MIssion cambridge amplifier

C

Cees Keyer

Guest
Dear All

I've got a Mission Cambridge pre-amplifier.
I took it apart due and made digital pictures of the equipment, except
had an hard disk crash. Lost all the pictures, so i can't reassemble it.
And guessing it is a huge risk (it is not mine).

Any one out there with a complete circuit schematic or has pictures of
the inside (cable harness from power supply to amp board.)

tnx
in advance
 
On Nov 18, 9:29 am, Cees Keyer <pf0emc-not-th...@amsat.org-not-this>
wrote:
Dear All

I've got a Mission Cambridge pre-amplifier.
I took it apart due and made digital pictures of the equipment,
except
had an hard disk crash. Lost all the pictures, so i can't
reassemble it.
And guessing it is a huge risk (it is not mine).

Any one out there with a complete circuit schematic or has pictures
of
the inside (cable harness from power supply to amp board.)

tnx
in advance
Click to expand...
And you deleted the pix from the memory card too? When the computer
is repaired get a USB drive to back that stuff up. Sorry I can't help
with the amp.

G˛
 
<stratus46@yahoo.com> wrote in message
news:e22236bc-7ad9-400f-85a9-eb10f5afa101@d42g2000prb.googlegroups.com...
On Nov 18, 9:29 am, Cees Keyer <pf0emc-not-th...@amsat.org-not-this>
wrote:
Dear All

I've got a Mission Cambridge pre-amplifier.
I took it apart due and made digital pictures of the equipment,
except
had an hard disk crash. Lost all the pictures, so i can't
reassemble it.
And guessing it is a huge risk (it is not mine).

Any one out there with a complete circuit schematic or has pictures
of
the inside (cable harness from power supply to amp board.)

tnx
in advance
Click to expand...
And you deleted the pix from the memory card too? When the computer
is repaired get a USB drive to back that stuff up. Sorry I can't help
with the amp.

G˛


Yes, I thought that it was odd that the pix had gone from the camera as
well. Memory cards are so cheap now that I never delete anything from my
camera. When the card gets full, I just replace it with a new empty one, and
archive the full one away as my 'negatives'. Sorry also. I don't have any
info on the Mission, but it can't be that hard to reassemble correctly, can
it ? Most decent equipment uses different sized or shaped connectors at each
point, to preclude the possibility of refitting them incorrectly. Also,
after years of laying and being ty-wrapped in one place, a harness will
normally re-lie round about where it should be, if offered back in, and it
will be obvious where each connector goes. As a matter of interest, why did
you find it necessary to dismantle to this level in the first place ?

Arfa
 
On Wed, 19 Nov 2008 10:15:27 +0000, Arfa Daily wrote:

stratus46@yahoo.com> wrote in message
news:e22236bc-7ad9-400f-85a9-
eb10f5afa101@d42g2000prb.googlegroups.com...
On Nov 18, 9:29 am, Cees Keyer <pf0emc-not-th...@amsat.org-not-this
wrote:
Dear All

I've got a Mission Cambridge pre-amplifier. I took it apart due and
made digital pictures of the equipment,
except
had an hard disk crash. Lost all the pictures, so i can't
reassemble it.
And guessing it is a huge risk (it is not mine).

Any one out there with a complete circuit schematic or has pictures
of
the inside (cable harness from power supply to amp board.)

tnx
in advance

And you deleted the pix from the memory card too? When the computer
is repaired get a USB drive to back that stuff up. Sorry I can't help
with the amp.

G²


Yes, I thought that it was odd that the pix had gone from the camera as
well. Memory cards are so cheap now that I never delete anything from my
camera. When the card gets full, I just replace it with a new empty one,
and archive the full one away as my 'negatives'. Sorry also. I don't
have any info on the Mission, but it can't be that hard to reassemble
correctly, can it ? Most decent equipment uses different sized or shaped
connectors at each point, to preclude the possibility of refitting them
incorrectly. Also, after years of laying and being ty-wrapped in one
place, a harness will normally re-lie round about where it should be, if
offered back in, and it will be obvious where each connector goes. As a
matter of interest, why did you find it necessary to dismantle to this
level in the first place ?

Arfa
Click to expand...
Yes i deleted the pictures of the memory card as well.

I took it apart due to the awkward ticking noise it made.
Every 4 5ish second it made a tick sound, so the power supply was taken
out for checking the capacitors on ESR and leakage.
It is quite compact build so the inter pcb wiring was removed from the
pads. And i can't figure it out where what wire came from.
Schematics or service information is not available, even from the
distributor in the Netherlands.

