The serial coupling RAW consists of 3 single-phase coupling-transformers, the resonant circuit cabinet and the transmitter matching circuit. The coupling transformer works at mains frequency as a current transformer and for the audio frequency as a power transformer. The resonant circuit cabinet RK includes not only the resonant circuit but also isolation and protection devices. The transmitter tuning circuit consists of a pitch-matched longitudinal filter and the transmitter output transformer.
Preferably at very low sound frequencies
Suitable for indoor or outdoor installation