Loudspeaker in the form of
a table lamp (Aladin Lautsprecher Stehlampe)
Grawor
(Rundfunktechnischer
Erzeugergemeinschaft GmbH, Grass & Worff,
Berlin)
sold the
"Schalldose" integrated in the base of the lamp in
a number of versions: e.g. the Grawor-Konus-Dose and the Grawor-Sektor-Dose.
The price was 15 and 18 RM respectively (Illustrierter
Radio-Katalog 1929/30). By turning the knob in the middle of the
"Schalldose" (see picture below), the magnetic system can be
adjusted to maximum sound volume. (Many thanks to John Hupse for his information about
this system.)
The casing of the "Schalldose"
is made of Zamac, a zinc and aluminium alloy, that tends to
deform after a few decades. Changing the distance between reed
and magnet by turning the knob was not possible any more. By
bending the reed slightly inwards the problem was solved.
Data
Made in:
±1930
Purchased in:
2005
Dimensions:
Height:
about 54 cm, diameter of the shade 36 cm
Impedance:
2000 Ohms
Detail
The disc of the loudspeaker
(diameter 30 cm),
mounted on top of a thin aluminium spindle.
Aladin by night
How does it sound? Listen to a short
sound clip. The speaker was
connected to my Philips 2514.
The base of the loudspeaker
The Schalldose is
visible here. In the middle a knob to adjust the volume
of the sound.
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