• Country
• United States of America (USA)

• Manufacturer / Brand
• Autek Research; Wesley Chapel, FL

• Year
• 1977 ?

• Category
• Amateur Equipment (Other, but not Key)

• Radiomuseum.org ID
• 189897

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

• Number of Transistors
• 2

• Semiconductors

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

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

• Material
• Metal case

• from Radiomuseum.org
• Model: IC Audio Active-Filter QF-1 - Autek Research; Wesley Chapel,

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Dimensions (WHD)
• 114 x 90 x 140 mm / 4.5 x 3.5 x 5.5 inch

• Notes
• The QF-1 audio filter is a 4 pole filter with Peak, Notch and LowPass functions; the frequency and selectivity are separately adjustable from panel controls; the QF-1 off switch does not bypass the filter, so when it is turned off don't get any audio at the output.

• Net weight (2.2 lb = 1 kg)
• 0.4 kg / 0 lb 14.1 oz (0.881 lb)

• Source of data
• -- Original-techn. papers.

• Author
• Model page created by Emilio Focosi. See "Data change" for further contributors.

• Other Models

• Here you find 2 models, 2 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Autek Research; Wesley Chapel, FL