Head-Fi: Covering Headphones, Earphones and Portable Audio  
  #1 (permalink)  
Old 09-14-2003, 08:31 PM
OogeleyBoogeley's Avatar
100+ Head-Fi'er
 
Join Date: Feb 2003
Location: W. Lafayette, Indiana
Posts: 212
Default Current in the Signal path

Hey- this amp will never stop giving me problems!
Last time, I added the Elpac 24V supply for my META42, and found out that I needed to isolate my inputs and the 24V input jack. I did so, by adding a rubber gromit to the power input jack from the steel they were moutned in. Well, last week that gromit ripped and the short was created again. And this time, the current was going for a long enough time for something to happen.

Now, the right channel does not work. When I plug in the headphones, there is a loud popping noise. I used my voltmeter to try to look for the problem, and found out that there is 7V entering the audio signal path at the points R1 and R2. This current is only present when the opamp chip is in the socket, when it is out, there is no current. So, there is no signal going out to the headphone, just 7V. Does anyone have insight as to what my problem is, and if it is in anyway repairable?

Go ahead and tell me what a moron I am because I am lamenting, because I have a pair of HD-580s coming in this week, and no amp to drive them. Thanks for any help.

-Dan
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!Reddit!Facebook it!
Reply With Quote
  #2 (permalink)  
Old 09-14-2003, 09:35 PM
ppl's Avatar
ppl ppl is offline
500+ Member:
Building amps and assuring water resistance.
 
Join Date: Jun 2001
Location: Seattle, WA. USA
Posts: 1,747
Default

my first thought is a new op amp but the EL-2001 Virtual ground driver could be also bad
__________________
http://www.last.fm/user/ppl/

"In my many years I have come to a conclusion that one useless man is a shame, two is a law firm, and three or more is a congress. - John Adams (1735-1826)"

"enjoying lawfully acquired music and video on your own time, in your own place and in your own way is not piracy-it's freedom."
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!Reddit!Facebook it!
Reply With Quote
Reply

Thread Tools

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



All times are GMT. The time now is 10:15 AM.


Flickr/Twitter

Follow headfi on Twitter!

See Head-Fi photos on Flickr!



Head-Fi's Sponsors
(Premier Sponsors bolded)

Head-Fi Blogs
and Facebook

Check out Head-Fi's new
Blogs section.

Featured Head-Fi Blogs:


Jude's "Take My Word"

 From Japan - by Sasaki

Currawong's Blog

(
Start your own Blog!)

Attention
Facebook Users



Join the official
Head-Fi.org
Facebook Group


Flickr/Twitter

Follow headfi on Twitter!

See Head-Fi photos on Flickr!



Head-Fi's Sponsors
(Premier Sponsors bolded)


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2010, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.3.2
Head-Fi.org