Radio noise hum

[twins89]

Trying to listen to a football game on the radio. Announcers coming in clear but a horrible hum is also coming in. Any ideas on how to rid the hum.

[2oldman]

OP gone.

[SteveAE]

Hi,

My bet is that the noise is coming from your refrigerator power supply. Easy enough to find out, just turn the ref. off and see if the noise goes away. If this is the case for you, the solution is tough. I have put ferrite beads on the power lines, both at the ref. and at the radio, with some success, but not enough to feel it is a great solution. I have also shielded the refrigerator power supply with, again, limited success. The noise (that I have from the refrigerator) is both RF (transmitted through the air) and superimposed on the DC power system. The cheapest solution I have found (short of turning off the refrigerator) is to use a battery powered radio with an outside antenna.....and it still sucks for low signal strength stations.
The best solution (so far) is Sirius Radio (not XM if you plan to travel to Alaska, but Sirius).

Good luck,
Steve

[wa8yxm]

MORE INFO

Are you in an older trailer with a Magnetek 6300 Converter (THe 6300 does not know the lyrics so it hums along)

Many things can cause Hum, The above is all but guaranteed to do it. especially if the radio is after market and hooked to the wrong fuse.

Other things are gound faults. bad converters and external interference

The above applies to automotive adn other DC operated radios.

IF feeding a radio's AUX in with a cell phone powered off the RV's battery.
I mentioned GROUND FAULTS. that's a given with that hook up.

Finally we have 120 volt "Table top or Home theater" radios.

Bad power (MSW inverter) or bad power supply (Blown capacitor or bad diode)

[DrewE]

If you're using a 12V radio powered by the converter and you have an older converter, it may be putting a lot of noise on the 12V line. The battery can help clean up some of the noise. A newer converter that produces cleaner power would help a lot in this case. (Turning off the converter and running the radio off of battery power would also fix that problem.)

Poor or improper grounding somewhere can cause a hum.

AM radio is much more susceptible to interference such as hum than FM radio. If it's an AM broadcast and you're near something like high voltage power lines, you may simply be out of luck.

[ScottG]

Any florescent lights nearby? Try turning things off around the area.

[2oldman]

Throw us a bone. We don't know where this radio is, what kind of radio or what is near it.

[donn0128]

Add a filter it used to be very common. Usually alternator noise.