Stereophonic Receiver 2216
Marantz (Sound United LLC); Vista, CA
- País
- Estados Unidos
- Fabricante / Marca
- Marantz (Sound United LLC); Vista, CA
- Año
- 1977 ??
- Categoría
- Radio - o Sintonizador pasado WW2
- Radiomuseum.org ID
- 209489
- Numero de transistores
- Hay semiconductores.
- Semiconductores
- Principio principal
- Superheterodino en general
- Gama de ondas
- OM y FM
- Tensión de funcionamiento
- Red: Corriente alterna (CA, Inglés = AC) / 220 Volt
- Altavoz
- - Este modelo usa altavoz exterior (1 o más).
- Potencia de salida
- 32 W (unknown quality)
- Material
- Metálico
- de Radiomuseum.org
- Modelo: Stereophonic Receiver 2216 - Marantz Sound United LLC;
- Forma
- Unidad para estanteria.
- Ancho, altura, profundidad
- 440 x 137 x 293 mm / 17.3 x 5.4 x 11.5 inch
- Anotaciones
- Am/FM Stereo Receiver, 2x 16 Watt.
Inputs: Tape, Phono MM, Aux.
FM muting, High filter, Bass and Treble Control, Tuning Meter.
- Peso neto
- 12 kg / 26 lb 6.9 oz (26.432 lb)
- Precio durante el primer año
- 240.00 $
- Autor
- Modelo creado por Franz Scharner. Ver en "Modificar Ficha" los participantes posteriores.
- Otros modelos
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Contribuciones en el Foro acerca de este modelo: Marantz Sound United: Stereophonic Receiver 2216
Hilos: 1 | Mensajes: 5
I have just rebuilt a Marantz 2216 receiver. After the rebuild I noted the receiver's FM reception sounded 'bright'.
The FM stereo demodulator is a Hitachi HA1156W, for which I found the original datasheet and application notes online. The recommended de-emphasis is achieved by loading the channel outputs with a resistor and capacitor in parallel shunted to audio reference (i.e. the (+) or (-) rail).
For for 50μS the recommended load is 3k9Ω in parallel with 0.012μF, as shown in the application notes.
For some unnknown reason Marantz used 0.0039μF capacitors in the 2216 deemphasis circuit, which produces a time constant of 15μS, not the 50μS required for most countries or the 75μS for USA. This results in a rising frequency response and bright sound.
Not having any 0.012μF capacitors to hand, I shunted C311 & C312 with 0.0082μF capacitors on the underside of the circuit board. This corrects the high frequency response.
John Matheson, 27.Mar.21