This amplifier is from Motorola documentation from the 70s. The circuit uses transistors from the time, which are not common today, such as the SE7005 or 2N3916 at the output.
Found in a Popular Electronics from the 90s, this circuit uses a double 555 to emit beeps when the...
This circuit was obtained from National Semiconductor documentation from the 1990s. The circuit has a...
This RF monitor or field strength meter can use instruments from 100 uA to 1 mA full scale. The...