Screened Grid 3
- Great Britain (UK)
- Manufacturer / Brand
- Yewdonia; GB
- 1933 ??
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- Number of Tubes
- 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
- Magnetic loudspeaker (reed) generic. / Ø 8 inch = 20.3 cm
- Wooden case
- from Radiomuseum.org
- Model: Screened Grid 3 - Yewdonia; GB
- Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.
- Source of data
- - - Data from my own collection
- Model page created by Bill Meacham. See "Data change" for further contributors.
- Other Models
Here you find 1 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Yewdonia; GB
Forum contributions about this model: Yewdonia; GB: Screened Grid 3
Threads: 1 | Posts: 5
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