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.

Low Distortion Sinusoidal Oscillator (CB14426E)
We found this circuit in a 1994 National Semiconductor technical documentation. The circuit can be...
Basic PLL (CB21757E)
In the figure we have a basic PLL circuit with the LM567 or equivalent. The circuit is from a 1977...
Single Cell Barometer (CB4913E)
This circuit was obtained from a Linear Technology manual from the 1990s. The sensor is of the...