Found in documentation from 1924, this receiver has several sets of coils. Power is supplied by several batteries and listening on high-impedance headphones.
This high voltage source supplies at its output a voltage that is six times the value of the peak...
With an optical coupler and a power transistor, which can be the BD135, it is possible to control...
This circuit is activated by the ignition key which, when removed, makes a relay beep if the...