This circuit was found in the January 1995 Electronics Now magazine. The source must be dual, and a noise pickup guard ring must be used.
This circuit was obtained from an American 80's documentation. The transistors can be 2N2222 and...
This low Power simple amplifier is intended to the use with high impedance phones. The circuit is...
This circuit was found in a 1963 magazine, but can still be easily assembled with some current...