We have a BB probe which 'suddenly' ('next' time I was using it) got quite long
360/4 degree pulses. The 90 is long at high power (say tl0 12 dB), and goes
through a minimum at about 20 dB (where it is 70 us for 31P, was about 20
before, with 150 mM salt). I also tested the performance for 14N and the
tendency is the same - a minimum 90 at a lower power.
Obviously something has been done to the probe, but things works out ok with the
long pulses so I have not done anything about it yet.
73, Peter
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| Peter Lundberg Ph: (+46 90) 16 59 73 |
| Physical Chemistry Fax: (+46 90) 16 77 79 |
| U of Umea Email: PeterL@chem.umu.se |
| S-901 87 Umea Efax: PeterLundberg@f090167779.fax.sunet.se |
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