Go Back   Home > Forums > Commercial Sector > Swap Meet
Home Forums Rules Articles Store Gallery Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Swap Meet Sell your stuff here, who knows, some other fanatic might be interested!

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 17th February 2011, 10:38 PM   #1
pjanda1 is offline pjanda1  United States
diyAudio Member
 
pjanda1's Avatar
 
Join Date: Jan 2005
Location: The Nebraska Panhandle
Default Chip amp parts: 3875, regs, PS, heatsink

I received a poorly built chip amp in partial trade for a good one. I was working on it, but I rammed a drill bit through the undersized, overvoltage toroid. I bought an amp that'll suit my purposes better, and I'm ready to get rid of whats left.

signal PCBs, chips and chassis: The LM3875s are in "HiBou" PCBs. They worked when I took it apart! (aside from the hum due to the goofed up grounding the builder employed). The chassis has a perforated steel top that I didn't picture. How about $20 for this mess?

The PS board is a chipamp.com/brianGT with the 860 diodes. It has a couple of 4700uf Nichicons soldered in, as I was about to add regulators. $10?

The regulators are brand new. They are the NTE versions of the LM338K. My local shop had them in stock, so I gave them $16 each! New K package are $10 each at digikey. As you can see, I sloppily cut some AL angle to fit, then added an isolated screw. You should be able to P2P the necessary caps and resistors onto that (assuming you put the big caps on the diode PCB). These are brand new, never used. I can through in four basic 100uf caps. Ad resistors appropriate to your application, and you should be set. $15 for the regs, "heatsinks" and caps?

Or, $40 for the whole thing. Again, the regs are brand new and cost me $32. Just at a transformer and you are good to go!

Paul
Wild Burro Audio Labs - DIY Full Range Speakers
Attached Images
File Type: jpg chassis:chips.jpg (180.0 KB, 125 views)
File Type: jpg PS.jpg (114.4 KB, 120 views)
  Reply With Quote
Old 17th February 2011, 10:39 PM   #2
pjanda1 is offline pjanda1  United States
diyAudio Member
 
pjanda1's Avatar
 
Join Date: Jan 2005
Location: The Nebraska Panhandle
Oops, this pic didn't stick the first time.

Paul
Wild Burro Audio Labs - DIY Full Range Speakers
Attached Images
File Type: jpg regulators.jpg (117.6 KB, 120 views)
  Reply With Quote
Old 30th March 2011, 01:27 AM   #3
pjanda1 is offline pjanda1  United States
diyAudio Member
 
pjanda1's Avatar
 
Join Date: Jan 2005
Location: The Nebraska Panhandle
Bump.

Paul
Wild Burro Audio Labs - DIY Full Range Speakers
  Reply With Quote

Reply


Hide this!Advertise here!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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
In need of a lrage heatsink for my chip amp, any ideas where to get one? Boscoe Chip Amps 12 13th July 2010 01:24 PM
Regulated PS for Chip amp jomesh Chip Amps 6 17th January 2010 08:50 PM
LM3886 & Others Chip Amp Heatsink Clamp Solution MartyM Chip Amps 7 18th October 2007 04:36 PM
Yet Another 3875 Heatsink Question dsavitsk Chip Amps 0 4th April 2005 05:29 PM
Trade your DAC parts for chip amp parts jeff mai Swap Meet 3 12th July 2004 03:51 PM


New To Site? Need Help?

All times are GMT. The time now is 04:25 AM.

Page generated in 0.15289 seconds (32.64% PHP - 67.36% MySQL) with 11 queries

Copyright ©1999-2012 diyAudio