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The MA 101 unit
consists of a constantly active magnetic, bi-polar component, an acoustic
component, a nine-place P.D.M. and a galvanic P.S.E. Its operation differs
from that of the MA 1 in that the P.D.M. "blind" actuations are run off by
actuation of both the acoustic and the magnetic components together rather
than by actuation of the magnetic component alone; i.e., when the magnetic
component is actuated, it immedia-tely put the acustic component in the
circuit, and when sound impinges on the micro-phone, he P.D.M. advances one
step. If acoustic actuation does not occur within 40 seconds after magnetic
actuation, the "T" switch returns the entire unit to normal as an MA 1.
Excessive moisture or humidity in the unit will operate a glavanic P.S.E.
and fire the detonator after a short delay. |
