Loudspeaker cabinet with electrodynamic speaker
Oak cabinet with three black grille slats in front of the loudspeaker. On top of it the matching receiver, the Weco Wisselstroom Ontvanger Standaard.
The original price was f 125,-; the price of the radio was f 220,-.
Data
Serial number exitation unit: 2570, cabinet: 155
Dimensions (w × h × d) 58 x 75 x 28 cm
Made in 1929  
Purchased in 2013
Voltages 220 volts ~/ 6 volts -

What was broadcast in 1929?
 

Listen to "Lover, come back to me!" by Paul Whiteman and his Orchestra, sung by Jack Fulton, recorded in 1929

The interior of the loudspeaker cabinet
An excitation unit (consisting of a Weco transformer, a Weco "Oxydul" metal rectifier and a 2000 μF Aerovox capacitor) is mounted on a purple board below the Helios Dynamus (Weco) speaker. A schematic representation of the excitation unit can be seen in the picture on the right.
Because this type of metal rectifiers has a limited life span, the excitation system of these speakers was often removed. Luckily this loudspeaker cabinet was still complete. When it was restored, diodes were used, which are fixed invisibly behind the cell.
The capacitor is made by Aerovox Wireless Corporation, 493 Broome Street, New York City.
The Helios Dynamus comes from Germany and was made for Weco by Peter Grassmannn, Siemensstrasse 19, Berlin-Steglitz.
 

Picture of the loudspeker, together with the AC receiver in the leaflet "Weco radio-ontvangtoestellen" (many thanks to Gidi Verheijen)

Deze pagina is voor het laatst bijgewerkt op maandag 29 april 2019