Page 108 - Tandem Techniques
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trimming capacitors situated in the probe, one for each of the two coils mentioned, and are adjustable
from outside the probe.
Figure 2.28
The Probe of a NMR Spectrometer
with a Superconducting Magnet
The probe shown is the standard type of NMR probe and cannot be used for flow through samples.
Consequently, it would not be appropriate if the NMR probe was to be used in a tandem configuration.
Although the electrical connections remain the same, the physical shape must be changed. In the
standard instrument the probe is not accessible from both the top and the base of the magnet but usually
only from the base. This means that the sample cannot flow though the cell vertically downwards
exiting at the base of the instrument but must take the form of a U. This
