OCR Text |
Show Shunting Waves of Bothersome Neighbor The owner of a receiving set was bothered by a neighbor who broadcast broad-cast on 20 meters, but owing to close proximity, would overlap 360 meter waves. A solution of the matter mat-ter was worked out, as shown on diagram. dia-gram. The principle is to shunt him out Take for example a 3G0 meter broadcast. broad-cast. Everything is going along beautifully, when buzz-buzz, etc., comes in to spoil it all. He is sending on a 20 meter wave length, but, due to close proximity, he overlaps the length. This Is overcome by tapping off from the antenna to a single circuit tuner consisting of a variable con- w g g (fli Hi -"V n jM 1 Auxiliary Tuner Shunts Interference. denser and tapped Inductance coll In series. This is run to the plate side of the phone condenser. From the other side of the fixed receiver condenser con-denser you run to ground. When this auxiliary tuner Is tuned to his wave length, the vibrations he Is sending will travel over the shunt circuit to the ground, and as they are not audibly transformed in the detector de-tector bulb you will not hear them. Under certain conditions and with proper auxiliary tuner, static can b' eliminated. |