This circuit is from Delco Radio found in a 1968’s documentation. The transistors are of the time and are not given information about the driver transformer. Note the high supply voltage.
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...