• Country
• United States of America (USA)

• Manufacturer / Brand
• Guthman & Co., Inc., Edwin I.; Chicago (IL)

• Year
• 1940

• Category
• RF (Radio Frequency-) Amplifier

• Radiomuseum.org ID
• 265056

• Number of Tubes
• 2

• Valves / Tubes
• 7A7 80

• Main principle
• TRF with regeneration

• Wave bands
• Broadcast plus more than 2 Short Wave bands.

• Power type and voltage
• Alternating Current supply (AC) / 60 cycles, 110 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Pre-Selector U-42 - Guthman & Co., Inc., Edwin I.;

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

• Dimensions (WHD)
• 12.25 x 7 x 7.5 inch / 311 x 178 x 191 mm

• Notes

• The Guthman U-42 High Gain Preselector is a RF amplifier tuning 490 to 46,000 kHz in five bands. 

• Price in first year of sale
• 19.40 USD

• Mentioned in
• Cameradio 1940 Catalog page 182.

• Author
• Model page created by Wayne Childress. See "Data change" for further contributors.

• Other Models

• Here you find 7 models, 7 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Guthman & Co., Inc., Edwin I.; Chicago (IL)