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Realistic Nova-Sound wireless remote speakers- frequency?

Anyone know the receive frequency of the Realistic Nova-Sound wireless remote speakers? Dumb thing has no part numbers, and is not listed in their hard to find manual archives.


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  • HamerPrototy Nov 14, 2014

    If they are what I have been looking for info on, the model number is listed on the bottom of the transmitter.

  • HamerPrototy Nov 14, 2014

    Sorry, forgot to list info !! Like I said, if it's what I've been looking for info on it's a Realistic #40-1360 (Nova-Sound FM Wireless Stereo Sound System) Hope that helps. I've been unable to locate specs or a manual since I picked mine up. Good Luck !!


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Low frequency hum almost always results from:

1) stray input pickup = Damaged cables, poor shielding,
Missing ground connections,
or ground loops.

This pickup occurs at the power line frequency:
50 Hz in Europe and Asia
60 Hz in North America

Harmonics (multiples) may occur as Fourier components
from signal distortion:
50, 100, 150, 200 .... in Europe
60, 120, 180, 240 .... in North America

Sub-harmonics such as 25 Hz are mathematically
impossible to derive from power line frequencies unless
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or frequency beating going on.

2) Defective power supply most often occurs at twice the
power-line frequency because of full wave rectification.

100, 200, 300... In Europe
120, 240, 360... In North America

Except for switching supplies, like those in a computer,
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3) Amplifier feed back and other malfunctions can produce
other low frequencies, often by rectifying and detecting
the envelope of very high frequencies in the tens or
hundreds of megahertz. This is called motor boating
and it sounds more like a revving motor boat than hum.

(This kind of behavior is unlikely in a well designed amplifier)

By correctly identifying the noise frequency and
the environment, it is possible to narrow down the culprit:

1) Have you actually measured or observed the frequency
on an oscilloscope ?

If not, do you have the equipment to do so?

2) Where are you, and what is your power line frequency?


If you have line frequency noise, possibly stray pickup,
check the cables, shields, make sure the turntable is
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between two auxiliary devices.

If you have twice the line frequency noise, check the
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Power supply filter capacitors (electrolytic type) can dry out,
degrade and die during long periods of not being used.
They need to be periodically charged to regenerate the
dielectric insulation coating.

Also if you are actually getting line frequency noise
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Full wave rectifier => twice the line frequency
Half wave rectifier => line frequency

A full wave rectifier with a blown diode behaves like half-wave.

From the description of your symptoms, hum is not affected
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A burned out power transistor in the output amplifier
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point of the amplifier but it can't.

Forget the voltmeter. If you have an oscilloscope, check
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