R505

• Country
• Great Britain (UK)

• Manufacturer / Brand
• Roberts Radio Co.Ltd., East Molesey, Surrey, UK

• Year
• 1974–1979

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 89980

• Picture
• Schematics

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

• Number of Transistors
• 14

• Semiconductors
• unknown_tr unknown_tr BF194 BF194 BF195 BF195 BF195 BC148 BC148 BC148 BC158 BC158 AC187 AC188

• Main principle
• Superheterodyne (common); ZF/IF 470/10700 kHz

• Wave bands
• Broadcast, Long Wave and FM or UHF.

• Power type and voltage
• Batteries / addl. power jack / PP9: 1 x 9 Volt / 9 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical

• Power out
• 1 W (unknown quality)

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: R505 - Roberts Radio Co.Ltd., East

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 10.75 x 5.75 x 3.25 inch / 273 x 146 x 83 mm

• Notes

• A 3 band AM/FM portable transistor radio housed in a wooden case with leathercloth trim on the back and front and with teak end panels. With an elliptical 5 x 3 inch loudspeaker, 3.5mm jack for earphone, 5 pin DIN socket for tape recorder and 6mm socket for a 9 volt DC mains PSU. The 2 unknown transistors are in a Mullard VHF tuner module LP1402/2.

  Waveband Coverage
  MW 185-566 metres (1620-530kHz)
  LW 1152-2000 metres (265-150kHz)
  VHF 87-5-104.5 MHz

• Net weight (2.2 lb = 1 kg)
• 2 kg / 4 lb 6.5 oz (4.405 lb)

• Literature/Schematics (1)
• -- Original-techn. papers. (Roberts technical data R505 FM/AM Transistor Portable)

• Author
• Model page created by Howard Craven. See "Data change" for further contributors.

• Other Models

• Here you find 100 models, 96 with images and 44 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Roberts Radio Co.Ltd., East Molesey, Surrey, UK