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A Super-Sensitive Long-Range Receiver
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PANEL VIEW OF THE SUPER-HETERODYNE RECEIVING SET
There is a separate rheostat provided for controlling the filament voltage of each tube
in the filament-lighting circuit or to the filament-lighting battery itself.
Further, it is frequently necessary to set an amplifier of this character on rubber cushions so that mechanical shocks due to movements within the room will not cause a "ringing" of the tube elements. Preferably, each tube should have its own individual shock absorber. This enables work upon the amplifier while in operation without great noise in the headphones due to handling units in the circuit.
The final touch to be given to the superheterodyne consists in adding to it a stage of tuned radio-frequency amplification. Of course this still further complicates tuning. The gain in signal strength is fairly well worth while, however, and the expedient will be adopted by all true experimenters. This arrangement is shown in Figure 5.
Having added this improvement, the user can be certain that he is in possession of the most sensitive radio receiver ever devised.
If You are Thinking
Of submitting an article to RADIO BROADCAST, you may save yourself and the editors time and trouble by 'considering the following notes as to what we want and what we cannot use:
WE WANT:
True accounts of the uses of radio in remote regions.
Short, true stories of adventures in which radio played an important part: unusual and interesting occurrences to you or your acquaintances.
Clear explanations of new or especially effective circuits or uses for apparatus.
Concise and logical discussion of some important problem or phase of radio, whether in the field of broadcasting, constructing, operating, buying or selling; or of reading or writing that has to do with radio.
True accounts, of some particular interest, relating "What Radio Has Done For Me."
Humor, when the object is not merely to appear funny, but to present some phase of radio in an attractive, amusing way. The same applies to drawings.
Clear, unusual photographs are always in order, as are good circuit diagrams.
A liberal rate is paid for material used.
WE CANNOT USE:
Fiction, unless it deals in a striking way with some subject of interest to those interested in radio. Articles or illustrations to which RADIO BROADCAST would not have the exclusive rights. The best way to do is to read through several numbers of the magazine to get an idea of the various kinds of articles we publish.