DK4097C -
Automatic Receiver for Morse code both by Single and Multiplex Telegraphy at intervals and at the same time Telegraphing in opposite directions.
- Google Patents
Automatic Receiver for Morse code both by Single and Multiplex Telegraphy at intervals and at the same time Telegraphing in opposite directions.
DK4097D
Automatic Receiver for Morse code both by Single and Multiplex Telegraphy at intervals and at the same time Telegraphing in opposite directions.
DK4097C
(en)
An automatic Morse telegraph receiver, also serving the same in simple telegraphy as for intermittent multiple telegraphy and in simultaneous telegraphy in opposite directions.