MARCONI DIRECTION FINDER TYPE 542/552

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ABOVE IS THE MARCONI 542/552 D.F INSTALLATION. THE RECEIVER CONSISTED OF THREE STAGES AND IT HAD A FRAME ANTENNA ROTATED BY HAND. THE COVERAGE WAS FROM 125-225 METRES AND FROM 600-1030 METRES.ROTATING THE HAND WHEEL ( FRAME ANTENNA ) PRODUCED TO ZERO POSITIONS OF SIGNAL, INDICATING THE BEARING LINE.

 

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