The primary function of the compensation network NFCN 9734 is to provide a serial compensation of the inductance of Helmholtz coils (e.g. the HHS 5206-16, HHS 5204-12, HHS 5202-9). Thus the currents needed to produce the desired field strength can be achieved using relatively low voltages.

An integrated shunt allows measuring the coil current and serves as a minimum load for the power amplifier. 

The compensation network NFCN 9734 consists of a series circuit of a variable capacitor and a fuse. Its purpose is to compensate the inductance of the Helmholtz coils HHS 5206-16 at operating frequencies of about 200 Hz up to 200 kHz. If no compensation is necessary, the signal is looped through.

There are 24 different capacitors and short available. They are connected between “Power Amplifier” and “Coil (to A)” utilizing relays. 

 Specifications:     

  The following graph shows the maximum reachable magnetic field strength of the system (HHS 5206-16, LFPA 9733 and NFCN 9734) – in relation to common standards.