The number of radio amateurs actually active on the various frequency bands allocated for their use is quite considerable. If one wants to maintain contacts with reasonable certainty and to achieve a high percentage of intelligibility, then it becomes necessary to dispose of a receiver offering quite particular features. In order to satisfy in a better way the requirements of radio amateur communication it is advantageous, therefore, that a receiver destined for this use, instead of having been derived from a project which had to oblige several different requirements, corresponds to it’s final destination which, after all, is: To receive exclusively the signals of radio amateurs on those frequency bands which are set aside for their use. It is evident, therefore, that equipping such a receiver with other frequency bands (e.g. the standard broadcasting band or the frequency bands locates between the radio amateur bands) could complicate the constructive solution and lead to the sacrifice of some particular advantage, which in consideration of the purpose of such a receiver does not seem to be justified. Derived from previous radio amateurs communication receivers produced by GELOSO, the G 209-R was designed with the intention of offering to transmitting amateurs a set of professional scope, designed to operate exclusively on the frequency bands allocated to their use. When constructing this receiver, certain features of primary importance were particulary considered; e.g., stability vs. time and accuracy of the calibration, sensitivity and signal-to-noise latio, the ability to clip amplitude modulated noise interference (noise limiting), the ability to choose the audio (beat) note at will (accomplished by means of a beat frequency oscillator operating at the intermediate frequency). In addition to that, this receiver is capable of receiving amplitude modulated signals and c.w. signals as well as single-side-band-sup-pressed-carrier (s.s.b.) signals. In the following chapter ail principal technical features are listed (with figures).