This 50 W amplifier was found in the November 1983 Radio Electronics issue. The circuit is suitable for the case and includes a preamp with tone control using off-the-shelf components.
We found this interesting timer circuit or CMOS timer in a 1988 publication. The circuit is still...
This circuit can be powered by 2 or 3 small batteries. The resistor can have values between 220...
Found in a magazine 73 for radio amateurs, this circuit operates in the 144 MHz band, at a...