This circuit is from a 60's documentation. The capacitance C1 can be between 20 pF and 0.01 uF depending on the generated frequency. Equivalent transistors may be employed.
This circuit was found in an English magazine from 1979. The magazine no longer exists, but the...
The arranjment sohon Bellow, and simulated in the Multisim Blue allows to see in the oscloscope...
We found this circuit in a European publication of the 1980s. The transistor could be the BC549. The...