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Works only when close
Microphone crackles
Scraping noises
check that frequency of transmitter and receiver
match.
Aerial placement. Move each dipole aerial in turn
checking the signal strengths on the RF displays for
improvements.
Check transmitter aerial for looseness and damage.
Check receiver aerials are vertical and with the [E]
element at the bottom.
Experiment with receiver aerial positions, while ob-
serving the RF displays on the receivers.
Screw-lock connectors need to have their locking ring
tight. Check for looseness.
Snap fit connectors should be fully home.
If you think you have found a faulty microphone, test
your suspicions by substituting a working micro-
phone from another unit. Then confirm by trying the
suspect microphone on a pack that is known to work
without crackling.
Check that the capsule does not come into contact
with costume or jewellery.
Cable scraping can cause spurious noises. Secure the
microphone cable by passing it inside the crocodile
jaws of the clip, creating a small semi-circular loop of
cable just below the microphone capsule. Scraping
noises travelling along the cable should be stopped
where the cable is gripped.
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