When interference is encountered, shift to the other "peak"
and use the one which gives minimum interference.
A station within easy receiving range operating at a
frequency below 680 kc. can usually be tuned in at four (instead
of the usual two) positions of the right-hand drum. This effect
occurs in normal operation of this Radiola and is not an
indication of any defect in the Radiola.
It is recommended that
one of the two settings of the right-hand drum N, which
corresponds approximately to that of the left-hand drum
G
,
be
used.
(2) Two distant stations on the same frequency may be
separated by rotating the loop, provided they are not in the same
general direction from Radiola 25. Set the loop on Radiola 25
where best results are secured, trying to locate a position where
the interference or undesired signals do not come in, but the
desired signals do.
Head Telephones. If
it is desired to locate distant stations
with a pair of head telephones, the telephone plug may be
inserted in the first stage telephone jack (Fig. 15).
Calibration.
The buff surfaces on the drums of the Station
Selector Control (see Fig. 16) provide a means for recording the
settings of the various stations. Once a station is recorded, the
drums may be reset at any later time to these positions, and if the
station is broadcasting and reception conditions at the particular
time are favorable, it should be heard. Before starting to record
these settings, the operator should become familiar with the
controls, and accustomed to tuning in stations. Records should be
made with a soft pencil and should be as small and neat as
possible, to permit the recording of the maximum number of
stations. Should the frequency assignments of the broadcasting
stations be changed, and should it consequently be desired to
change the markings, erasures may be made with a soft eraser,
using light pressure.
Note that in a few places throughout the country, par-
ticularly in the metropolitan areas, there may be two or more
stations assigned to the same wavelength or frequency, but
apportioned different hours of the day so that they will not be "on
the air" at the same time. Examples of duplicate frequency
assignments will be found in the "List of Broadcasting Stations"
in the rear of the pages of this booklet. Under such conditions, the
drum settings should be the same for both stations.
Station Log.
The log sheets in the back of the book may be
used to record stations heard, if it is preferred not to mark on the
Station Selector drums or if a more detailed record is desired.
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