Too big to be a gainclone?? - Page 2 - 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 7th August 2003, 01:41 PM   #11
Banned
 
Join Date: Mar 2003
Location: Lisbon, Portugal
breguetphile,

Have you tested a 18k resistor instead of the 220k/0.1uf combo on the non-inv. input?
Anyway, the hum may be a question of joining the two channels together and run a thick wire from the star ground of one channel to the other. The mid point of that wire goes to the star ground of the case.
This is what you should do when you have only one transformer for the two channels.
In my experience, connecting each star ground of each channel to the case ground means hum.
You have to join them toguether and use the smallest length of wire you can.
You don't show internal pictures of your amp, so these are general suggestions.
Let me say that your amp is beautiful.
  Reply With Quote
Old 7th August 2003, 01:58 PM   #12
diyAudio Member
 
breguetphile's Avatar
 
Join Date: Mar 2003
Location: Indiana, USA
Default i'm hiding...

i'm hiding the internals for a reason! its ugly in there. i have everything as close as i could possibly get it but its kind of a rats nest, i plan on doing some rewiring once i get some decent wire. currently i was using radio shack's wrapping wire which is tinned 30 gauge copper, but its very hard to control and breaks easily. the star grounds are close so this will be easy to do (they are about 2 inches apart. and the chassis ground is about 3 inches from their midpoint.
__________________
Dawn: When men of reason go to bed. ~Ambrose Bierce
  Reply With Quote
Old 7th August 2003, 02:00 PM   #13
diyAudio Member
 
breguetphile's Avatar
 
Join Date: Mar 2003
Location: Indiana, USA
Default 18k

and i had used a 20k to ground in one permutation of my last gc and found the 220k/0.1uf to be favorable. as this amp is slightly different i'l probably give it a try on this one as well to make sure i'm not passing up a good thing.
__________________
Dawn: When men of reason go to bed. ~Ambrose Bierce
  Reply With Quote
Old 7th August 2003, 04:01 PM   #14
Banned
 
Join Date: Mar 2003
Location: Lisbon, Portugal
Default Re: i'm hiding...

Quote:
Originally posted by breguetphile
i'm hiding the internals for a reason! its ugly in there.
It may be ugly on the inside, but no problem for us.
On the outside it's prettier than my "PC Gainclone".
But looks aside, when I put it playing I'm in heaven.
Some people got out of my house needing medical assistance.
And some of them are used to high-end.
  Reply With Quote
Old 7th August 2003, 04:06 PM   #15
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Default Inside!

Don't be afraid, show us the inside!!!
  Reply With Quote
Old 7th August 2003, 04:45 PM   #16
diyAudio Member
 
breguetphile's Avatar
 
Join Date: Mar 2003
Location: Indiana, USA
i'm currently at work and i'm leaving on a trip for work this afternoon. if i get a chance i'll snap a shot after i get home, if not i will return very late tomorrow or early saturday and i may just give in and take an interior shot.
__________________
Dawn: When men of reason go to bed. ~Ambrose Bierce
  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
Freebird + Gainclone = "integrated" gainclone? bikehorn Chip Amps 9 5th January 2006 04:07 PM
JLH v Gainclone? Jezz-the-Fezz Solid State 5 12th December 2005 01:08 PM
Big gainclone steven344 Chip Amps 10 23rd November 2005 08:58 PM


New To Site? Need Help?

All times are GMT. The time now is 09:59 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