- Country
- Great Britain (UK)
- Manufacturer / Brand
- Columbia Graphophone Co.; London
- Year
- 1930
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 231104
Prospekt Poster (Französisch)
Prospekt Poster (Französisch)
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 5
- Main principle
- TRF with regeneration
- Tuned circuits
- 2 AM circuit(s)
- Wave bands
- Broadcast (MW) and Long Wave.
- Details
- Record Player (not changer)
- Power type and voltage
- Alternating Current supply (AC)
- Loudspeaker
- Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
- Material
- Wooden case
- from Radiomuseum.org
- Model: 308 - Columbia Graphophone Co.;
- Shape
- Console, Lowboy (legs < 50 %).
- Notes
-
A four valve (+ rectifier) radio-gramophone in pedestal cabinet with silver oxidised metal escutcheon and pilot lamp. For medium and long wave reception. Thumbwheel tuning, volume control (Intensifier) and reaction. With screen-grid valve, detector and pentode output valve. The HF is tuned anode and the detector is resistance/capacity coupled to the intervalve transformer. A hum bucking circuit is used for smoothing, and a hum adjusting device, consisting of grid-leak to detector brought to potentiometer across heater winding.
- Source of data
- Wireless World (The), London (WW, 79)
- Author
- Model page created by John Koster. See "Data change" for further contributors.
- Other Models
-
Here you find 58 models, 36 with images and 23 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Columbia Graphophone Co.; London