Talk About Network

Google


Register and Login
Nick
Password
Register create new account Sign up is FREE and you can post replies, new topics, bookmark posts and more!
Recover lost password


Audio > Audio Technology > Re: Amplifier P...
Latest [ Topics | Posts ] Archive Post A New Topic Post a Reply
<< Topic < Post Post 2 of 18 Topic 6903 of 7172
Post > Topic >>

Re: Amplifier Problem - ***SOLVED***

by "Richard Crowley" <rcrowley@[EMAIL PROTECTED] > Apr 22, 2008 at 12:38 PM

"EADGBE"  wrote ...
> That's when I found it -- a *microscopic* crack in the trace between
> the emitter of Q208 and its adjoining 3.3 ohm resistor.  The crack was
> so incredibly tiny that I easily overlooked it--repeatedly.
>
> I took one of my jumper leads and clipped one end of it to Q208's
> emitter and the other end of it to the 3.3 ohm resistor.
>
> I then took voltage measurements.  EVERYTHING WAS NOW ON SPEC:

Its hard to imagine how the output node (where the two
3.3 ohm resistors join) could be correct (6.4V) without
the path through the lower 3.3 ohm resistor and Q208?

But at least you got it working. Good for you. Trouble-
shooting  ("fault-finding" as they call it in the UK) discrete
circuits is rapidly becoming a lost art.
 




 18 Posts in Topic:
Amplifier Problem - ***SOLVED***
EADGBE <hwbosshoss@[EM  2008-04-22 12:15:17 
Re: Amplifier Problem - ***SOLVED***
"Richard Crowley&quo  2008-04-22 12:38:19 
Re: Amplifier Problem - ***SOLVED***
nospam@[EMAIL PROTECTED]   2008-04-22 19:53:27 
Re: Amplifier Problem - ***SOLVED***
John Phillips <news080  2008-04-22 20:09:23 
Re: Amplifier Problem - ***SOLVED***
nospam@[EMAIL PROTECTED]   2008-04-22 20:13:12 
Re: Amplifier Problem - ***SOLVED***
"geoff" <geo  2008-04-23 10:27:24 
Re: Amplifier Problem - ***SOLVED***
isw <isw@[EMAIL PROTEC  2008-04-22 21:04:39 
Re: Amplifier Problem - ***SOLVED***
"Mr.T" <MrT@  2008-04-23 18:36:32 
Re: Amplifier Problem - ***SOLVED***
"Richard Crowley&quo  2008-04-23 10:10:42 
Re: Amplifier Problem - ***SOLVED***
"Mr.T" <MrT@  2008-04-24 12:07:05 
Re: Amplifier Problem - ***SOLVED***
isw <isw@[EMAIL PROTEC  2008-04-23 20:40:41 
Re: Amplifier Problem - ***SOLVED***
"Mr.T" <MrT@  2008-04-24 14:42:49 
Re: Amplifier Problem - ***SOLVED***
"Richard Crowley&quo  2008-04-24 09:19:04 
Re: Amplifier Problem - ***SOLVED***
jakdedert <jakdedert@[  2008-04-24 11:31:30 
Re: Amplifier Problem - ***SOLVED***
"Mr.T" <MrT@  2008-04-25 11:47:53 
Re: Amplifier Problem - ***SOLVED***
EADGBE <hwbosshoss@[EM  2008-04-25 05:09:32 
Re: Amplifier Problem - ***SOLVED***
zekfrivo@[EMAIL PROTECTED  2008-04-25 12:13:43 
Re: Amplifier Problem - ***SOLVED***
"Arny Krueger"   2008-04-25 09:14:07 

Post A Reply:
  Go here to Signup

AddThis Feed Button


About - Advertising - Contact - Frequently Asked Questions - Privacy Policy - Terms of Use - Signup

Contact
tan12V112 Thu Aug 21 13:48:03 CDT 2008.