• Country
• People's Republic of China

• Manufacturer / Brand
• Eonko Star Electronics Co. Ltd.; Shenzhen

• Year
• 2019 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 328312

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

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• DSP, Digital Signal Processor

• Wave bands
• Broadcast, Short Wave plus FM or UHF.

• Details
• HD or solid state memory

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

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 cm = 1.6 inch

• Power out
• 3 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: FM/AM/SW Multiband Radio MP3 Mini Speaker L-258 - Eonko Star Electronics Co. Ltd

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

• Dimensions (WHD)
• 128 x 83 x 29 mm / 5 x 3.3 x 1.1 inch

• Notes

• The EONKO L-258 portable radio features FM Stereo/MW/SW bands and an MP3 player on TF/USB cards. 

  Specifications

  • FM: 87.5 - 108.MHz
  • AM: 522 - 1710 kHz
  • SW: 2300 - 21950 kHz
  • Manual, direct entry, or automatic and store tuning
  • 99 memory presets per RF band
  • MP3 Player on TF/USB devices (8 - 320 kbps, S/N 87 dB)
  • 3.5mm headphone jack
  • 3.5mm auxiliary input jack
  • Power Supply:
    • Removable rechargeable BL-5C 1000mAh battery
    • Mini USB charger port (DC 5V, 500mA)

  Brief technical details

  The PCB reference is: AC1090-LCJ-258-V5.5 DATA 2021.01.06

  The radio uses a  KT0913 DSP FM Stereo/AM/SW DSP tuner (U5). KTMicro lists this chip as supporting SW, while the KT0913L-D4 does not. Two active front-end BPF stages, one with a J8/ S9018 NPN for FM (Q7) and another J8/ S9018 NPN for SW (Q6), share the telescopic antenna that is protected with a A7/ BAV99 diode set (Q5).

  A  MIX2018A audio power amplifier drives the internal 3 Ohm, 5 Watt, 4 cm speaker.

  An  AC21HHK836-90 Media Player (U2) and a  T24C08A 8Kbit flash memory (U1) manage the radio. The Power Supply and Control uses a 4057AN/ ME4057 battery charger (U6), a HX=JE/ PS3120A 5V output booster (U3), a J8/ S9018 NPN (Q3), and a J6/ S9014 NPN (Q4) NPN.

   

  This radio is also sold under other brands, such as the PRUNUS L-258 and Retekess TR603..

• Net weight (2.2 lb = 1 kg)
• 0.3 kg / 0 lb 10.6 oz (0.661 lb)

• Price in first year of sale
• 20.00 CAD

• Author
• Model page created by Serioja Tatu. See "Data change" for further contributors.

• Other Models

• Here you find 3 models, 3 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Eonko Star Electronics Co. Ltd.; Shenzhen