In cream-colored and white plastic
housing.The radio can be
attached to the wall above a bed or at the headboard.
Afbeelding uit een
advertentie van Dahlberg
The radio is started by depositing a coin
(a dime, or a special token made by a hospital or hotel
that could be bought).The radio played for about an hour on 1
maximum of 5 coins could be inserted at a time.
A small speaker can be placed
under the pillow so that one can listen in bed.The elongated illuminated scale is
down so that it can be operated by someone lying down.The device only receives on medium wave.The radio is equipped
with a ferrite antenna.
On the front are the tuning knob and
the on/off/volume control;at the rear there are two switches,
noise suppression and one for tone control (treble/bass), an
antenna connection and a ground.On the left hand side
there is a hook, on which the loudspeaker can be hung
when it is not used.
There is also a version with a clock
instead of a coin mechanism.
The patent for the
radio dates from 1952, the first advertisements are also
from that year.
The original price was $225 for a
white model and $275 for a mint green one.
The radio is most likely made
for Dahlberg by Setchell-Carlson from St Paul,
Dahlberg was located in the sister city of St. Paul,
Mineapolis.The loudspeaker is
probably a Wright-Zimmermann Model 300 Dynamic
That company was located in a suburb of
Mineapolis, New Brighton.
The radio did not work
initially. The two intermediate frequency coils were no
longer adjustable, partly because some of the cores were
stuck, partly because the trimmers no
longer worked due to corrosion of the thin silver layer.The coils were
eventually provided with external trimmers, and were adjusted
again at 470 Kc.