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PCE
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CPC Subgroup
H03F 9/04

voltage-controlled, i.e. the load current flowing in only one direction through a main coil, e.g. Logan circuits (H03F9/06 takes precedence)

Full Title

Magnetic amplifiers > voltage-controlled, i.e. the load current flowing in only one direction through a main coil, e.g. Logan circuits (H03F9/06 takes precedence)