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![]() L'RT242 era un ricevitore portatile supereterodina con 2 bande di frequenza: Onde Medie e Onde Corte, il circuito utilizzava 7 transistor al germanio prodotti dalla ATES: AF168, AF172, AF172, AC137, AC138, AC142, AC141 e due diodi al germanio: un AA121 in rivelazione e un TA210, un transistor al germanio la cui giunzione Base/Emitter veniva utilizzata come diodo per il controllo della polarizzazione (bias). Per la ricezione delle Onde Corte bisognava estrarre l'antenna a stilo mentre per le Onde Medie l'antenna era avvolta su un lungo nucleo di ferrite. Il mobiletto era in plastica tipo similpelle con scala parlante rotonda e maniglia per il trasporto. L'alimentazione era fornita da 4 batterie da 1,5 V tipo C (LR14 o UM2). Particolare interessante: all'interno del coperchio posteriore era incollato lo schema elettrico del ricevitore. © IK3HIA, 2004 |
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![]() The RT242 was a portable superheterodyne receiver with 2 frequency bands: Medium Waves and Short Waves, the circuit used 7 germanium transistors produced by ATES: AF168, AF172, AF172, AC137, AC138, AC142, AC141 and two germanium diodes: an AA121 in detection and a TA210, a germanium transistor whose Base/Emitter junction was used as a diode for polarization control (bias). For the reception of Short Waves it was necessary to extract the whip antenna while for Medium Waves the antenna was wound on a long ferrite core. The cabinet was made of imitation leather type plastic with a round dial and a handle for transport. The power supply was provided by 4 1.5 V type C batteries (LR14 or UM2). Interesting detail: the wiring diagram of the receiver was glued inside the back cover. © IK3HIA, 2004 |
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![]() *Circuit diagram |
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