This 100 MHz bridge circuit was found in an American 1970s documentation. The supply voltages are not indicated, nor are the tubes.
We found this circuit in an old Mullard (Philips) documentation. The sensor consists of a...
This simple circuit, powered by 4 batteries or 9 V battery, brings together several functions of...
This circuit was found in an American documentation from 1977. The mechanical resonator or ceramic...