Show THE BOTTLE regenerative RECEIVER 6 8 acer y amund gmund 1 a a I 1 I 1 A C V to ToA A baTTery the complete V T regenerative dottle dottie set it can be constructed by amateurs to make this set procure a wooden base two inches thick by six inches wide and of sufficient length to all the instruments 40 the variable condenser Is composed of two bottles one slightly smaller in diameter tl an the other cut the bottom off the larger of the two and coat the inside with tin tinfoil foil coat the outside of the smaller bottle with tin foil and at equal distances around the bottle paste four strips of waxed paper to keep the two sheets of tin foil from touching each oti er the smaller bottle Is mounted by drilling a hole through the base and sealing the neck of the bottle in it with lating compound the larger bottle Is slipped over this and Is raised and lowered by means of a cord fastened to its neck the upper end of which passes over a roller in the top of the cabinet at the end of the roller Is fastened a knob and dial and by turn ing this the capacity of the condenser Is varied the stator of the vario varlo coupler Is composed of a bottle from which the bottom has been cut off it Is fastened in the base the same as the smaller bottle of the variable condenser the rotor Is a section cut off a smaller bottle which will just rotate within the stator holes are drilled in the sides of the stator and roto rotor in such a position that a rod can be passed through them which Is used to turn the rotor the rheostat Is composed of a sec see about one inch long cut from the same bottle as the rotor of the varlo vario coupler this Is wound with resist ance wire as Is shown in the diagram cut a circular piece of wood which just fits inside the rheostat in the center of this bore a hole and pass a rod through it which carries an arm making contact with the resistance wire this rod also passes through the panel and carries on the end a knob and pointer the instruments are mounted in a cabinet the front of which Is made of a piece of window glass drilled for the various switches etc A switch Is used to vary the amount of inductance in the primary of the coaplen cou plen in the upper right hand comer corner of the cabinet Is fastened a small box that contains the B battery which la Is controlled by a switch mounted on the panel besides the instruments above described a vacuum tube a socket and two fixed condensers are used in the circuit the hook book up Is also given herewith 0 science and invention and radio news |