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Audio > Audio Technology > Re: Amplifier P...
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Re: Amplifier Problem - Revised Schematic

by Ol' Duffer <nospam@[EMAIL PROTECTED] > Apr 22, 2008 at 09:16 AM

In article <e79927cb-9552-41f4-81e9-0c380ce099b0
@[EMAIL PROTECTED]
>, hwbosshoss@[EMAIL PROTECTED]
 says...
> 
> I have revised the schematic further by adding the voltages at the
> base of Q205 and collector of Q204....
> 
> http://i240.photobucket.com/albums/ff58/eadgbe123/amplifier-2.jpg
> 
> I guess I don't have enough equipment to fix this problem.  I can't
> afford a 'scope right now.  This will have to go on a shelf until I
> can deal with it.

You don't need a scope for this one, just DC meter and brain power.
For the output transistors, Q207 base should be about one Volt higher
than Q208 base.  If not, either Q206 is shorted or Q205 is not sourcing
current.  If I can believe the voltages you show on Q205, it probably
has an open collector.
 




 38 Posts in Topic:
Amplifier Problem - Revised Schematic
EADGBE <hwbosshoss@[EM  2008-04-21 21:08:40 
Re: Amplifier Problem - Revised Schematic
"Richard Crowley&quo  2008-04-21 21:48:36 
Re: Amplifier Problem - Revised Schematic
don pearce <nospam@[EM  2008-04-22 15:18:26 
Re: Amplifier Problem - Revised Schematic
bz <bz+spr@[EMAIL PROT  2008-04-22 07:38:03 
Re: Amplifier Problem - Revised Schematic
bz <bz+ser@[EMAIL PROT  2008-04-22 07:45:45 
Re: Amplifier Problem - Revised Schematic
"Gareth Magennis&quo  2008-04-22 08:42:57 
Re: Amplifier Problem - Revised Schematic
"Gareth Magennis&quo  2008-04-22 12:21:55 
Re: Amplifier Problem - Revised Schematic
Eeyore <rabbitsfriends  2008-04-22 12:34:19 
Re: Amplifier Problem - Revised Schematic
"James" <jam  2008-04-22 07:33:36 
Re: Amplifier Problem - Revised Schematic
EADGBE <hwbosshoss@[EM  2008-04-22 04:54:48 
Re: Amplifier Problem - Revised Schematic
"James" <jam  2008-04-22 08:05:46 
Re: Amplifier Problem - Revised Schematic
bz <bz+ser@[EMAIL PROT  2008-04-22 12:26:29 
Re: Amplifier Problem - Revised Schematic
"James Sweet" &  2008-04-22 16:49:36 
Re: Amplifier Problem - Revised Schematic
Ol' Duffer <nospam@[EM  2008-04-22 09:16:43 
Re: Amplifier Problem - Revised Schematic
John Phillips <news080  2008-04-22 14:08:56 
Re: Amplifier Problem - Revised Schematic
EADGBE <hwbosshoss@[EM  2008-04-22 06:22:28 
Re: Amplifier Problem - Revised Schematic
EADGBE <hwbosshoss@[EM  2008-04-22 06:25:04 
Re: Amplifier Problem - Revised Schematic
"Arny Krueger"   2008-04-22 09:44:01 
Re: Amplifier Problem - Revised Schematic
EADGBE <hwbosshoss@[EM  2008-04-22 07:26:42 
Re: Amplifier Problem - Revised Schematic
John Phillips <news080  2008-04-22 14:31:07 
Re: Amplifier Problem - Revised Schematic
zekfrivo@[EMAIL PROTECTED  2008-04-22 14:34:55 
Re: Amplifier Problem - Revised Schematic
EADGBE <hwbosshoss@[EM  2008-04-22 07:43:33 
Re: Amplifier Problem - Revised Schematic
zekfrivo@[EMAIL PROTECTED  2008-04-22 15:29:49 
Re: Amplifier Problem - Revised Schematic
don pearce <nospam@[EM  2008-04-22 16:35:38 
Re: Amplifier Problem - Revised Schematic
EADGBE <hwbosshoss@[EM  2008-04-22 08:17:28 
Re: Amplifier Problem - Revised Schematic
zekfrivo@[EMAIL PROTECTED  2008-04-22 15:51:20 
Re: Amplifier Problem - Revised Schematic
John Phillips <news080  2008-04-22 16:03:42 
Re: Amplifier Problem - Revised Schematic
"Richard Crowley&quo  2008-04-22 09:44:41 
Re: Amplifier Problem - Revised Schematic
EADGBE <hwbosshoss@[EM  2008-04-22 08:41:02 
Re: Amplifier Problem - Revised Schematic
EADGBE <hwbosshoss@[EM  2008-04-22 10:04:49 
Re: Amplifier Problem - Revised Schematic
EADGBE <hwbosshoss@[EM  2008-04-22 11:01:14 
Re: Amplifier Problem - Revised Schematic
EADGBE <hwbosshoss@[EM  2008-04-22 11:13:19 
Re: Amplifier Problem - Revised Schematic
zekfrivo@[EMAIL PROTECTED  2008-04-22 18:42:00 
Re: Amplifier Problem - Revised Schematic
"David Farber"   2008-04-22 11:29:34 
Re: Amplifier Problem - Revised Schematic
Eeyore <rabbitsfriends  2008-04-22 19:52:31 
Re: Amplifier Problem - Revised Schematic
EADGBE <hwbosshoss@[EM  2008-04-22 12:05:26 
Re: Amplifier Problem - Revised Schematic
zekfrivo@[EMAIL PROTECTED  2008-04-22 20:09:33 
Re: Amplifier Problem - Revised Schematic
jakdedert <jakdedert@[  2008-04-22 19:34:40 

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tan13V112 Sat Jul 5 19:31:09 CDT 2008.