This 1924 receiver uses a battery for the tube filaments and a high voltage battery for the amplifier and detector circuit. The speaker is kind of high impedance era.
We found this circuit in a Popular Electronics of the 90s. The circuit can be easily mounted...
This converter has coils according to the reception and converted frequency bands. We found it in...
In this 1970s receiver, the coil has a primary with 100 turns and a secondary with 20 turns, both...