Tektronix 191 Details
TEKTRONIX 191 Constant Amplitude Signal Generator
R.F. signal generator (350kHz-100MHz). Hybrid circuit with both valves and transistors. The ‘constant amplitude just means that there's no provision for amplitude modulating the signal. In fact, these signal generators can be used as scope calibrators. Also used as an adaptor to plug into the GR874 connector to convert it into the rather more useful BNC socket.