S-40 (2nd Revision)

• Country
• United States of America (USA)

• Manufacturer / Brand
• Hallicrafters, The; Chicago, IL and Arlington/Grand Prairie, TX

• Year
• 1946/1947

• Category
• Amateur-Receiver (amateur bands, may include broadcast bands)

• Radiomuseum.org ID
• 18691

• Picture
• Schematics

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

• Number of Tubes
• 9

• Valves / Tubes
• 6SG7 6SA7 6SK7 6SK7 6SQ7 6F6 6H6 6J5 80

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 9 AM circuit(s)

• Wave bands
• Broadcast, Short Wave(s) and Police.

• Power type and voltage
• Alternating Current supply (AC) / 117 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm

• Power out
• 2.5 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: S-40 - Hallicrafters, The; Chicago,

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 18.5 x 9 x 11 inch / 470 x 229 x 279 mm

• Notes

• Hallicrafters S-40 (2nd Revision) used a Permanent Magnet (PM) Speaker.  The chassis Speaker Socket and the Speaker cable assembly Plug were deleted.  A grommet was installed in place of the Socket on the chassis and the Speaker wires (2) and Audio Transformer wires (2) were routed through the grommet and directly soldered in circuit.

  The following table lists some of the easy-to-identify differences of the S-40 versions.

  Additional circuit differences (resistors, capacitors, wiring) are not described here; refer to the schmatics for additional differences.  Note that the "U" model used a Universal power transformer (120/240 volts; 25-60 Hz) for export and it is unknown which S-40 versions had a "U" version.

  Refer to S-40 (Original) for the Guide to Identifying Hallicrafters S-40 Versions document.

  Other A/B versions include S-40A (Runs 1-2) and S-40B.

  S-40 Model Differences

  Model	Tubes	Rectifier Tube	Speaker Type	Speaker Socket/Plug	Audio Xfmr Location
  S-40 (Original)	9	80	FC	Y	TOP
  S-40 (1st Revision)	9	80	PM	Y	TOP
  S-40 (2nd Revision)	9	80	PM	N (grommet)	TOP
  S-40U	9	80	?	?	TOP

  Coverage: 0.54-1.7MHz, 1.7-5.35MHz, 5.35-15.7MHz, 15.7-43MHz , DC Operation also by a 6Volt Storage Battery and "B" Batteries or Vibrapack.

  Cabinet design by Raymond Loewy.

  Included in New York's Museum of Modern Art Collection.

• Net weight (2.2 lb = 1 kg)
• 28 lb (28 lb 0 oz) / 12.712 kg

• Price in first year of sale
• 79.50 USD

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Communications Receivers

• Circuit diagram reference
• Rider's Perpetual, Volume 15 = 1947 and before

• Mentioned in
• ARRL Radio Amateur's Handbook 1947

• Literature/Schematics (1)
• Beitman Radio Diagrams, Vol. 09, 1949 (erroneously named S-40A)

• Literature/Schematics (2)
• The Spectrum Monitor, June 2020, p 83-88, Adventures in Radio Restoration [S-40] by Rich Post KB8TAD

• Literature/Schematics (3)
• Radios by hallicrafters (2nd Edition, pgs. 49-50)

• Literature/Schematics (4)
• Photofact Folder, Howard W. SAMS (Set 2, Folder 19, Jan 1947)

• Other Models

• Here you find 922 models, 473 with images and 520 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hallicrafters, The; Chicago, IL and Arlington/Grand Prairie, TX