LiJiANi AIR/VHF/FM/AM/SW/WB World band Radio RD239

Unknown - CUSTOM BUILT: China

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  • Year
  • 2023 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 356606

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

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • DSP, Digital Signal Processor
  • Wave bands
  • Broadcast, more than 2 SW bands plus FM or UHF.
  • Details
  • HD or solid state memory; Radio with other functions
  • Power type and voltage
  • Batteries / addl. power jack / Li-Ion 3.7 or AA: 3 x 1.5 / USB 5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 cm = 1.6 inch
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: LiJiANi AIR/VHF/FM/AM/SW/WB World band Radio RD239 - Unknown - CUSTOM BUILT: China
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 138 x 85 x 28 mm / 5.4 x 3.3 x 1.1 inch
  • Notes

  • The LiJiANi RD239 portable radio features BT 5.2, TF card player and recorder from radio, microphone or auxiliary input, clock and alarm, and sound equalizer. Two LED flashlights are also featured at the left side. The TF card can also be used to apply firmware updates, supplied by the manufacturer support team. The radio is also sold as Clooblut RD239.

    Main specifications

    • FM: 64 -108 / 76 - 108 / 87 - 108 / 87.5 - 108 MHz, selectable
    • AM: 520 - 1710 (10 Stepping) / 522 - 1620 (9 Stepping) kHz, selectable
    • SW: 3.20 - 29.99 MHz
    • VHF: 30.0 - 200 MHz
    • AIR: 118.0 - 138.0 MHz
    • WB: 162.400 - 162.550 MHz
    • 3.5 mm external antenna jack
    • 3.5 mm earphones
    • 3.5 mm auxiliary input
    • BT V5.2
    • TF Card: MP3/WAV/WMA, up to 256 GByte
    • Power Supply uses a dual battery system
      • Removable rechargeable Lithium BL-5C battery,
      • Or else 3 x "AA" dry batteries
    • USB-C port for
      • Charging the BL-5C battery (5V, 1A)
      • Connecting the radio to a computer to access the TF card

    Brief technical details

    There are at least two PCB assembly versions, a "2023.07.20 RD-239-A-V1.5" and a "20240122  RD-239-A-V1.61". This analysis covers the later version.

    The receiver uses a AKC6958 DSP (IC4) and a 2SC3356-R25. (Q1) in the RF front-end for the telescopic/external antenna used by all bands except for AM(MW). A LTK5802 audio power amplifier (IC1) drives the 4 Ohm, 3 Watt speaker. There is a down converter for the Air Band using two 2SC3356-R25 NPN RF transistors, one 2TY/S8550 PNP, and two RS2057 SPDT Analog Switches. A CXXC14B5C media player (IC3) manages the radio. Several devices handles the power supply and control functions, like a 4056A battery charger (IC5), a P14C1S over-voltage-protection (IC9), a TM74HC595 shift register (IC6),a  two XC6206P332MR/662K LDO regulators (IC7, IC8), a S8050/J3Y NPN (Q2), a SI2301 P-MOSFET (Q4), and two S9014/J6 NPN (Q5, Q6).

     

  • Net weight (2.2 lb = 1 kg)
  • 0.2 kg / 0 lb 7 oz (0.441 lb)
  • Author
  • Model page created by Jose Mesquita. See "Data change" for further contributors.

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The model LiJiANi AIR/VHF/FM/AM/SW/WB World band Radio is part of the collections of the following members.

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