Not Your Mommy's GC - 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 13th April 2004, 07:08 PM   #21
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Default dd gallery

Nuuk, and anyone else who has GC galleries, if you think this is worthy, feel free to post my pics in your gallery (full version and more pics are on my temporary web site linked in this thread and "www" below). Just send me an email so I know. My pics take time to load due to slow web server, just hit "refresh" to get them all.
  Reply With Quote
Old 13th April 2004, 09:28 PM   #22
Nuuk is offline Nuuk  United Kingdom
diyAudio Member
 
Nuuk's Avatar
 
Join Date: Feb 2003
Location: Somerset, SW England
Quote:
Nuuk, and anyone else who has GC galleries, if you think this is worthy, feel free to post my pics in your gallery
Certainly worthy! I'll pop it in when I get time.
__________________
The truth need not be veiled, for it veils itself from the eyes of the ignorant.
  Reply With Quote
Old 14th April 2004, 02:01 AM   #23
diyAudio Member
 
Join Date: Sep 2003
Location: Illinois
nice work, actually, excellent.

i have never seen such an amazing looking first project!! i think you might be the next Peter Daniel.

keep up the good work!

i like the LEDs. i dont get all this noise stuff, its not like you'd notice it with a 3886 or most speakers.

-mike
  Reply With Quote
Old 14th April 2004, 03:28 AM   #24
diyAudio Member
 
Join Date: Jan 2003
Location: Maple Grove, MN
Send a message via AIM to AJ Bertelson
are those the heatsinks that were posted for sale on electric goldmine about a month ago?
  Reply With Quote
Old 14th April 2004, 03:42 PM   #25
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Default Responses

Quote:
are those the heatsinks that were posted for sale on electric goldmine about a month ago?
Yes, I have used those heat sinks. I have actually been telling everyone here about the heat sinks and WBT RCA connectors (both of which you see on my GC) from Electronic Goldmine for a while, even back when they (the heat sinks) were not even discounted as much as they are now. I was so new to this forum I didn't even know if this was proper behavior. See:
http://www.diyaudio.com/forums/showt...774#post302774
http://www.diyaudio.com/forums/showt...577#post292577
http://www.diyaudio.com/forums/showt...069#post245069
WBT RCA Jacks and IRF540 --> deals here?

I note that they do ring somewhat when dinged with your finger. So dampening is somthing you might want to conisder. I've tried felt pads underneath, but interwoven rubber bands seem to work the best. Whether or how it affects the sound I am not so sure of yet. I like a sharp HF response, so maybe it doesn't bug me.
  Reply With Quote
Old 14th April 2004, 05:43 PM   #26
Nuuk is offline Nuuk  United Kingdom
diyAudio Member
 
Nuuk's Avatar
 
Join Date: Feb 2003
Location: Somerset, SW England
Quote:
I note that they do ring somewhat when dinged with your finger. So dampening is somthing you might want to conisder. I've tried felt pads underneath, but interwoven rubber bands seem to work the best.
Click the image to open in full size.

Full story

here.
__________________
The truth need not be veiled, for it veils itself from the eyes of the ignorant.
  Reply With Quote
Old 22nd June 2004, 12:36 PM   #27
cpemma is offline cpemma  United Kingdom
diyAudio Member
 
Join Date: Jul 2003
Location: S Yorkshire OK
Quote:
Originally posted by Nuuk
I was always lead to believe that LED's were noisy items best kept away from hi-fi, even to the point of removing them from the mains distribution strips.
One possible source for the bad LED publicity...

I've a NAD CD-player and one thing I remember from reviews around the time is that NAD said they'd used an LCD for the info panel rather than the usual LED panel to reduce noise from the rapid multiplex switching of segments carrying several mA each.

However, an indicator led on steady current is a totally different kettle of fish.
  Reply With Quote
Old 22nd June 2004, 12:57 PM   #28
diyAudio Member
 
Join Date: Nov 2002
Location: Essex, UK
I seem to recall reading that NEON indicators generate noise on the supply lines...

Arnie
  Reply With Quote
Old 23rd June 2004, 05:36 PM   #29
diyAudio Member
 
Join Date: Jul 2003
Location: Berkeley, California
Default Heatsinks and case

Very nice work. I like the look. I was wondering if the inside of the amp gets hot. I didn't see any slits in the top of the case for the warm air to escape. Are they not needed or did you come up with a cleverl solution to let the warm air dissipate? Thanks,

Doovieman
  Reply With Quote
Old 24th June 2004, 04:12 PM   #30
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Default Ventilation

Quote:
I was wondering if the inside of the amp gets hot. I didn't see any slits in the top of the case for the warm air to escape.
OK, the heatsinks don't get very hot unless you really work the amp, but I do so I was concerned about this. I drilled some ventilation holes in the cover.

I don't know if I said this before, but I have a very very minimal set of tools.

So I created a hole pattern on the computer that would overlap the heat sinks, printed it out taped it to the cover and drilled away. Here are the results. You see that some of the powder coating on the chassis cover kind of stuck and didn't drill away. Anyway, the ventilation seems ok and I can make the holes bigger if necessary. Also, if you look at the web pages you will see that I planned for this in that one of the first things I did was to drill vent holes in the bottom of the chassis to allow for convection through the top holes when I got around to drilling those.

Click the image to open in full size.
Click the image to open in full size.

This ventilation is pretty good, but not great. When playing this very loudly, the sinks get hot enough to burn your hand, and the vents don't really evacuate air that quickly. I'm going to do a kind of thermal study to see what gives, but it certainly works just fine and I've had no problems with extended high volume runs.
  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
Not Your Mommy's BOSOZ - Finished lgreen Pass Labs 21 26th December 2004 10:25 PM


New To Site? Need Help?

All times are GMT. The time now is 01:10 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