This circuit is used in VHF and UHF superheterodyne receivers. The circuit is from the 1964 RCA transistors manual. Equivalent transistors such as the BF495 can be used.
This circuit is suitable for testing motor starting capacitors. Capacitors from 2 to 8 uF are...
The circuit shown is from an old English publication from 1965. We can adapt the circuit to work...
This circuit, from a 1978 publication, can be made with more modern transistors such as the TIP42,...