Franzis Do-it-yourself, Руководство пользователя

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Initial testing and settings
Insert two 1.5V mignon alkaline batteries. Turn on the radio
and set the volume control to maximum. Turn the frequency
knob, and you will quickly find a station coming loud and clear
from the speaker.
Now you have to adjust the frequency. Use a radio at hand for
comparison. The station at the very bottom of the FM frequen-
cy range should appear at the left stop. You can shift the recep-
tion range by modifying the SP1 coil. Push the turns tighter to-
gether to receive lower frequencies. If there is still a large empty
area at the left to the bottommost station, pull the turns apart
a little again. For fine-tuning insert a screwdriver between two
turns to slightly bend them apart.
Once the lower band edge is adjusted correctly, you can also
adjust the upper 108 MHz edge. However, the frequency is de-
pendent on the battery voltage. If you realise during operation
that you cannot adjust the topmost station any more, just re-
place the batteries.