• Jahr
  • 1949–1953
perfect model
  • Kategorie
  • Amateur-Empfänger (Amateur-Bänder, zudem auch Rundfunkbänder möglich)
  • Radiomuseum.org ID
  • 43904

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 Technische Daten

  • Anzahl Röhren
  • 8
  • Hauptprinzip
  • Super mit HF-Vorstufe; ZF/IF 455 kHz
  • Anzahl Kreise
  • 9 Kreis(e) AM
  • Wellenbereiche
  • Mittelwelle und mehr als 2 x Kurzwelle.
  • Betriebsart / Volt
  • Netz- / Batteriespeisung / 105-125 Volt
  • Lautsprecher
  • Dynamischer LS, keine Erregerspule (permanentdynamisch) / Ø 5 inch = 12.7 cm
  • Material
  • Leder / Stoff / Plastic / Segeltuch über div. Material
  • von Radiomuseum.org
  • Modell: S-72 - Hallicrafters, The; Chicago,
  • Form
  • Reisegerät > 20 cm (netzunabhängig betreibbar)
  • Abmessungen (BHT)
  • 14 x 12.2 x 7.25 inch / 356 x 310 x 184 mm
  • Bemerkung
  • AC/DC battery portable. Luggage-type cabinet in brown leatherette. Weight 16lbs., less battery pack. The price in the Sears Catalog is $ 109.95. See also the Hallicrafters model S-72L.

    Sears order number : 57E 07457

  • Nettogewicht
  • 7.2 kg / 15 lb 13.7 oz (15.859 lb)
  • Originalpreis
  • 109.95 $
  • Datenherkunft extern
  • Ernst Erb
  • Schaltungsnachweis
  • Rider's Perpetual, Volume 20 covering 1950

 Sammlungen | Museen | Literatur

Sammlungen

Das Modell befindet sich in den Sammlungen folgender Mitglieder.

 Forum

Forumsbeiträge zum Modell: Hallicrafters, The;: S-72

Threads: 1 | Posts: 2

The original version had an ANL on/off switch above the earphone socket (Automatic Noise Limiter). The wood under the brass grill still has the hole on later S72R models. The S72R appears to have been sold till 1959.

The S72R seems to have several revisions and early versions seem the same as S72. Later versions have a second electrolytic multicap mounted in the hole beside the main one. This fouls any earphone headset on rear panel, unless it's narrow or soft head strap.

A variety of large 7.5V/90V (and 7.5V/9V) battery packs are compatible. It has two paralleled series filament chains, so a filament failure when on AC mains can cause a second failure.

The mains plug is docked on chassis to switch over to battery power. A box with 60 x AA cells and 5 Alkaline D cells is quite economic to power it and can be in a replica case.

The mixer and oscillator are two separate tubes, allowing reliable operation to 30MHz at end of LT. The BFO on/off (for CW, or possibly SSB) is also RF gain when  the BFO is on. There are two 1U4 for the IF amp. A second IU5 is the BFO.

Performance may be better than the Zentith Transoceanic and the RCA and Hallicrafter versions of it, but at expense of half the battery life! The electrical band spread allows easy tuning even though it's continious coverage from about 540KHz to 30MHz in only four bands that slightly overlap..

Michael Watterson, 09.May.16

Weitere Posts (2) zu diesem Thema.