Fig. 1
The pictures of the 400-MHz NB home-built 1H-31P double resonance solenoid probe. a The appearance of the probe. b The completed assembly without the probe cap. c The probe head with a cap which fully covers the scroll coil and minimizes the heat loss. d A copper blank for scroll coil coated with a Teflon tape. e The 5-mm inner diameter scroll coil tied up with the cable tie. f A side view of the scroll coil. The cable tie provided mechanical stability of the scroll coil with 5-mm inner diameter