The capacitor used in this circuit can have values between 5 and 30 uF. The circuit is of old documentation for radio amateurs. Observe the special source used in the supply.
The output transistors can be the TIP41 and the BD135 and BD136 drivers. TR1 can be a BC558 and...
This circuit for signals up to 30 MHz can improve your reception in the medium and short-wave...
The values of the capacitance between output A and ground can be programmed digitally in 18 steps...