Screened Grid 3

Yewdonia; GB

  • Year
  • 1933 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • ID
  • 103190

 Technical Specifications

  • Number of Tubes
  • 3
  • Valves / Tubes
  • Main principle
  • TRF with regeneration; Screengrid 1926-1935
  • Tuned circuits
  • 3 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • Magnetic loudspeaker (reed) generic. / Ø 8 inch = 20.3 cm
  • Material
  • Wooden case
  • from
  • Model: Screened Grid 3 - Yewdonia; GB
  • Shape
  • Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.
  • Source of data
  • - - Data from my own collection
  • Author
  • Model page created by Bill Meacham. See "Data change" for further contributors.

 Collections | Museums | Literature


The model Screened Grid is part of the collections of the following members.


Forum contributions about this model: Yewdonia; GB: Screened Grid 3

Threads: 1 | Posts: 5

Via an acquaintance in the UK I was able to find some tentative information regarding the provenance of this set. According to Mr. Gerry Wells, a well-known historian who owns a fantastic radio museum in Dulwich, South London, it was made by one of the small makers under the Plessey umbrella. Its still unknown why it would have Austrian components under the chassis but the coil covers and tuning cap are definitely Plessey as per Mr. Wells.
Furthermore he and others are in agreement that the set is from 1934 given the station markings on the dial. It is suspected that the set was a 'store model' possibly for Gamage's in London.
Its a 3-tube regenerative (reactive) battery set with 3 stages of RF selectivity. Uses valves (tubes) VP2, SP2 and PM2A. This is a fairly common circuit seen in some other sets of the era. Tunes 2 bands, Medium Wave and Long Wave. Battery voltage is 90-135 volts for B+, 1.5 to 2.0 volts for the filaments, and a pair of grid voltages -4.5 and -9.0

Bill Meacham, 12.Aug.06

Weitere Posts (5) zu diesem Thema.