C-crane CCRadio User Manual download pdf (Page 19)

RADIO NOISE TROUBLESHOOTING

Annoying buzzes are many times

transmitted through an AM radio.

Here is a check-off list of the most

likely causes:

• Dimmer switch.

• Fluorescent light.

• “Touch lamp” type light fixture

(even when turned off).

• Automatic on and off night lights.

• Outdoor yard lights which come on

automatically.

• Electronic bug and pest controllers.

• A light bulb that is about to burn out.

• A faulty electrical switch of any kind.

• A nearby television set.

• A store that has a fluorescent light

or a public recreation room that has

fluorescent lights located near you.

• Blinking bulbs of all kinds such as

Christmas tree lights.

• If you live in an apartment a

neighbor’s dimmer switch could be

the culprit.

• Scanners of all types.

• Dirty insulators on a nearby power

pole allowing arcing.

• Electric blanket.

• Smoke detectors that run from AC

current (battery operated is OK).

AM R

ADIO

N

OISE

P

ROBLEMS AND

P

OSSIBLE

S

OLUTIONS

It is best to eliminate the interfer-

ence at its source. Here’s a list of

possible solutions:

• The most obvious is to turn off the

offending device.

• Try a battery operated radio to see if

the interference is coming in from

the AC 120v line, through the air, or

both.

• Turn off the circuit breakers to see if

the noise stops. If it does, then you

know it is something in your house.

Turn off one circuit at a time to iso-

late where the noise is coming from.

• Use a battery operated radio as a

direction finder. Turn the radio until

the loudest noise is heard and the

front and back of the radio will point

to the noise origin.

• Carry a radio around the neighbor-

hood and see if you can find the

origin of the noise. Ask other neigh-

bors if they have the same problem.

• If a power pole is suspected, call

the utility company and they will

check the area and possibly wash

the insulators. Dirty power pole insu-

lators are sometimes a cause of

difficult-to-find radio interference.

• If you have a hum in your receiver

from AC line noise sometimes

grounding the radio can reduce the

hum greatly. Finding a good earth

ground may be difficult.

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