m-e Bell-556 TX Betriebs- Und Montageanleitung Seite 22

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Bell-556 TX
MOUNTING
Due to the small size, it is possible to place the radio converter in the housing
of the existing bell.
Make sure that the antenna (7) should be as straight as possible and point
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upwards in order to achieve the best possible range.
The antenna (7) must not be shortened or extended. When mounting, take
care not to damage the insulation of the antenna to prevent short circuits.
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