Efficiency and signal/noise ratio of short linear dipoles

The performance of inductively loaded dipoles as a function of coil loading position can be expressed either in terms of their efficiency or power gain, or alternatively in terms of their signal/noise ratio for different sky temperatures. The variation of power gain and efficiency with loading position differs from the corresponding variation of signal/noise ratio, and graphs illustrating the relation between signal/noise ratio and efficiency for any short dipole are provided for different sky temperatures.