• País
• Republica Popular China

• Fabricante / Marca
• Dongguan Xinhuaide Electronic Commerce Co. (XHDATA); Dongguan

• Año
• 2024 ?

• Categoría
• Radio - o Sintonizador pasado WW2

• Radiomuseum.org ID
• 356457

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• Numero de transistores
• Hay semiconductores.

• Semiconductores

• Principio principal
• DSP, Digital Signal Processor

• Tensión de funcionamiento
• Pilas / AA: 2 x 1.5 Volt

• Altavoz
• Altavoz dinámico (de imán permanente) / Ø 5 cm = 2 inch

• Material
• Plástico moderno (Nunca bakelita o catalina)

• de Radiomuseum.org
• Modelo: XHDATA FM1-2/MW/SW 4 BANDS RADIO D-220 - Dongguan Xinhuaide Electronic

• Forma
• Portátil de bolsillo , menor de 20cm.

• Ancho, altura, profundidad
• 72 x 125 x 28 mm / 2.8 x 4.9 x 1.1 inch

• Anotaciones

• The XHDATA D-220 pocket radio was released in three colors (yellow, green, black), features FM Mono, MW(AM), and SW bands. 

  Main specifications

  • FM1: 87 - 108 MHz
  • FM2: 64 - 108 MHz
  • MW: Frequency 520 - 1730 kHz (10 kHz steps) and 522 - 1728 kHz (9 kHz steps)
  • SW: 5.6 - 22-0 MHz
  • Earphone socket
  • Kickstand

  Brief technical details

  PCB assembly reference: D-220V1.1 20240510

  The radio uses an unmarked DSP chip (U2) but likely it is a  Si4825A10 DSP tuner, as it use the same pinout. The RF front-end uses two 2SC3356-R25 NPN RF transistors and dedicated BPFs, where (Q1) serves the SW and (Q2) serves the FM band. The MW magnetic antenna is connected passively to the DSP thru the mechanical band selector switch. 

  The telescopic antenna feeding the common input for the FM/SW RF front-ends is protected by a A7/BAV99 diode set (D1). Some initial production batches, despite using the same PCB revision, do not have this diode installed.

  A D2822M audio power amplifier (U1) drives the speaker.

  See the previous D-219 portable model that uses the same chipset, but featuring nine SW bandspreads.

• Autor
• Modelo creado por Jose Mesquita. Ver en "Modificar Ficha" los participantes posteriores.

• Otros modelos

• Donde encontrará 5 modelos, 5 con imágenes y 5 con esquemas.
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