- Country
- Netherlands
- Manufacturer / Brand
- Waldorp, N.V. Ned. Instrumentenfabriek, Den Haag
- Year
- 1931
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 70227
Collection Jeroen Landman
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 4
- Conflicting model year with tube data.
- The model date contradicts tube dates. [ 1805 (1932)]
- Main principle
- TRF (Tuned-Radio-Frequency but use of regeneration unknown)
- Wave bands
- Broadcast (MW) and Long Wave.
- Power type and voltage
- Alternating Current supply (AC) / 125; 220 Volt
- Loudspeaker
- Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
- Material
- Wooden case
- from Radiomuseum.org
- Model: 428WL - Waldorp, N.V. Ned.
- Shape
- Tablemodel, low profile (big size).
- Notes
- Das Gerät hat drei Wellenbereiche: LW (900-2000 M), MW (300-600 M) und dem Bereich von 175-300 M.
- External source of data
- Radio Amateur Museum / Frans J.J. Driesens + ISBN 90-76014-04-3.
- Source of data
- -- Original prospect or advert
- Author
- Model page created by Ernst Erb. See "Data change" for further contributors.
- Other Models
-
Here you find 140 models, 92 with images and 42 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Waldorp, N.V. Ned. Instrumentenfabriek, Den Haag