Beauty Little Shortwave King ( 小短波王 ) BB9701

Unknown - CUSTOM BUILT: China

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  • Year
  • 2000 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 333295

 Technical Specifications

  • Number of Transistors
  • 3
  • Semiconductors
  • Main principle
  • Superheterodyne (common); ZF/IF 455/10700 kHz
  • Wave bands
  • Broadcast, more than 2 SW bands plus FM or UHF.
  • Power type and voltage
  • Dry Batteries / AA: 2 x 1.5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: Beauty Little Shortwave King BB9701 - Unknown - CUSTOM BUILT: China
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 115 x 75 x 29 mm / 4.5 x 3 x 1.1 inch
  • Notes

  • This Beauty FM/AM/SW pocket receiver model BB9701 is a Chinese custom design inspired by the Tecsun R9701, like several others did, such as the Kchibo KK-9701, Kchibo KK-9803, Kipo KB408AC, and ECB 9701.

    The "Little Shortwave King (小 短波 王)" inscription on the front of the case was originally attributed to the Tecsun R-9701 world pocket radio which was a more complex design with double conversion and crystal-based local oscillator on the SW bands. However, on this "Beauty" custom design single conversion is used, despite sharing a similar single-chip with a transistor front-end concept.

    Main specifications

    • Frequency coverage
      • AM: 530 - 1600 kHz
      • FM: 88 - 108 MHz
      • SW: 6.94 - 22.20 MHz on 7 bands (49, 41, 31, 25, 21, 19, 16 m)
    • Tuning indicator
    • Band select indicator
    • 3.5mm Mono earphone socket
    • DC IN 3V socket
    • Volume with Power Off/On knob
    • Lock switch (band selection buttons are disabled when in Lock position)

    Some technical details

    This custom model is built around the Samsung S1A0426C02-S0 28-pin SMD One-Chip-Radio, similar to CXA1691, CD1691CB, or KA22426D (Samsung also made the S1A0426C02-A0 30-pin SDIP). Two IFT transformers (IFT1, IFT2) and two ceramic filters (CF1, CF2) handle the AM and FM IF signals.

    A RF Front-End based on a single S9018 silicon transistor (Q1) in common-emitter setup is used to amplify the AM and FM signals. The output FM signal is passed through a BPF (L1, C3)  to the Samsung radio chip. The output AM signal is tuned using a combination of the ferrite antenna and a set of ceramic capacitors (no dedicated SW tuning coils in this design), and the Samsung chip local oscillator uses a set of four coils (Osc1, Osc2, Osc3, Osc4) shared between the eight AM bands.

    The band select circuit is based on a flip-flop designed around two S9014 transistors (Q2, Q3).

     

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

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The model Beauty Little Shortwave King ( 小短波王 ) is part of the collections of the following members.

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