This audio mixer was found in an old American documentation. The potentiometers are 1M and the input capacitors are 100 nF. The circuit requires power supply voltages from12 to 18 V.
Static charges in objects Dan be detected by this sensitive electroscope. The meter indicates when the...
This simple field strength meter is from a transistor book from the 60's. The transistor is made...
The current drained by this circuit, from a 1976 documentation, is 3 mA and the cut-off frequency is...