A quick (haha, no really) grounding question - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 21st December 2006, 09:20 PM   #1
diyAudio Member
geaugafletcher's Avatar
Join Date: Feb 2006
Default A quick (haha, no really) grounding question

Hello all, I'm assembling an LM4780 kit from Audiosector - but using half the kit. In other words, it's a stereo amp with one LM4780 chip. My question is this:

Is there any reason not to set the grounding up like this:

I'm grateful for any feedback or discussion.

For information's sake, three inputs will go to a rotory selector switch - the 'winner' passes the signal on two a DPDT toggle that'll switch between main amp and headphone amp. From there, the main amp signal goes to a volume pot, then to the amp. The headphone signal has the same sort of setup.

This is a lot of wire for the input signal to travel, I know, but it's the best I could come up with. All input signal will travel through shielded wire scavenged from Radio Shack shielded audio cables. Again, any advice or discussion is very welcome.
  Reply With Quote
Old 22nd December 2006, 12:49 PM   #2
CarlosT is offline CarlosT  United States
diyAudio Member
Join Date: Oct 2006
I'm sorry but your picture shows two LM4780s?
  Reply With Quote
Old 22nd December 2006, 03:53 PM   #3
diyAudio Member
geaugafletcher's Avatar
Join Date: Feb 2006
Yes, I know. That picture isn't of the amplifier on my bench right now, but shows the same grounding scheme I'd like to employ. I'm asking a slightly general question about wiring up Audiosector LM4780 boards.

The signal and ground/common wire travel together from input jacks to selector switch to amp/headphone amp toggle to pot to amp to binding posts. It'd be an unbroken line, no star grounding.

Similarly, the Audiosector PS and amp boards are tied together as shown with just one ground wire tied to the chassis.

Does that clarify my questions?
  Reply With Quote


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
OPT grounding question Nihilist Tubes / Valves 16 2nd June 2009 03:06 AM
quick grounding question gain Power Supplies 7 22nd October 2008 04:19 PM
Quick question about star grounding jn2630 Tubes / Valves 8 21st January 2008 02:31 AM
Quick quick question ! guitvinny Pass Labs 6 7th February 2007 05:20 PM
grounding question skyraider Chip Amps 1 9th March 2004 10:12 AM

New To Site? Need Help?

All times are GMT. The time now is 02:00 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2