Rectifier used for charging 1-3
storage cells. Input voltage 220 volts. Recommended
Philips 451 and 452. In this picture the 328 and 452
tubes are used. Made by N.V. Transformer-Works, Nieuwe Uilenburgerstraat 40 in
Amsterdam. This firm also made the battery eliminator
Assembly room of the
Transforma factory, Baarsjesweg 158, Amsterdam in 1927. Later
that year the company would move to Nieuwe Uilenburgerstraat 40.
A number of new transformers is visible on the table, behind the
workers. Child labour was still common.
Advertisement in Nieuwe Rotterdamsche Courant,
September 23rd, 1929