Biodirect: chromatography-spectroscopy > nmr-nuclear-magnetic-resonance

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	NMR - Nuclear Magnetic Resonance
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Pre-Owned Lab Equipment

ID	Product	Manufacturer	Model #	Model 2	Status

2588	NMR:Signal Amplifier	Bruker	Preamplifier	HPPR/2	Available
Description/Details: Although the HPPR (High Performance Preamplifier) carries the transmitted signal to the sample it is primarily concerned with magnifying the relatively weak signals emitted from the sample. The two earliest versions (HPPR and HPPR/2) were located at the base of the magnet to amplify the NMR signal at the earliest possible opportunity and thus minimize losses along the cable. Once the signal has been amplified within the HPPR any subsequent losses in cabling are less critical. Improvements in magnet shielding has enabled consoles to be located closer to the magnet and the latest versions (known as the internal HPPR) is now housed within the AQS/2 rack itself with obvious advantages in terms of space requirements, modularity etc. The preamplifier also transmits and receives the deuterium (or fluorine) lock signals and is used in the wobble routine. Regardless of the version or configuration all modules will automatically be displayed in the edsp/edasp window once the ‘cf’ rou...

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