RP647

• Paese
• Germania

• Produttore / Marca
• Siemens (& Halske, -Schuckert Werke SSW, Electrogeräte); Berlin, München

• Anno
• 1992 ?

• Categoria
• Radio (o sintonizzatore del dopoguerra WW2)

• Radiomuseum.org ID
• 128682

• Immagini
• Schemi

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• Numero di transistor
• 44

• Semiconduttori
• 2SK212 TA7358 TA7758 TA8126 AN7117 AN7117 AN7415 SVC201 SVC201 KV1236 KV1236

• Principio generale
• PLL, Phase-locked loop; ZF/IF 450/10700 kHz

• Gamme d'onda
• Onde medie (OM), corte (OC) e FM.

• Tensioni di funzionamento
• Batterie / presa di alimentazione supplementare / 4 × AA 1,5 / 6 Volt

• Altoparlante
• AP magnetodinamico (magnete permanente e bobina mobile) / Ø 6.5 cm = 2.6 inch

• Materiali
• Plastica (non bachelite o catalina)

• Radiomuseum.org
• Modello: RP647 - Siemens & Halske, -Schuckert

• Forma
• Tascabile (portatile molto piccola), < 20 cm

• Dimensioni (LxAxP)
• 170 x 112 x 38 mm / 6.7 x 4.4 x 1.5 inch

• Annotazioni

• Travel receiver with PLL synthesizer tuner, featuring FM Stereo on headphones (87.5 - 108 MHz), MW (531 - 1602 kHz), KW1/SW1 (3.2 - 7.3 MHz, KW2/SW2 (9.5 - 21.75 MHz), tuning channel steps of 5 kHz on SW1 and SW2, 9 kHz on MW, 50 kHz on FM, 20 station presets, clock / timer.

  The identical Sangean ATS-800 and Realistic DX-370 models share the same chassis, with slight variations, like different buttom colors or RF band coverage/channel stepping for specific markets.

  Technical details:

  The FM band uses a dedicated TA7358AP FM front end tuner IC (IC1) that passes the 10.70 MHz IF signal to a TA7758P AM/IF IF IC (IC2) followed by a AN7415S Stereo Multiplexer Demodulator.

  The MW and SW1/2 bands use a discrete RF Amplifier around a 2SK212E N-Channel JFET transistor (Q2), and then the RF signal is passed to the shared TA7758P AM Mixer/Osc and IF IC (IC2) using a frequency of 450 kHz.

  The VT tuning voltage is handled by a TA8126F DC-DC Converter and associated transformer encapsulated in a metalic shielding to prevent noise interference. Two SVC201SP varicaps (D1 and D2) are used on FM RF and Oscillator sections, and two KV1236Z-3 varicaps (D3 and D4) on the AM RF and Oscillator sections.

  The dual channel audio output is serverd by two AN7117 Low Power Consumption 1 W Audio Power Amplifiers (IC4 and IC5).

  The radio management, clock, and PLL functions are handled by a uPD1715G Microcontroller (IC101) and several discrete transistors and three auxiliary ICs. Several firmware versions were released during the production years for Siemens, like the uPD1715G-201 and uPD1715G-214 for the G4, and the uPD1715G-633-21 for the G4II.

• Peso netto
• 0.4 kg / 0 lb 14.1 oz (0.881 lb)

• Fonte dei dati
• -- Original prospect or advert

• Autore
• Modello inviato da Martin Bösch. Utilizzare "Proponi modifica" per inviare ulteriori dati.

• Altri modelli

• In questo link sono elencati 2514 modelli, di cui 2111 con immagini e 1325 con schemi.
  Elenco delle radio e altri apparecchi della Siemens (& Halske, -Schuckert Werke SSW, Electrogeräte); Berlin, München