[ARC5] anyone know what it is?

[J. Forster]

> the magnetic field warning strongly suggests it contains a magnetron

Probably.

> The battery charging label suggests it was/is battery powered

Of course. The PPN-2s used small wet cells 70 years ago.

> The label- transponder- along with the two items above suggest this thing
> is a battery charged radar transponder used to indicate a specific ground
> position, a drop zone for example on the screen of an airborne radar.

Yes, as I said yesterday.

> Crude radar transponders where used in WWII on D-day IIRC as part of the
> parachute drop .

The PPN-1 and PPN-2 were by no means crude.

YMMV,

-John

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