• Country
• Netherlands

• Manufacturer / Brand
• Erres, Van der Heem NV; Den Haag

• Year
• 1930

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 93938

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• Magnetic loudspeaker (reed) of high quality (4 magnet poles). / Ø 30 cm = 11.8 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: Luidspreker 4pol - Erres, Van der Heem NV; Den

• Dimensions (WHD)
• 345 x 335 x 175 mm / 13.6 x 13.2 x 6.9 inch

• Notes
• Design by Otto van Tussenbroek. Impedance 2000 Ohms. Speaker: Philips 2044

• Price in first year of sale
• 45.00 Hfl

• Literature/Schematics (1)
• Radio-Expres, Netherlands

• Author
• Model page created by John Koster. See "Data change" for further contributors.

• Other Models

• Here you find 408 models, 325 with images and 221 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Erres, Van der Heem NV; Den Haag