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  ABDNP200172a01.JPG - Warden, Muirhead & Clark Morse Receiver Tune in to the right parts of the short wave radio bands and you will hear Morse code beeping away.  Beeping morse is a twentieth century development, a product of the electronic age.  A Morse key doesn't beep; it clatters away.  Likewise in the pre-electronic era the audio receiver clattered away.  The signal (sometimes via a relay) activated the clattering receiver, attracting its metal bar towards a metal stop.  The receiver's clattering mimicked that of the sending key and hence the experienced sender would have no difficulty interpreting the clattering receiver. ABDNP:200172a  
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15 | Warden, Muirhead & Clark Morse Receiver

Tune in to the right parts of the short wave radio bands and you will hear Morse code beeping away. Beeping morse is a twentieth century development, a product of the electronic age. A Morse key doesn't beep; it clatters away. Likewise in the pre-electronic era the audio receiver clattered away. The signal (sometimes via a relay) activated the clattering receiver, attracting its metal bar towards a metal stop. The receiver's clattering mimicked that of the sending key and hence the experienced sender would have no difficulty interpreting the clattering receiver.

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