• Country
• United States of America (USA)

• Manufacturer / Brand
• Atwater Kent Mfg. Co.; Philadelphia, USA

• Year
• 1923

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 187048

• Number of Tubes
• 1

• Valves / Tubes
• UV201

• Main principle
• Audio-Amplification; 1 AF stage(s)

• Wave bands
• - without

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Metal case, TUBES VISIBLE

• from Radiomuseum.org
• Model: 4030 One Stage Audio Amplifier - Atwater Kent Mfg. Co.;

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 5.75 x 3 x 5.75 inch / 146 x 76 x 146 mm

• Notes
• The one stage audio amplifier came after the two stage AK audio amplifiers. The unit was assigned the part number 4030 by Atwater Kent. The one-stage unit consisted of an audio transformer insulated from the metal case with a sheet of phenolic and encased in a tar-like substance. The filament was controlled by a 2 ohm rheostat. there were three different variations of this amplifier. The first version used a 2-Stage tag with the 2 painted over with black paint. The second version had the 2 milled off and a 1 stamped in it's place. The last version had a 1-Stage id tag like the 2-Stage amp with the 1 raised up. This part was sold to hobbyists who wanted another stage of audio amplification. It was never used in a AK production radio.

• Literature/Schematics (1)
• Radio Age Newsletter February 2007

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 507 models, 330 with images and 332 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Atwater Kent Mfg. Co.; Philadelphia, USA