EASY diy gainclone ??? - 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 28th May 2003, 01:02 AM   #1
diyAudio Member
 
Join Date: May 2003
Location: Thursday Island, Torres Strait (still Queensland), Australia
Default EASY diy gainclone ???

I'd like to build a gainclone...


Where would I find a site for newbies. (perhaps there is tooo much info )

I'm looking for a hand-holding guide; any ideas where ?

Thanks in advance, I think this forum idea is excellent.

Adam
Gold Coast, Australia
  Reply With Quote
Old 28th May 2003, 08:59 AM   #2
diyAudio Member
 
Join Date: Oct 2002
Location: California
There is a lot of info on the web and it can be a little tough to sort through.
For a basic clone with clear schematics and parts list try this link.

http://www.geocities.com/rjm003.geo/...io/diy_gc.html

Good luck
  Reply With Quote
Old 28th May 2003, 01:34 PM   #3
Nuuk is offline Nuuk  United Kingdom
diyAudio Member
 
Nuuk's Avatar
 
Join Date: Feb 2003
Location: Somerset, SW England
I'll let my Gainclone page speak for me.
__________________
The truth need not be veiled, for it veils itself from the eyes of the ignorant.
  Reply With Quote
Old 28th May 2003, 02:06 PM   #4
fedde is offline fedde  Netherlands
diyAudio Member
 
Join Date: Jul 2002
Location: Eindhoven, the Netherlands
Send a message via ICQ to fedde
Or have a look at my site

It's the original Thorsten clone with quite some of info to build one...

www.fedde.tk

Fedde
  Reply With Quote
Old 28th May 2003, 06:04 PM   #5
diyAudio Member
 
Shoog's Avatar
 
Join Date: Aug 2002
Location: Eire
Default I tried this

I tried building a single supply gainclone from scratch but had a few chips blow up and I couldnt get rid of the hum. I amtherefore trying Rod Elliots project. Still in the construction stage, but I am confident.

http://sound.westhost.com/project72.htm
  Reply With Quote
Old 28th May 2003, 08:48 PM   #6
fedde is offline fedde  Netherlands
diyAudio Member
 
Join Date: Jul 2002
Location: Eindhoven, the Netherlands
Send a message via ICQ to fedde
If you follow my recommendations precisely and do not play music at ear-bleeding levels you theoretically will not kill any LM chips...

Fedde
  Reply With Quote
Old 28th May 2003, 09:11 PM   #7
diyAudio Member
 
Join Date: Sep 2002
Location: Sacramento, California
Default It is easier than you think. . .

Go for it. I have no formal electronics training and instead read an intro to electronics book. With my minimal knowledge it was relatively easy to build. I encourage you to follow Thorsten's inverted schematic as I did. I am very pleased with my results, but I did have a couple of setbacks along the way. The first mistake I made was installing the capacitor on the V- rail backward, which promptly exploded electrolytic goo into the bottom of my amp case (no Variac to test things out first). With that problem fixed I had one happily running channel.

On the second channel I fried one chip before I realized my mistake. I used the uninsulated LM3875, and although I was using a mica insulator, a burr on the case was shorting out the back of the chip. After deburring the case and soldering in a new chip I had a fully functional (and very nice sounding) amplifier.

Just take your time and you'll do just fine. After you gather all of the parts, familiarize yourself with them, and look at some of the layouts people have used. After you're done, take a break and quadruple check your wiring. It may seem intimidating, I'd bet once you try it yourself you be hooked.

Thor Amp page (not mine)
__________________
SRMC
  Reply With Quote
Old 28th May 2003, 09:29 PM   #8
fedde is offline fedde  Netherlands
diyAudio Member
 
Join Date: Jul 2002
Location: Eindhoven, the Netherlands
Send a message via ICQ to fedde
Yep, I managed to fry a resistor and cap by making that mistake. Always measure the resistance between the opamp case and the heatsink before power on !!! If it's zero then something is very wrong

Fedde
  Reply With Quote
Old 28th May 2003, 09:31 PM   #9
fedde is offline fedde  Netherlands
diyAudio Member
 
Join Date: Jul 2002
Location: Eindhoven, the Netherlands
Send a message via ICQ to fedde
Default Re: It is easier than you think. . .

Quote:
Originally posted by SRMC
Thor Amp page (not mine)
That's the one. And don't forget the second page:
http://home.student.utwente.nl/f.s.b...-thor-amp.html

All are reachable from www.fedde.tk

Fedde
  Reply With Quote
Old 28th May 2003, 09:35 PM   #10
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Fedde

Why don't you put your site address in your profile, (look under user cp), then it's always there as a button at the bottom of your posts?
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  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
Easy & Safe & Good sounding gainclone tube buffer ionomolo Tubes / Valves 2 29th March 2009 11:41 PM
Easy question, sorry jhawker23 Car Audio 2 31st December 2007 04:13 PM
Easy to build amp Turboman Solid State 15 14th November 2005 08:56 PM
is it really this easy? MEGA_amp Pass Labs 4 2nd August 2005 01:55 AM
Easy ESLs rick57 Multi-Way 8 21st May 2004 01:35 AM


New To Site? Need Help?

All times are GMT. The time now is 03:18 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