Playmate Car-Portable 800T

World Radio Ltd.; London

  • Year
  • 1963 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 168716

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

 Technical Specifications

  • Number of Transistors
  • 6
  • Main principle
  • Superheterodyne (common); ZF/IF 470 kHz; 3 AF stage(s)
  • Tuned circuits
  • 5 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: Playmate Car-Portable 800T - World Radio Ltd.; London
  • Notes
  • Portable radio suitable for use in a car. Seperate aerial circuit for use in car avoids interference pick-up from ferrite aerial.
  • Source of data
  • -- Schematic
  • Author
  • Model page created by Keith Staines. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model Playmate Car-Portable is part of the collections of the following members.

 Forum

Forum contributions about this model: World Radio Ltd.;: Playmate Car-Portable 800T

Threads: 1 | Posts: 4

AS many members will know, AF117 and similar transistors such as AF115,116, and OC170/171 were used in a great many British made radios of the 1960s & early 70s.  Due to the method of construction employed in the manufacture of these transistors, together with the fact that they are now between about 45 and 55 years old, they are prone to developing internal leaks or short circuits between one or more electrodes or between these and the metal case of the device.  This os often referred to, at least on UK Vintage Radio forums as the 'Tin Whisker' problem, and whilst a cure can sometimes be effected, I prefer to replace transistors of this type with later devices such as the AF127.  However these are now becoming scarce and relatively expensive at may £3.00 or £4.00 each in the UK, so recently I have used a less expensive alternative, such as the Russian made GT322A or 322B, often available from eBay  for around £1.00 each.  These work very well in the radios to which I have fitted them, most recently a Roberts R300 portable, without needing any circuit alterations or modifications.

Michael Goscombe † 1.8.20, 09.Apr.16

Weitere Posts (4) zu diesem Thema.