• Paese
• Cina (Repubblica Popolare Cinese)

• Produttore / Marca
• Dongguan Xinhuaide Electronic Commerce Co. (XHDATA); Dongguan

• Anno
• 2023 ?

• Categoria
• Radio (o sintonizzatore del dopoguerra WW2)

• Radiomuseum.org ID
• 349614

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

• Principio generale
• DSP, Processore di segnale digitale

• Gamme d'onda
• Onde medie (OM), lunghe (OL), piú di 2 gamme di onde corte (> 2 x OC) e MF (FM).

• Particolarità
• Disco fisso o memoria allo stato solido

• Tensioni di funzionamento
• Batterie / presa di alimentazione supplementare / Li-Ion 3.7 / USB 5 Volt

• Altoparlante
• Ø 4 cm = 1.6 inch

• Potenza d'uscita
• 2 W (max.)

• Materiali
• Plastica (non bachelite o catalina)

• Radiomuseum.org
• Modello: AM/FM/SW/LW World Band Radio D-109 - Dongguan Xinhuaide Electronic

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

• Dimensioni (LxAxP)
• 166 x 92 x 47 mm / 6.5 x 3.6 x 1.9 inch

• Annotazioni

• The XHDATA D-109 model is a portable world receiver that features a MP3 Player reading from a TF card or a wireless BT connection, wireless phone call answering, clock, sleep timer and alarms. Stereo is available on earphones for FM and media player.

  Main features

  • Radio
    • FM: 64 - 108 MHz, 76 - 108 MHz, 87 - 108 MHz, 87.5 - 108 MHz , selectable
      • 100 kHz steps fast tuning, 10 kHz slow tuning 
    • LW: 163 - 513 kHz
      • 9 kHz steps fast tuning, 1 kHz slow tuning 
    • MW:
      • 522 - 1620 kHz
        • 9 kHz steps fast tuning, 1 kHz slow tuning 
      • 520 - 1710 kHz
        • 10 kHz steps fast tuning, 1 kHz slow tuning 
    • SW: 1711 - 29999 kHz, continuous scan
      • 5 kHz steps fast tuning, 1 kHz slow tuning 
      • 14 bands (120 m to 11 m)
    • Noise limiting sensitivity
      • FM: 2 uV (30 dB S/N)
      • LW: 10 mV/m (26 dB S/N)
      • MW: 1 mV/m (26 dB S/N)
      • SW: 18 µV (26 dB S/N)
    • Selectivity: 60 dB all bands
    • AM Bandwidth: 1, 2, 3, 4, 6 kHz, selectable
    • Memory Presets: 600
    • Manual tuning, Direct entry, Auto, and ATS
    • RF signal strength, S/N, and temperature indicators
    • 3.5 mm FM / SW external antenna jack
  • Speaker: 40 mm dual NdFeB 16 core, 4 Ohm, 8 W (5 W on initial version)
  • 3.5 mm Stereo earphone jack. Use 16 to 32 Ohm impedance units.
  • TF card: Up to 32 GB
  • Bluetooth coverage: Up to 10 m
  • Audio playback format: MP3 / WMA / WAV / FLAC
  • Battery: 18650 Li-Ion, 3.7 V, 2000 mAh, rechargeable from dedicated USB-C port
  • Battery charger: DC 5 V, minimum 1000 mA, not included

  Brief technical description

  There are two PCB assemblies.

  The front sided PCB with ref. "20230218 D-109KS V1.0" contains the MCU/Display/KB and DSP receiver with an analog SW active filter. Initial PCB assy had a "20221212 D-109KS" reference (no version mentioned).

  The back sided PCB with ref. "20230517 D109-M V2.0" contains the Power Supply, Audio stages, and RF analog section (mostly SW). Initial PCB assy had a "20221208 D109-M" reference.

  The design is based on a Si4734-60 DSP (IC1) and a custom JTQ814F6B multimedia processor (U2), managed by a HC32L176 MCU (U1) hidden under a shielded cover, all located on the Front sided PCB. SW band filter is handled by 2SC3356-R25 NPN (Q2). A Buzzer for feedback info, a Microphone for wireless calls, a tuning encoder, and a TF slot are also installed, along with several active devices.

  On the back sided PCB a D4800 2-channel audio pre-amplifier (U1) drives a APA2068 2-channel audio power amp (U2) drives the built-in speaker in BTL-mode (Mono, L-channel) and drives the earphones in SE-mode (2-channels). A 4054B / LTH7B (IC7) and a  BRCL3130ME (IC3) manage the battery charging. A 6206A  LDO (IC1) handles the power supply regulation. The antenna RF signal is protected by a A7 (D2) pair of diodes; the front-end is handled by a 2SK2394-6(YJ6) N-FET (Q19) and a 2SC3356-R25 NPN (Q6) with help of some inductor/capacitance/resistor networks. Some additional active devices handles the switching control.

   

• Peso netto
• 0.289 kg / 0 lb 10.2 oz (0.637 lb)

• Autore
• Modello inviato da Jose Mesquita. Utilizzare "Proponi modifica" per inviare ulteriori dati.

• Altri modelli

• In questo link sono elencati 5 modelli, di cui 5 con immagini e 5 con schemi.
  Elenco delle radio e altri apparecchi della Dongguan Xinhuaide Electronic Commerce Co. (XHDATA); Dongguan