Silvertone 1670 Late (osc. 24A)

Sears, Roebuck & Co.; Chicago (IL)

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  • Year
  • 1933
perfect model
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 55902
    • Brand: Silvertone

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

 Technical Specifications

  • Number of Tubes
  • 11
  • Main principle
  • Superheterodyne (common); ZF/IF 175 kHz
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 110 - 120 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 10 inch = 25.4 cm
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Silvertone 1670 [Late ] - Sears, Roebuck & Co.; Chicago
  • Shape
  • Console, Lowboy (legs < 50 %).
  • Dimensions (WHD)
  • 24 x 40.25 x 13.5 inch / 610 x 1022 x 343 mm
  • Notes
  • This model Silvertone 1670 was probably first available with only one tuned IF with 3 tuned circuits as "Early", schematic "A" in Rider's page 6-17 and probably facing difficulties with the second IF only being an untuned IF transformer. On page 6-18 can be found a schematic "B" as "Late" with a second tuned IF transformer with two tuned circuits for more selectivity. Most probably there was no other change and clients did not know a change. First production used a 58 oscillator, the "Late" a 224A oscillator. See the common pages 6-16 and 6-19. 3-gang tuning condenser, hum bucking coil on loudspeaker (together with the speaker field coil). The model 1650 is technically identical but uses only one tube 280, thus having 10 tubes.
    Pre-War Consoles by Mark V. Stein brings a wrong picture on page 174, confusing with the Silvertone 1641.
    The Sears Silvertone 1670 is a 11-tube Low-Boy console radio with 6 feet and a stretcher base. It offers only standard broadcast 175 to 550 meters which did bring in also some police calls. Double pentode output (parallel). 10-inch super dynamic speaker. Cabinet in high gloss walnut. The instrument panel is of richly mottled and figured walnut veneer and the front side panels are of sliced stripe walnut veneer. The overlay of the top front rail is blistered maple veneer.
    Order number 57LM 1670 1/4 with tubes for $ 49.50 or for easy payment: $ 5 "down" cash and $ 5 per month until paid $ 54.50. See details and summaries about Sears catalogs etc.
  • Price in first year of sale
  • 49.50 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 6 = 1935 and before

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