All Electric Automatic Radio-Gramophone De Luxe 291 DC
Marconi Co. (Marconiphone, Marconi's Wireless Telegraph Co. Ltd.), GB (not tubes - see also HMV His Master's Voice)
- Country
- Great Britain (UK)
- Manufacturer / Brand
- Marconi Co. (Marconiphone, Marconi's Wireless Telegraph Co. Ltd.), GB (not tubes - see also HMV His Master's Voice)
- Year
- 1934/1935
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 17833
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 7
- Main principle
- Superhet with RF-stage; ZF/IF 117 kHz; 2 AF stage(s)
- Tuned circuits
- 8 AM circuit(s)
- Wave bands
- Broadcast (MW) and Long Wave.
- Details
- Changer (Record changer)
- Power type and voltage
- Direct Current supply (DC) / 200-210; 211-230; 231-250 Volt
- Loudspeaker
- Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
- Material
- Wooden case
- from Radiomuseum.org
- Model: All Electric Automatic Radio-Gramophone De Luxe 291 DC - Marconi Co. Marconiphone,
- Shape
- Console, Lowboy (legs < 50 %).
- Notes
-
The Marconi 291 DC uses 2 metal rectifier diodes for AVC (MR1) and demodulation (MR2). Push-pull output amplifier.
The Marconi DC models 39, 239, 276, 290 and 291 share the same schematic. This according to the Thali collection (Switzerland).A DC mains console radiogram with a MW and LW radio and an autochanger.
- External source of data
- E. Erb 3-907007-36-0
- Circuit diagram reference
- Die «Thali Schemasammlung» führt das Modell.
- Other Models
-
Here you find 500 models, 334 with images and 316 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Marconi Co. (Marconiphone, Marconi's Wireless Telegraph Co. Ltd.), GB (not tubes - see also HMV His Master's Voice)