33-DM (E-33)

Arvin, brand of Noblitt-Sparks Industries

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  • Year
  • 1936/1937
  • Category
  • Car Radio, perhaps also + sound player/recorder
  • Radiomuseum.org ID
  • 32970

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

 Technical Specifications

  • Number of Tubes
  • 6
  • Main principle
  • Superhet with RF-stage; ZF/IF 170 kHz
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Storage Battery for all (e.g. for car radios and amateur radios) / 6.3 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: 33-DM - Arvin, brand of Noblitt-Sparks
  • Shape
  • Chassis only or for «building in»
  • Dimensions (WHD)
  • 8.5 x 8.5 x 6.5 inch / 216 x 216 x 165 mm
  • Notes
  • Vibrator for +B. Vibrator for +B. Rider's shows that the chassis type 33 has been published 1936 (or before). The Belknap Hardware & Manufacturing Co. Catalog of 1937 names this model on page 1063 with the model E-18 and E-28.

    The whole family is shown in that catalog with a prefix E- whereas schematics and other ads show the models without this prefix. The "E" could refer to this catalog only since also a storage battery U17 or U175D is here called E-U17 and E-U175D. But we have to add the prefix so that users do find if they put it in.

    The Harrison Wholesale Co., Chicago offers on page 158 of its "Mid-Summer 1936 Electrical Radio Catalog" No. 239 for dealers seven Arvin Car Radios with chassis 18, 28 and 33: Two type 33 are: model 33-DM with a Listprice $ 54.50, dealer price $ 32.70 and net 32.05 and 33-EM same with a separate 8 inch speaker for $ 62.85 / 37.71 / 36.96 including metal tubes for both models. All are with single hole mounting. Chassis cases are in Benton Gray Morocco, 28 and 33 with chromium plated speaker grill.
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 7 = 1936 and before

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