Franzis Do-it-yourself, Руководство пользователя

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17
Reception practice
When fine-tuning a station, the receiver’s AFC (Automatic Fre-
quency Control) will lock on to the exact frequency. Then the
station can be heard in a certain range of the frequency control-
ler. Position the controller as exact as possible in the middle of
this range. If battery voltage drops sharply during operation,
the frequency may change and you will have to re-tune into the
radio station. Depending on the modulation of the transmitter
there may be sound distortions due to over-modulation of the
power amplifier. If this happens, turn down the volume control
a little. With its moderate volume level the FM retro radio is
ideally suited for a relaxed listening experience in the evening.
If you extend the telescopic antenna to its full length, the radio
can receive every strong local station. Connecting a longer an-
tenna wire will allow you to receive also weaker stations (for in-
stance the local stations of the neighbouring towns). To achieve
an even more powerful reception performance you can con-
nect a second, additional antenna wire to the GND connection.
Thus you will have a dipole antenna. The optimum length is 75
cm per wire. You can improve the reception of a weak station by
carefully aligning both wires.