• Country
• People's Republic of China

• Manufacturer / Brand
• Dongguan Xinhuaide Electronic Commerce Co. (XHDATA); Dongguan

• Year
• 2023 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 349614

Click on the schematic thumbnail to request the schematic as a free document.

• Main principle
• DSP, Digital Signal Processor

• Wave bands
• Broadcast, Long Wave, more than 2 x SW plus FM or UHF.

• Details
• HD or solid state memory

• Power type and voltage
• Batteries / addl. power jack / Li-Ion 3.7 / USB 5 Volt

• Loudspeaker
• Ø 4 cm = 1.6 inch

• Power out
• 2 W (max.)

• Material
• Plastics (no bakelite or catalin)

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

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 166 x 92 x 47 mm / 6.5 x 3.6 x 1.9 inch

• Notes

• 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.

   

• Net weight (2.2 lb = 1 kg)
• 0.289 kg / 0 lb 10.2 oz (0.637 lb)

• Author
• Model page created by Jose Mesquita. See "Data change" for further contributors.

• Other Models

• Here you find 5 models, 5 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Dongguan Xinhuaide Electronic Commerce Co. (XHDATA); Dongguan