Depending on the components, given in the table, this circuit can amplify signals of 100 MHz or 400 MHz. The circuit is from a 80's documentation. Equivalent transistor can be used.
Using a 4046 PLL we found this circuit in the December 1989 issue of Radio Electronics magazine. The...
A modulated (intermittent) siren, using the four gates of integrated circuit 4001 is shown in...
This commercial clock circuit was found in the August 1976 issue of Radio Electronics magazine. The...