This schematic was drawn up by Phil – KJ6KE
An attenuator is an electronic device that reduces the power of a signal without appreciably distorting its waveform. (From Wikipedia)
This device is used during a t-hunt when the fox transmitter is close by and all the radio can hear from all angles is the beacon. The signal is diminished to a point where the directional antenna can be used again to find the hidden transmitter.