• Year
  • 1949–1953
perfect model
  • Category
  • Amateur-Receiver (amateur bands, may include broadcast bands)
  • Radiomuseum.org ID
  • 43904

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 8
  • Main principle
  • Superhet with RF-stage; ZF/IF 455 kHz
  • Tuned circuits
  • 9 AM circuit(s)
  • Wave bands
  • Broadcast plus more than 2 Short Wave bands.
  • Power type and voltage
  • Line / Batteries (any type) / 105-125 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm
  • Material
  • Leather / canvas / plastic - over other material
  • from Radiomuseum.org
  • Model: S-72 - Hallicrafters, The; Chicago,
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 14 x 12.2 x 7.25 inch / 356 x 310 x 184 mm
  • Notes
  • 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

  • Net weight (2.2 lb = 1 kg)
  • 7.2 kg / 15 lb 13.7 oz (15.859 lb)
  • Price in first year of sale
  • 109.95 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 20 covering 1950

 Collections | Museums | Literature


The model is part of the collections of the following members.


Forum contributions about this model: 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.