The utility model relates to an impulse generator technical field refers in particular to a reciprocal formula non inductive resistance of little volume of multilayer, including a resistance insulation section of thick bamboo and resistance wire, resistance insulation section of thick bamboo tip is equipped with inductance adjustment district, is equipped with resistance wire winding groove and resistance transposition groove on the resistance insulation section of thick bamboo, and the resistance wire cooperation is twined in resistance wire winding groove and resistance transposition inslot. The utility model discloses inside mainly being applied to closed compact impact device, it can gaseously be surrounded by high insulating, therefore the interval in resistance groove can be very little, resistance adopts multilayer coiling structure, make full use of the insulating cylinder space, reduced the whole length of resistance, install the dead ring between every layer resistance silk, ensure every layer of dielectric strength within a definite time, the resistance coiling uses the resistance groove as the even number, every layer resistance around to on the contrary, adjacent resistance cake around to on the contrary to reserve certain adjustment groove, adjust the inductance that appears in the resistance coiling, make the residual inductance near minimum.