• Country
• People's Republic of China

• Manufacturer / Brand
• Unknown - CUSTOM BUILT: China

• Year
• 2019 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 334589

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

• Number of Transistors
• 3

• Semiconductors

• Main principle
• DSP, Digital Signal Processor

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

• Power type and voltage
• Batteries / addl. power jack / AA: 2 x 1.5 / 3 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5.7 cm = 2.2 inch

• Power out
• 0.1 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: CMiK 9-Band World Receiver KK-9 - Unknown - CUSTOM BUILT: China

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

• Dimensions (WHD)
• 130 x 78 x 29 mm / 5.1 x 3.1 x 1.1 inch

• Notes

• This is a DSP version of the popular analog KK-9 Chinese model previously seen on several brands where the CD2003 analog radio IC is used.

  This CMiK KK-9 unit, using a PCB marked as "KK-9/A 2019.7.8", features the KT0936MB9 DSP radio chip (IC2 in the PCB) configured to run without an additional custom setup EEPROM.

  Unlike so many DSP designs, this implementation does not use the soft mute option, resulting in an analog like behavior when scanning radio signals.

  The design is pretty much based on the Micro KT0936MB9) published white paper. The FM and MW bands are handled directly by the DSP chip, while the SW signals are first passed thru a S9018 transistor front-end (Q3 marked as J8). The built-in paper cone 8 Ω 0.5 Watt speaker is driven by a 8002A class AB power amplifier (IC1). Two additional transistors (Q1, Q2) are used in the keyboard/dial scale PCB to drive the AM/FM band indicator LEDs.

  The fake DX/Local switch is also used here, as seen before in so many other KK-9 variants.The slider switch misses the metallic contacts, and the two switch poles in the PCB are disconnected.

• Net weight (2.2 lb = 1 kg)
• 0.150 kg / 0 lb 5.3 oz (0.33 lb)

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

• Other Models

• Here you find 528 models, 507 with images and 29 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Unknown - CUSTOM BUILT: China