• Country
• United States of America (USA)

• Manufacturer / Brand
• ADS, Analog & Digital Systems, Inc.; Wilmington, MA

• Year
• 1987 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 327240

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• PLL, Phase-locked loop; 2 AF stage(s)

• Wave bands
• Broadcast (BC) and FM or UHF.

• Power type and voltage
• Alternating Current supply (AC) / 120 Volt

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

• Power out
• 130 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Stereo Receiver R4 - ADS, Analog & Digital Systems,

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 445 x 70 x 360 mm / 17.5 x 2.8 x 14.2 inch

• Notes

• FM: 87.5 - 108MHz; AM: 522 - 1611 kHz.

  Similar to Braun Atelier R4/1

• Net weight (2.2 lb = 1 kg)
• 9.8 kg / 21 lb 9.4 oz (21.586 lb)

• Author
• Model page created by Gerhard Wickern. See "Data change" for further contributors.

• Other Models

• Here you find 5 models, 5 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from ADS, Analog & Digital Systems, Inc.; Wilmington, MA