Go Back   Home > Forums > Amplifiers > Headphone Systems

Headphone Systems Everything to do with Headphones

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 30th July 2012, 05:50 PM   #11
diyAudio Member
 
monty78pig's Avatar
 
Join Date: Aug 2011
Location: London
Send a message via Skype™ to monty78pig
I wouldn't use the output from a power cube without a smoothing cap, op-amps have excellent power supply rejection but won't be able to reject the output of a bridge rectifier without smoothing .

For a simple single supply C-Moy amplifier I'd use a 1000uF cap for smoothing. Perhaps being fed in series with a 4R7 resistor for extra smoothing.
__________________
With perfect linearity, it is impossible to go off on a tangent. Also; My Sziklai pairs are better than your MOSFETs/Darlingtons/Pentodes/Triodes
  Reply With Quote
Old 1st August 2012, 07:50 AM   #12
diyAudio Member
 
Join Date: Oct 2008
Quote:
Originally Posted by Leodegarius View Post
USB runs at 3.5 to 5V and 500mA, if I am not mistaken. If you wanted it into the computer, could you use a rubber mat to insulate the tin case, or make a rubber sleeve for it?
The insulation would work I believe. Would 5 V/500 mA be enough power though?

That's a good idea with the capacitor. While I had the power jack from RadioShack, I temporarily hooked it up with some alligator clips to some different power supplies, and there was a lot of noise and hum. So I will try that capacitor and maybe the resistor and see how it is!

Thanks guys! When that power jack comes in, I will let you guys know what combination works well.
  Reply With Quote
Old 1st August 2012, 08:19 AM   #13
diyAudio Member
 
Join Date: Jun 2012
In a cmoy the voltage is split so 5V would give rail voltages of 2.5v which would be very low for most chips.

You could use a simple voltage doubler (NE555) and follow it with a 10R and 10000uF RC filter which should clean it up enough
  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
quick question timwebb Car Audio 10 22nd March 2012 05:16 AM
testing voltage on CMOY - a question clothmoth Chip Amps 2 25th May 2009 03:27 PM
Cmoy power supply simple question wiredmonkey Chip Amps 2 17th July 2007 12:44 AM
question about output power of CMOY georgiano Chip Amps 4 23rd April 2007 08:44 PM
Quick quick question ! guitvinny Pass Labs 6 7th February 2007 04:20 PM


New To Site? Need Help?

All times are GMT. The time now is 11:08 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