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Majestic Ch= 180

Majestic Ch= 180; Grigsby-Grunow - (ID = 244694) Radio
 
Majestic Ch= 180; Grigsby-Grunow - (ID = 674740) Radio
 
Majestic Ch= 180; Grigsby-Grunow - (ID = 674741) Radio
 
Majestic Ch= 180; Grigsby-Grunow - (ID = 674742) Radio
 
Majestic Ch= 180; Grigsby-Grunow - (ID = 674747) Radio
 
Majestic Ch= 180; Grigsby-Grunow - (ID = 676635) Radio
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Majestic Ch= 180; Grigsby-Grunow - (ID = 244694) Radio
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País:  Estados Unidos
Fabricante / Marca:  Grigsby-Grunow (-Hinds) Co. (Majestic pre 1933); Chicago (IL)
Año: 1928 Categoría: Radio - o Sintonizador pasado WW2
Válvulas 9: 27 27 27 27 27 50 50 81 81
Principio principal RFS sin reacción; 3 Etapas de AF; Neutrodyne
Número de circuitos sintonía 4 Circuíto(s) AM
Gama de ondas OM (onda media) solamente
Especialidades
Tensión de funcionamiento Red: Corriente alterna (CA, Inglés = AC) / 90-130 Volt
Altavoz Altavoz electrodinámico (bobina de campo)
Potencia de salida
de Radiomuseum.org Modelo: Majestic Ch= 180 - Grigsby-Grunow -Hinds Co.
Material Metálico
Forma Chasis (tambien de autoradio)
Anotaciones

Push-pull af output stage; using the 8P6 or 8P3 power unit; chassis for Majestic model 181.

This radio is a cascade of 3 individual TRF stages, each with its own feedback coil forming a Wheatstone bridge acting as a Hazeltine neutralization for the triode (described as the RFL circuit in contemporary sources). The feedback polarity is reversed with respect to the signal polarity through the Cag Miller-capacitance, in effect neutralising the triode tendency to oscillate.

The antenna circuit has a separate tuning coil, to be readjusted with each tuned frequency.

The tuning scale is graduated with 2 scales: One in frequency from 550 to 1500 kHz and the other as a linear scale from 0 to 100. 

LF coupling between stages is done by transformers - Push-pull output.

The unit contains a separate 8P6 or 8P3 power supply unit with individual transformers for the filaments and the 425 Volt anode supply. A current regulator is included in the primary circuit of the power transformers to compensate for mains voltage changes between 90 and 130 Volt AC.

Ext. procedencia de los datos Ernst Erb
Referencia esquema Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
Documentación / Esquemas (1) Rider's Perpetual, Volume 2 = 1932 and before


Ir al listado general de Grigsby-Grunow (-Hinds) Co. (Majestic pre 1933); Chicago (IL)
Donde encontrará 200 modelos, 118 con imágenes y 156 con esquemas.



  
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