Cees
 
"Cees Keyer" <pf0emc-not-this-@amsat.org-not-this> wrote in message
news:492456ec$0$184$e4fe514c@news.xs4all.nl...
On Wed, 19 Nov 2008 10:15:27 +0000, Arfa Daily wrote:

stratus46@yahoo.com> wrote in message
news:e22236bc-7ad9-400f-85a9-
eb10f5afa101@d42g2000prb.googlegroups.com...
On Nov 18, 9:29 am, Cees Keyer <pf0emc-not-th...@amsat.org-not-this
wrote:
Dear All

I've got a Mission Cambridge pre-amplifier. I took it apart due and
made digital pictures of the equipment,
except
had an hard disk crash. Lost all the pictures, so i can't
reassemble it.
And guessing it is a huge risk (it is not mine).

Any one out there with a complete circuit schematic or has pictures
of
the inside (cable harness from power supply to amp board.)

tnx
in advance

And you deleted the pix from the memory card too? When the computer
is repaired get a USB drive to back that stuff up. Sorry I can't help
with the amp.

G˛


Yes, I thought that it was odd that the pix had gone from the camera as
well. Memory cards are so cheap now that I never delete anything from my
camera. When the card gets full, I just replace it with a new empty one,
and archive the full one away as my 'negatives'. Sorry also. I don't
have any info on the Mission, but it can't be that hard to reassemble
correctly, can it ? Most decent equipment uses different sized or shaped
connectors at each point, to preclude the possibility of refitting them
incorrectly. Also, after years of laying and being ty-wrapped in one
place, a harness will normally re-lie round about where it should be, if
offered back in, and it will be obvious where each connector goes. As a
matter of interest, why did you find it necessary to dismantle to this
level in the first place ?

Arfa

Yes i deleted the pictures of the memory card as well.

I took it apart due to the awkward ticking noise it made.
Every 4 5ish second it made a tick sound, so the power supply was taken
out for checking the capacitors on ESR and leakage.
It is quite compact build so the inter pcb wiring was removed from the
pads. And i can't figure it out where what wire came from.
Schematics or service information is not available, even from the
distributor in the Netherlands.

Cees
Click to expand...
Ah, I see, you had to unsolder the wires. That explains it. Well, if it's
just the power supply to main board harness in a preamp, there surely can't
be that many wires, can there ? What is there - a ground or two maybe and a
positive and negative rail pair for the opamps ? As you know where the wires
go to at the preamp end, assuming that they are still attached to the preamp
board, then it shouldn't be difficult to determine where they came from on
the power supply. I'm willing to bet that if the loom had been in there a
long time, it's going to have formed itself into some sort of shape that
it's probably still fundamentally got. That should at least give you a clue
as to the general area that each wire goes to.

Arfa
 
On Thu, 20 Nov 2008 12:39:42 +0000, Adrian C wrote:

Cees Keyer wrote:
Dear All

I've got a Mission Cambridge pre-amplifier.

Model number?
Click to expand...
MOdel number is 778
tnx in advance
 
On Nov 19, 10:11 am, Cees Keyer <pf0emc-not-th...@amsat.org-not-this>
wrote:
On Wed, 19 Nov 2008 10:15:27 +0000, Arfa Daily wrote:
stratu...@yahoo.com> wrote in message
 And you deleted the pix from the memory card too? When the
computer
is repaired get a USB drive to back that stuff up. Sorry I can't
help
with the amp.

G˛

Yes, I thought that it was odd that the pix had gone from the
camera as
well. Memory cards are so cheap now that I never delete anything
from my
camera. When the card gets full, I just replace it with a new
empty one,
and archive the full one away as my 'negatives'. Sorry also. I
don't
have any info on the Mission, but it can't be that hard to
reassemble
correctly, can it ? Most decent equipment uses different sized or
shaped
connectors at each point, to preclude the possibility of
refitting them
incorrectly. Also, after years of laying and being ty-wrapped in
one
place, a harness will normally re-lie round about where it should
be, if
offered back in, and it will be obvious where each connector
goes. As a
matter of interest, why did you find it necessary to dismantle to
this
level in the first place ?

Arfa

Yes i deleted the pictures of the memory card as well.

I took it apart due to the awkward ticking noise it made.
 Every 4 5ish second it made a tick sound, so the power supply was
taken
out for checking the capacitors on ESR and leakage.
It is quite compact build so the inter pcb wiring was removed from
the
pads. And i can't figure it out where what wire came from.
Schematics or service information is not available, even from the
distributor in the Netherlands.

Cees
Click to expand...
If you haven't filled the card with new photos, this software can work
wonders - as it has for me.

http://www.datarescue.com/photorescue/

G˛
 
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