• Year
  • 1938
  • Category
  • Amateur-Receiver (amateur bands, may include broadcast bands)
  • Radiomuseum.org ID
  • 18683

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

 Technical Specifications

  • Number of Tubes
  • 9
  • Main principle
  • Superhet with RF-stage; ZF/IF 465 kHz
  • Tuned circuits
  • 11 AM circuit(s)
  • Wave bands
  • Broadcast, Short Wave(s) and Police.
  • Power type and voltage
  • Alternating Current supply (AC) / 110-120 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Power out
  • 3.5 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Sky Challenger II S-18 - Hallicrafters, The; Chicago,
  • Shape
  • Tablemodel, low profile (big size).
  • Notes
  • The Hallicrafters model S18 covers with the following 5 bands from 0.545 to 38.1 mc: 0.545 - 1.23 mc, 1.18 - 2.85 mc, 2.75 - 6.82 mc, 6.75 - 16.40 mc, 15.40 - 38.10 mc (MHz). Recessed Main Dial, Infinite image rejection Circuit on Bands 4 & 5. Socket on rear apron for optional "S" Meter. The 9 tubes are: 6K7 RF Amp; 6L7 as 1st Detector/Mixer; 6J5 Oscillator; 6K7 as 1st IF Amp; 6K7 as 2nd IF Amp; 6Q7 as 2nd Detector / AVC /1st Audio stage; 6F6 Audio Output; 6J7 BFO; 80 Full Wave Rectifier.
  • Price in first year of sale
  • 77.00 $
  • External source of data
  • E. Erb 3-907007-36-0
  • Circuit diagram reference
  • Rider's Perpetual, Volume 13 = 1942 and before

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The model Sky Challenger II is part of the collections of the following members.

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