The coils of this circuit will determine the transmission frequency of this device. The circuit is from the 1960 Mullard transistor reference manual and makes use of germanium transistors.
We found this circuit in a 1999 publication. All the components used are still common and the...
This circuit was found in a 1999 English magazine, but can be easily assembled with BC548...
We found this circuit in a 1977 technical documentation. The circuit can use a TIP31 for Q1 and a...