A small microwave total-power radiometer

A project that could be quite useful in the classroom or instructional laboratory is described. This radio telescope was built to provide a convenient method of demonstrating that the human body emits microwaves. The telescope also indicates that there is similar microwave emission from the Sun, the ground, and any fluorescent lights that happen to be within adequate proximity. The telescope was built using a surplus dish from a microwave test set, as well as (obsolete) satellite TV components.<>