Audiolab 8000A circuit diagrams, etc.
 

A friend recently bought quite cheaply an old 8000A amp. He only wanted to
use the power amp sections, but one channel is now misbehaving. Hence he
has asked me if I can investigate and fix it. Since I am unfamiliar with
the circuit details, and know the design is held in high regard I am using
the chance to learn something about it. :-)

Alas, he has no documentation.

Does anyone have a copy of the circuit diagram, layout diagram, service
data, or even user manual for the early 8000A amplifier? If so, I'd
appreciate a copy of any info of this kind. :-)

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

Audiolab 8000A circuit diagrams, etc.
 

Jim Lesurf wrote:
A friend recently bought quite cheaply an old 8000A amp. He only wanted to
use the power amp sections, but one channel is now misbehaving. Hence he
has asked me if I can investigate and fix it. Since I am unfamiliar with
the circuit details, and know the design is held in high regard I am using
the chance to learn something about it. :-)

Alas, he has no documentation.

Does anyone have a copy of the circuit diagram, layout diagram, service
data, or even user manual for the early 8000A amplifier? If so, I'd
appreciate a copy of any info of this kind. :-)

Slainte,

Jim


I've got the user manual for the original 8000A (and indeed S, and some
decent photos of the C). It's 2Mb though - any good?

Rob

Audiolab 8000A circuit diagrams, etc.
 

AFAIK, Audiolab (nor Tag-McLaren) has never released schematics. I've
been trying to get one for my PPA for years.

Kal


On Mon, 19 Jun 2006 13:51:01 +0100, Jim Lesurf
wrote:

A friend recently bought quite cheaply an old 8000A amp. He only wanted to
use the power amp sections, but one channel is now misbehaving. Hence he
has asked me if I can investigate and fix it. Since I am unfamiliar with
the circuit details, and know the design is held in high regard I am using
the chance to learn something about it. :-)

Alas, he has no documentation.

Does anyone have a copy of the circuit diagram, layout diagram, service
data, or even user manual for the early 8000A amplifier? If so, I'd
appreciate a copy of any info of this kind. :-)

Slainte,

Jim

Audiolab 8000A circuit diagrams, etc.
 

In article , Kalman Rubinson
writes
AFAIK, Audiolab (nor Tag-McLaren) has never released schematics. I've
been trying to get one for my PPA for years.

Kal


Jeez... I used to work there some years ago, never thought to "lift"
one;)....



On Mon, 19 Jun 2006 13:51:01 +0100, Jim Lesurf
wrote:

A friend recently bought quite cheaply an old 8000A amp. He only wanted to
use the power amp sections, but one channel is now misbehaving. Hence he
has asked me if I can investigate and fix it. Since I am unfamiliar with
the circuit details, and know the design is held in high regard I am using
the chance to learn something about it. :-)

Alas, he has no documentation.

Does anyone have a copy of the circuit diagram, layout diagram, service
data, or even user manual for the early 8000A amplifier? If so, I'd
appreciate a copy of any info of this kind. :-)

Slainte,

Jim


--
Tony Sayer

Audiolab 8000A circuit diagrams, etc.
 

On Mon, 19 Jun 2006 15:10:43 +0100, tony sayer
wrote:

In article , Kalman Rubinson
writes
AFAIK, Audiolab (nor Tag-McLaren) has never released schematics. I've
been trying to get one for my PPA for years.

Kal


Jeez... I used to work there some years ago, never thought to "lift"
one;)....

Yeah. They've been very polite to me over the years but always gently
decline. But, I've gotten over the urge to modify the unit...........

Kal

Audiolab 8000A circuit diagrams, etc.
 

In article , Kalman Rubinson
wrote:
AFAIK, Audiolab (nor Tag-McLaren) has never released schematics. I've
been trying to get one for my PPA for years.

The may be 'reluctant'. :-/ However I did a google search for "audiolab
8000A" and "circuit diagrams". This gave URLs for half a dozen people
offerring to sell a second-hand 8000A with a circuit diagram. Hence I guess
some are around, but it may be that this is rare.

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

Audiolab 8000A circuit diagrams, etc.
 

On Mon, 19 Jun 2006 17:00:28 +0100, Jim Lesurf
wrote:

In article , Kalman Rubinson
wrote:
AFAIK, Audiolab (nor Tag-McLaren) has never released schematics. I've
been trying to get one for my PPA for years.

The may be 'reluctant'. :-/ However I did a google search for "audiolab
8000A" and "circuit diagrams". This gave URLs for half a dozen people
offerring to sell a second-hand 8000A with a circuit diagram. Hence I guess
some are around, but it may be that this is rare.

I do not think they are 'reluctant.' Their policy, expressed to me by
many, included the erstwhile CEO, is not to release any schematics.
This does not mean that some have not been 'liberated' and
distributed.

So, if anyone has done so for the PPA, I'd love to hear about it.

Kal

Audiolab 8000A circuit diagrams, etc.
 

AudioLab/IAG have said in an email to me that they don't provide diagrams.
However I've asked them if they can explain the reasons and perhaps
reconsider. They charge 55 UKP/hour + parts + post, but the unit in
question is a wreck that the owner bought for 40 UKP, so it doesn't seem
worth paying this much to him.

Alas, since this is IAG I fear their behaviour will be the same as when I
asked for Quad diagrams. Even ones that the old Quad used to provide quite
happily they refused to make available.

I've been told by someone else that:


] I found these items on the web - the first tantalisingly indicating a ckt
] diag to download. But you have to be registered to the forum - perhaps you
] are / could do so?
]
] http://www.diyaudio.com/forums/showt...threadid=30607
]
] http://www.hi-fi-insight.com/25/sepa...olab-8000a.htm

But I am not a registered member as I never use web forums.

Anyone here a member of diyaudio? If so, are you able to get a copy of the
diagram from the above?

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

Audiolab 8000A circuit diagrams, etc.
 

"Jim Lesurf" wrote in message
...
AudioLab/IAG have said in an email to me that they don't provide diagrams.
However I've asked them if they can explain the reasons and perhaps
reconsider. They charge 55 UKP/hour + parts + post, but the unit in
question is a wreck that the owner bought for 40 UKP, so it doesn't seem
worth paying this much to him.

Alas, since this is IAG I fear their behaviour will be the same as when I
asked for Quad diagrams. Even ones that the old Quad used to provide quite
happily they refused to make available.

I've been told by someone else that:


] I found these items on the web - the first tantalisingly indicating a
ckt
] diag to download. But you have to be registered to the forum - perhaps
you
] are / could do so?
]
] http://www.diyaudio.com/forums/showt...threadid=30607
]
]
http://www.hi-fi-insight.com/25/sepa...olab-8000a.htm

But I am not a registered member as I never use web forums.

Anyone here a member of diyaudio? If so, are you able to get a copy of the
diagram from the above?



Is this the one you want?

http://www.apah69.dsl.pipex.com/show/audiolab8000a.jpg

Audiolab 8000A circuit diagrams, etc.
 

In article , Keith G
wrote:

"Jim Lesurf" wrote in message
[snip]

Anyone here a member of diyaudio? If so, are you able to get a copy of
the diagram from the above?



Is this the one you want?

http://www.apah69.dsl.pipex.com/show/audiolab8000a.jpg

Beezer! Yes!! Looks right. Certainly has the correct o/p devices, and the
TL ic for the dc control, etc. I'll need to sit with the diagram and the
amp to be sure, but it looks spot-on! :-)))

Many thanks, Keith.

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html