RECEPTORES
DO PERÍODO 1920 - 1924 RADIO RECEIVERS 1920 - 1924 |
Homebrew radio receiver assembled with odd parts or as in kit form circa 1924. The radio set’s three tuned radio frequency stages wiring is displaced on a wooden made breadboard interlinking the electrical components as fixed capacitors, resistors, inter-stages transformers, coils and a triode valve, (tube) lineup types, RCA UX, UV-201 A, De Forest DV-3, fixed in sockets, for the R.F. and audio frequency stages. In the radio ‘s large front panel laminated in black phenolic resin are the variable capacitors provided with the micrometer dials each, for tuning purpose, the rheostats for the valves (tubes) proper voltage setting and the earphone input jack. A sub-stage panel is fixed on the back of the wooden made breadboard for supporting the binding posts for antenna, ground, external A and B batteries connections since the latter are mandatory for the suitable (tube) valves’ voltages supply Vista anterior do receptor mostrando o tabuleiro de madeira onde estão dispostos os componentes como capacitores, resistências, transformadores inter-estágios, bobinas, e os soquetes com as respectivas válvulas e o subpainel com os respectivos bornes para conexões externas. The rear view of the receiver showing the wooden made breadboard supporting the electrical components as capacitors, resistors, inter-stages transformers, coils and the (tubes) valves already fixed in the sockets as well as the sub-stage panel provided with the binding posts for several external connections.
Propaganda publicada na revista Rádio, edição de agosto de 1924, Rio de Janeiro, sobre componentes para a construção de rádio receptores moldados em resina fenólica e fabricados pela empresa American Hard Rubber Company, EUA, representada no Brasil por “Alberto Pizarro Jacobina”. O receptor caseiro ora ilustrado foi construído usando componentes como painéis, soquetes de válvulas e knobs desta procedência. Obs.: Vide nota sobre propriedade intelectual na pagina frontal deste portal.
Advertisement published in the magazine “Radio, August 1924 edition, Rio de Janeiro on radio components and parts molded in Phenolic resin originally made by American Hard Rubber Company, USA, represented in Brazil by “Alberto Pizarro Jacobina”. The illustrated homebrew receiver used several parts such as panels, valve (tube) sockets as well as micrometer dials from this radio parts’ supplier. Obs.: Please see note on intellectual property in this website front-page.
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