HRO-5A1

National Company; Cambridge & Malden (MA)

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  • Anno
  • 1946/1947
  • Categoria
  • Ricevitore professionale (può includere bande amatoriali)
  • Radiomuseum.org ID
  • 49569
    • alternative name: National Toy Co.
    • Brand: Thrillbox

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 Specifiche tecniche

  • Numero di tubi
  • 11
  • Principio generale
  • Supereterodina con stadio RF; ZF/IF 456 kHz; 2 Stadi BF
  • N. di circuiti accordati
  • 11 Circuiti Mod. Amp. (AM)
  • Gamme d'onda
  • Onde medie (OM), lunghe (OL) e più di 2 gamme di onde corte (>2 x OC).
  • Tensioni di funzionamento
  • Fornita mediante altra unità o unità principale. / AC 6.3 & DC 240 Volt
  • Altoparlante
  • - Questo apparecchio richiede altoparlante/i esterno/i.
  • Potenza d'uscita
  • 1.5 W (qualità ignota)
  • Materiali
  • Mobile di metallo
  • Radiomuseum.org
  • Modello: HRO-5A1 - National Company; Cambridge &
  • Forma
  • Boatanchor (pesante apparecchio militare o commerciale, > 20 kg)
  • Dimensioni (LxAxP)
  • 440 x 220 x 300 mm / 17.3 x 8.7 x 11.8 inch
  • Annotazioni

  • Coverage : 1.7 – 30 MHz ( 4 standard ganged coil sets for 1.7 – 4, 3.5 – 7.3, 7 – 14.4, 14 – 30 MHz included, 2 coil sets for broadcast immediately available at extra cost, 7 more coil sets Additional coils (50-100, 100-200, 180-430, 480-960 and 900-2050 kHz) sold later including long waves and up to VHF ( total spectrum covered from 50 kHz to 54 MHz ).

    Modes AM / CW/SSB (BFO).

    The 0 – 500 epicyclic readout dial allows for continuous analog tuning while digitally indicating incremental progress over a range of ten full turns of the large tuning knob that tunes with velvet smoothness. Ten times the circumference of the dial is nearly 4 meters on a normal dial scale, which delivers great frequency resolution. The dial is not calibrated to directly indicate a frequency but a frequency calibration chart is necessary to determine the correct operation frequency.

    The latest HRO model (Var. 6) was sold as HRO-5A1, all knobs with metal skirts (selectivity control in right upper corner and new noise limiter control left of main dial both also with metal skirt), round metal labels around AVC and B+ switches, black micrometer dial and rectangular S-meter, S-meter toggle switch; printed metal calibration charts on coilsets. Rectangular IF filter shielding cans.

    External "dog house" type power supply : PSU 697 (filaments 6.3 V AC, B+ 240 V DC) used as standard.

  • Peso netto
  • 14.5 kg / 31 lb 15 oz (31.938 lb)
  • Prezzo nel primo anno
  • 274.00 $
  • Fonte esterna dei dati
  • Ernst Erb
  • Riferimenti schemi
  • Rider's Perpetual, Volume 17 = 1948 and before

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