HRO Prototype
National Company; Cambridge & Malden (MA)
- País
- Estados Unidos
- Fabricante / Marca
- National Company; Cambridge & Malden (MA)
- Año
- 1934/1934
- Categoría
- Receptor profesional (puede incluir bandas de aficionados)
- Radiomuseum.org ID
- 86412
-
- alternative name: National Toy Co.
- Brand: Thrillbox
1934 National Catalog No.240
1934 National Catalog No.240
National Catalog No. 240 from 1934
National Catalog No. 240 from 1934
National Catalog No. 240 from 1934
- Numero de valvulas
- 9
- Principio principal
- Superheterodino con paso previo de RF; ZF/IF 456 kHz; 2 Etapas de AF
- Número de circuitos sintonía
- 11 Circuíto(s) AM
- Gama de ondas
- OM y más de dos OC
- Tensión de funcionamiento
- Alimentado desde otro equipo o aparato principal. / 115 Volt
- Altavoz
- - Este modelo usa altavoz exterior (1 o más).
- Potencia de salida
- 1.5 W (unknown quality)
- Material
- Metálico
- de Radiomuseum.org
- Modelo: HRO [Prototype] - National Company; Cambridge &
- Forma
- Boatanchor (militar, profesional >20 kg).
- Ancho, altura, profundidad
- 440 x 220 x 300 mm / 17.3 x 8.7 x 11.8 inch
- Anotaciones
-
The National HRO (Prototype) was introduced in National's Catalog No. 240 from October 1934. It has a coverage from 1.7 - 30 MHz in four bands utilizing four ganged coil sets (1.7 - 4; 3.5 - 7.3; 7 - 14.4; and 14 - 30 MHz), which were supplied with the receiver. In addition, two coil sets, covering the broadcast band were available as accessories. Has the then new PW Micrometer Dial and rosette knobs. Receives AM/CW/SSB (BFO).
In Communications Receivers: The Vacuum Tube Era (4th edition), the author writes, "This model shown in advertisements in QST from Oct., 1934, thru Jan., 1935, had no RF Gain, BFO Pitch controls or 'S' meter switch. Round, unskirted knobs. Probably never shipped this model." The author gives no reason for this conclusion. However, this receiver appeared in a two page spread in the No.240 National Catalog from 1934-5.
- Peso neto
- 14.5 kg / 31 lb 15 oz (31.938 lb)
- Procedencia de los datos
- Communications Receivers
- Mencionado en
- National Catalog No. 240 - 1934
- Autor
- Modelo creado por Martin Bösch. Ver en "Modificar Ficha" los participantes posteriores.
- Otros modelos
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Donde encontrará 446 modelos, 285 con imágenes y 189 con esquemas.
Ir al listado general de National Company; Cambridge & Malden (MA)
Colecciones
El modelo es parte de las colecciones de los siguientes miembros.