Интересная тема поднялась!

Есть у меня такая статейка по сабжу, если интересно могу прислать

THE ORIGINS OF THE PROXIMITY FUZE
Louis Brown

The basis of the fuze was an 80 MHz,
free-running Hartley oscillator with its output
connected between the body of the projectile
and a metal nose cone. The plate current was
connected through a low-pass filter to a two-stage
audio amplifier. The non-radio-frequency
component of this current changed
when an object entered the near-field of the
radiation pattern, and this change, which
contained the Doppler frequency describing
the relative motion of projectile and target,
was amplified and applied to a thyratron,
whose conduction exploded the shell. The
designer of the circuit was the New Zealand
born W.A.S. Butement, one of Britain's best
radar engineers.

Есть там и про батареи – сухие батареи быстро портились при хранении, перешли на кислотные аккумуляторы, где ампула с кислотой разбивалась при выстреле.

Dry cells deteriorated so rapidly in storage
that they were replaced with acid cells. In
these the acid was released from a glass
ampule that shattered on firing and was spun
into the electrodes.

А вот схемы к сожалению нет