This circuit was found in a Popular Electronics of the 1980s. The microammeter may be the lowest current range of a multimeter. The antenna is telescopic.
Found in a 1982 Maplin magazine, this circuit can be changed to work on other frequencies. The response...
The values of the components of this Mullard (Philips) circuit depend on the desired voltages. The...
We find this circuit in an American documentation from the 80's. The circuit has the coil given by the...