This circuit was obtained from HAM Radio magazine in an 80's issue. The FETs are types of the time and the frequency is determined by the crystal. The circuit operates at voltages from 3 to 9 V.
This circuit was obtained from an Electronics World magazine from 1992. The circuit provides an...
This other high stability thermocouple amplifier uses an 80's operating. The circuit can be used...
We found this circuit in a 1975 radio amateur documentation. The circuit uses TTL technology and...