the posting vs. uploading of large images. It's extremely inconsiderate to post so many huge images in this way.

http://www.diyaudio.com/forums/blogs...ges-forum.html

w
  Reply With Quote
Old 3rd June 2011, 10:37 PM   #30
jemraid is offline jemraid  United Kingdom
diyAudio Member
 
Join Date: Aug 2004
Location: NE Derbyshire
Hi all,

Well knock me down wiv a fevver! I thought I was the only one who made boxes from wood.

Click the image to open in full size.

I did this in 2004 or 5 can't quite remember, anyway I used Thorsten's inverted circuit, this is my little web page about it: DIY Integrated Gainclone amplifier made in the UK from locally sourced components

Things have moved on a bit now and I'm thinking of rebuilding it to a non-inverted with a 2x 10,000 uf snubberized PS per amp. The transformers are 160VA 25V.

Great thread I love it really informative. Thanks.

Jim
__________________
FH3 build using very simple tools and a point to point Gain Clone with largish power supply. http://www.jasread.com/fh3/index.html
  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
Point to point, from scatch build of the K-12G jmillerdoc Tubes / Valves 0 25th October 2009 12:40 AM
Wire Wrap connections for point to point mashaffer Tubes / Valves 10 7th July 2007 01:11 PM
Benifits of point to point wiring for digital circuit? MGH Digital Source 15 14th September 2006 10:17 PM
Anyone use magnet wire for point to point wiring projects? Hybrid fourdoor Parts 10 2nd February 2004 08:11 AM
Audio Note's Kit One done in point-to-point wiring Wram Tubes / Valves 18 29th April 2003 10:59 PM


New To Site? Need Help?

All times are GMT. The time now is 06:26 PM.


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