This amplifier is from the Philips Databook of 1990. The circuit is suitable for automotive use and has the characteristics given in the table below the diagram.
TTL square signals can be divided by 10 using this circuit. The maximum frequency depends on the...
This crystal shortwave radio can tune signals up to the VHF range of analog TV (which no longer...
This circuit, obtained from a 1965 magazine, can still be assembled using some modern equivalent...