Abstract: A wire section (1) inserted into a patient includes a wire (4) connected with a snare (3) at the front end thereof, and an outer tube (8) which retractably passes the wire (4) and the snare (3) therein. A remote control section (2) not inserted into the patient's body includes a bar-like main body (9) with a hollow inside; an operating member (11) connected to the main body (9) so as to be slidable in L and R direction and sled to enter or exit the snare (3) into and from the outer tube (8); and a pinching mechanism (15) built in the main body (9) and connected to the operating member (11) for detachably pinching the pipe (6) connected to the rear end of the wire (4). The wire section (1) and the remote control section (2) are connected when the pipe (6) is pinched by the pinching mechanism (15), and the wire section (1) and the remote control section (2) are separated when the pipe (6) is released from the pinching mechanism (15).

Abstract: The present invention relates to a tuning aid system for manually operated vacuum tube type RF power amplifiers. The tuning sequence is simplified by providing a visual indication of a region where the plate current and grid current of the vacuum tube indicate that the amplifier is properly tuned. In particular, the plate current and grid current of the vacuum tube are monitored and the readings thereof are coordinated by means of a visual display which indicates when the amplifier is properly tuned. In an aspect of the invention, the visual display also includes directions for modifying the level of the plate current and/or grid current on either side of the tuned region.