Wave filter has circuit board secured by soldering to inner wall of proximal end of bush, which has peripheral annular groove in which sealing ring between bush and cap fits under tension

摘要

The device has a circuit board (1) with electronic filter components with a connector (12) and conductor (13) at either end, a hollow cylindrical bush (2) with a threaded distal end that accommodates the circuit board connector and is sealed by a first isolating closure (23), a hollow cylindrical cap (3), a stepped second isolating closure (32) through which the circuit board conductor protrudes and a sealing ring (25) between the bush and cap. The circuit board is secured by soldering to the inner wall of the proximal end of the bush, which has a peripheral annular groove (24) in which the sealing ring fits under tension.