• Country
• People's Republic of China

• Manufacturer / Brand
• Shenzen Kingstar Electronics Co., Ltd. (KNSTAR); Shenzhen

• Year
• 2015 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 333294

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

• Main principle
• DSP, Digital Signal Processor

• Wave bands
• Broadcast (BC) and FM or UHF.

• Power type and voltage
• Dry Batteries / AA: 2 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6.6 cm = 2.6 inch

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: KNSTAR FM/AM/TV Pocket Radio K-270 - Shenzen Kingstar Electronics

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

• Dimensions (WHD)
• 113 x 75 x 28 mm / 4.4 x 3 x 1.1 inch

• Notes

• Main specifications:

  • Receiver bands:
    • AM: 525 - 1610 kHz
    • FM: 76 - 108 MHz
      • Dial scale markings for TV VHF analog channels 2 to 5
  • Power ON LED indicator
  • 8 Ohm 0.5 Watt speaker
  • 3V DC IN power socket
  • 3.5mm earphone socket
  • Enclosure colors: Black, White

  Some technical details:

  The receiver is built around two integrated circuits, IC1 KT0936M-B9  Radio-on-a-Chip, and IC2 8002A Power Amplifier.

  The KT Micro KT0936M-B9 (SSOP16 package) DSP with integrated MCU and class AB Audio Amplifier, is a Radio-on-a-Chip solution, featuring FM (32 - 110 MHZ at 50 or 100 kHz stepping, 1.6uV @ (S+N)/N) 26dB), LW (150 - 520 kHZ at 1 kHz stepping, 16uV @ (S+N)/N) 20dB), MW (500 - 1750 kHz at 9 or 10 kHz stepping, 16uV @ (S+N)/N) 20dB), and SW (1.75 - 32 MHz at 5 kHz stepping, 13uV @ (S+N)/N) 20dB), running at a nominal 3VDC with a minimum of 2.1V and maximum of 3.6V, with a typical operating current of 28 mA. The audio amplifier is able to deliver 190 mVrms (typical) over a 32 Ohm load with a THD of 0.3%.

  The 8002A  (SOP8 package) is a 3 Watt over 3 Ohm load class AB Audio Power Amplifier, operation voltage of 2 to 6 VDC, and a shudown current of 0.6uA.

   

   

   

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

• Other Models

• Here you find 4 models, 3 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Shenzen Kingstar Electronics Co., Ltd. (KNSTAR); Shenzhen