How do I cure
interference?
Interference has many causes, so before we know how to cure it, we
need to know how it can be generated.
1) Induced on power supply cables. Not so common these days, and usually
associated with poor quality radio cassette units.
Cure: Inductance and filters on the supply leads.
2) RF born, from un-suppressed engines and components.
Again, most modern vehicles are very well suppressed, and do not require
more. Sometimes a panel or part of the exhaust can re-radiate, and the
solution can be time-consuming to trace, and may need expert advice.
Cure: Correct suppression techniques and bonding
of re-radiating panels.
3) Heavy whine etc associated with the installation
of high power amplifiers. An increasingly common problem, especially amongst
the DIY'ers out there.
Cure: A methodical installation and routing of
all cables, and careful siting of amps etc will often cure. In worst cases,
where a mis-match of voltage levels between units, graphics, and amplifiers
occurs, a line driver may be required. Road Radio can advise if you think
this could be your problem.
4) Poor reception of radio. Very often this is
described as interference, as it may manifest itself in various ways.
Cure: Either replace
the car aerial (leave the coathanger at the cleaners!) OR
have the unit checked.
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