• Country
• Great Britain (UK)

• Manufacturer / Brand
• Perdio Electronics Ltd. / Products Ltd.; London, Stanmore

• Year
• 1958 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 148682

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

• Number of Transistors
• 4

• Semiconductors

• Main principle
• Superheterodyne (common); ZF/IF 470 kHz; 3 AF stage(s); Reflex

• Tuned circuits
• 4 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• Dry Batteries / 9 Volt

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

• from Radiomuseum.org
• Model: PR4 - Perdio Electronics Ltd. /

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 5.75 x 3.25 x 1.25 inch / 146 x 83 x 32 mm

• Notes
• Miniature "personal" receiver. 4 transistors & one diode. IF amplifier is also AF amplifier (Reflex).

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

• Source of data
• -- Schematic

• Circuit diagram reference
• Radio and TV Servicing books (R&TVS) book

• Author
• Model page created by Keith Staines. See "Data change" for further contributors.

• Other Models

• Here you find 62 models, 53 with images and 39 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Perdio Electronics Ltd. / Products Ltd.; London, Stanmore