Grounding problem of my OTL headphone amplifier - diyAudio
Go Back   Home > Forums > Amplifiers > Headphone Systems
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 17th May 2006, 02:17 PM   #1
ronardi is offline ronardi  Hong Kong
diyAudio Member
Join Date: Jul 2004
Location: HK
Default Grounding problem of my OTL headphone amplifier

I've just finished an OTL headphone amplifier, the sound is good, but it "hum"! the hum changes with VR volume. I've tried serveral ways trying to get rid of it, as the following:

1. connect the ground of RCA with a serial 1 ohm resistor to power ground in PCB.
2. connect the earth of power inlet socket to the chassis
3. connect the case of VR to the case of the amp.

is there anything wrong? plz help!
Andrew Chan
  Reply With Quote
Old 17th May 2006, 04:19 PM   #2
diyAudio Member
Join Date: Aug 2005
Try moving the source & amp around a bit? If your source is too close to a computer or other RFI sources then no grounding scheme can really help you.
  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
Grounding problem? Bas Horneman Tubes / Valves 16 5th September 2008 03:33 PM
grounding problem..need help jegandren Power Supplies 13 30th July 2008 02:52 PM
Headphone amp grounding (w/ diagram) redrabbit Headphone Systems 5 18th March 2007 08:55 PM
Grounding problem LaZarus Solid State 8 23rd March 2004 12:15 PM
comments please on star grounding points for tube headphone amp jarthel Headphone Systems 13 25th June 2003 06:19 PM

New To Site? Need Help?

All times are GMT. The time now is 12:29 PM.

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