Stilllegung 400 MHz Festkörper-NMR-Spektrometer
Am Organisch-Chemischen Institut der Universität Heidelberg soll ein
funktionstüchtiges Bruker DPX400WB Festkörper-NMR-Spektrometer
(Installation 1999) mit UltraShield Magnet und einem 4mm
H/X-CP-MAS-Probenkopf stillgelegt werden. Weitere technische Details auf
Anfrage.
Potentielle InteressentInnen wenden sich bitte an:
Prof. Dr. Peter Hofmann
Organisch-Chemisches Institut der Universität Heidelberg
Lehrstuhl für Organische Chemie III
Im Neuenheimer Feld 270
D-69120 Heidelberg
Tel.: ++49-6221-54 8502
Tel.: ++49-6221-54 8415 (Sekretariat, Frau Brigitte Horvat)
E-Mail: ph@uni-hd.de
Mittwoch, 14. Mai 2008
Wanted: Bruker micro-imaging probe
Folks,
We have an ancient, highly-modified, Bruker micro-imaging probe here that is
used in a 4.7T WB system.
This is the type of micro-imaging probe that took only 30 or 40 Amps max,
had air-cooling only (not water), and most importantly, had 8 electrical
connecting pins at the bottom of the gradient set, in 2 rows of 4, that
pushed down into a green block with 8 holes with electrical compression
fittings in it - which connected to the plug at the bottom of the probe
body, and from there to the gradient amps. These probes were in use in the
mid-1990's - not sure when they were discontinued.
Our probe-body has been in poor shape for a long time, and the cylindrical
fittings have been getting pushed out of the green block each time the
gradient set is inserted. Eventually, some wires gave way on the bottom of
the cylindrical connectors, and now we're down to a 2-axis gradient set.
Attempted in-house repair has only made the situation worse.
I was wondering if anyone has such an old probe-body lying around, no longer
in use? I know the gradient sets used to burn out fairly easily, so maybe
there are a couple of these in closets somewhere with no gradient set to
attach to it?
Alterantively, if you have a complete set of probe body plus gradients, let
me know. I realize the gradients are probably of no use without the probe
body. But if you stopped using your micro-imaging probe after upgrading to a
micro2.5 or Bruker's newer 60 Amp PSU's and have no use for the older probe,
we might be able to buy it for a nominal fee. We don't need RF coils - as
we do a lot of wierd X-nuclei at strange frequencies, so it doesn't matter
if the 1H coils in the probe are not 200 MHz!
I have photos of our probe and connectors, and can email them to anyone who
is not sure if they have what we're looking for!
Many Thanks,
Ross Mair
--
Ross Mair
Staff Scientist
Harvard-Smithsonian Center for Astrophysics
60 Garden St, MS 59, email: rmair@cfa.harvard.edu
Cambridge, MA 02138 Phone: (617) 495 7218
USA Fax: (617) 496 7690
We have an ancient, highly-modified, Bruker micro-imaging probe here that is
used in a 4.7T WB system.
This is the type of micro-imaging probe that took only 30 or 40 Amps max,
had air-cooling only (not water), and most importantly, had 8 electrical
connecting pins at the bottom of the gradient set, in 2 rows of 4, that
pushed down into a green block with 8 holes with electrical compression
fittings in it - which connected to the plug at the bottom of the probe
body, and from there to the gradient amps. These probes were in use in the
mid-1990's - not sure when they were discontinued.
Our probe-body has been in poor shape for a long time, and the cylindrical
fittings have been getting pushed out of the green block each time the
gradient set is inserted. Eventually, some wires gave way on the bottom of
the cylindrical connectors, and now we're down to a 2-axis gradient set.
Attempted in-house repair has only made the situation worse.
I was wondering if anyone has such an old probe-body lying around, no longer
in use? I know the gradient sets used to burn out fairly easily, so maybe
there are a couple of these in closets somewhere with no gradient set to
attach to it?
Alterantively, if you have a complete set of probe body plus gradients, let
me know. I realize the gradients are probably of no use without the probe
body. But if you stopped using your micro-imaging probe after upgrading to a
micro2.5 or Bruker's newer 60 Amp PSU's and have no use for the older probe,
we might be able to buy it for a nominal fee. We don't need RF coils - as
we do a lot of wierd X-nuclei at strange frequencies, so it doesn't matter
if the 1H coils in the probe are not 200 MHz!
I have photos of our probe and connectors, and can email them to anyone who
is not sure if they have what we're looking for!
Many Thanks,
Ross Mair
--
Ross Mair
Staff Scientist
Harvard-Smithsonian Center for Astrophysics
60 Garden St, MS 59, email: rmair@cfa.harvard.edu
Cambridge, MA 02138 Phone: (617) 495 7218
USA Fax: (617) 496 7690
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