• Country
• Great Britain (UK)

• Manufacturer / Brand
• Hacker Radio Ltd., Maidenhead

• Year
• 1977–1979

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 106889

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Superheterodyne (common)

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

• Power type and voltage
• Line / Batteries (any type) / 220-240 / 8 × 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical / Ø 8 inch = 20.3 cm

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

• from Radiomuseum.org
• Model: Sovereign IV RP77MB - Hacker Radio Ltd., Maidenhead

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

• Dimensions (WHD)
• 15.5 x 9.5 x 4.5 inch / 394 x 241 x 114 mm

• Notes
• Sockets: aerial, external loudspeaker, DIN for tape recorder. From 1977 the Sovereign IV was built by Hacker Radio Ltd in Maidenhead, from May 1978 built by Hacker Sound Ltd in Bournemouth and the radio called just Sovereign.

• Source of data
• - - Data from my own collection

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

• Other Models

• Here you find 56 models, 56 with images and 23 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hacker Radio Ltd., Maidenhead