- Country
 - Germany
 
- Manufacturer / Brand
 - Lorenz; Berlin, Zuffenhausen u.a.
 
- Year
 - 1931/1932
 
- Category
 - Broadcast Receiver - or past WW2 Tuner
 
- Radiomuseum.org ID
 - 2973
 
- 
        
- Brand: SEL
 
 
- Number of Tubes
 - 3
 
- Main principle
 - TRF with regeneration; 1 AF stage(s)
 
- Tuned circuits
 - 1 AM circuit(s)
 
- Wave bands
 - Broadcast (MW) and Long Wave.
 
- Power type and voltage
 - Alternating Current supply (AC) / 110; 125; 150; 220 Volt
 
- Loudspeaker
 - - This model requires external speaker(s).
 
- Material
 - Metal case
 
- from Radiomuseum.org
 - Model: 231W - Lorenz; Berlin, Zuffenhausen u
 
- Dimensions (WHD)
 - 290 x 230 x 215 mm / 11.4 x 9.1 x 8.5 inch
 
- Price in first year of sale
 - 99.00 RM !
 
- Source of data
 - Katalog Radio-Zentrale Prohaska 1931/32 / Radiokatalog Band 1, Ernst Erb
 
- Picture reference
 - Das Modell ist im «Radiokatalog» (Erb) abgebildet.
 
- Other Models
 - 
        
Here you find 736 models, 590 with images and 363 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Lorenz; Berlin, Zuffenhausen u.a.