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 voltage doubler is indicated for applications where a voltage equal to twice that applied at the...
This interesting circuit found in a European publication from the 1990s eliminates the voice that...
Obtained in a 1969 Ferranti documentation, this circuit dissipates only 2.2 mW with 4.5 V. The...