Abstract :
A transformer-type attenuator is described which is designed to operate at 10.7 Mc/s. It can be substituted for the potentiometer of a commercial high-speed level recorder, no modifications to the recorder itself being necessary. A method of recording field strength is described, using the attenuator and level recorder with a receiver having an intermediate frequency of 10.7 Mc/s. The same apparatus could be adapted to control counters indicating the times during which the field strength exceeds specified levels.
