HRO-M-RR

National Company; Cambridge & Malden (MA)

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  • Anno
  • 1944/1945
  • Categoria
  • Ricevitore professionale (può includere bande amatoriali)
  • Radiomuseum.org ID
  • 49576
    • alternative name: National Toy Co.
    • Brand: Thrillbox

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 Specifiche tecniche

  • Numero di tubi
  • 9
  • 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-M-RR - National Company; Cambridge &
  • Forma
  • Boatanchor (pesante apparecchio militare o commerciale, > 20 kg)
  • Dimensioni (LxAxP)
  • 480 x 260 x 300 mm / 18.9 x 10.2 x 11.8 inch
  • Annotazioni

  • Receiver type HRO-M (no bandspread for Ham bands) supplied for mounting in relay rack.

    Coverage: 50 kHz - 30 MHz (9 ganged coil sets 50-100 / 100-200 / 180-430 / 480-960 / 900-2050 kHz / 1,7-4 / 3,5-7,3 / 7-14,4 / 14-30 MHz, no bandspread in these coils available).

    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.

    HRO model Var. 5 with all wave coil sets without bandspread (only one printed calibration chart on coil sets), knobs with metal skirts (selectivity control in right upper corner also with metal skirt), black laquered micrometer dial and round S-meter.

    Power supply : Rack variant SPU-697 (filaments 6.3 V AC, B+ 240 V DC) used as standard, "doghouse" type power supply 697 also possible.

  • Peso netto
  • 16.5 kg / 36 lb 5.5 oz (36.344 lb)
  • Fonte esterna dei dati
  • Ernst Erb
  • Riferimenti schemi
  • Rider's Perpetual, Volume 17 = 1948 and before

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