Receiver for the 40m band LM602 (CB25305E)

This circuit uses an FM IF transformer for tuning. The circuit is from a Radio Electronics magazine from April 1990.

SIDAC Transient Protector (CB4242E)
The circuit presented was found in the ON Semiconductor manual. In it we have a way to protect the...
Peak Indicator (CB20736E)
This circuit triggers an LED when the input signal exceeds the peak, or the value set in RV1. The...
Voltage Tripler (CB25544E)
This circuit multiplies the input voltage by 3 and can work with up to 12 V input. The current is a few...