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Radio - A
head unit that combines a tuner,
a preamplifier, and a
power-amplifier. |
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Radio
Frequency Interference (RFI)
- Electromagnetic waves between
the frequencies of 10 KHz and 300
GHz that can affect susceptible
systems by conduction through
sensor (tape head) or power input
lines, and by radiation through
space. |
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RAM -
Random Access Memory. A memory
device that one can write data to
and read data from. |
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Relay
(SPDT) - (Single Pole Double
Throw Relay) an electromagnetic
switch, consist of a coil
(terminals 85 & 86), 1 common
terminal (30), 1 normally closed
terminal (87a), and one normally
open terminal (87). |
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Remote Turn
On Lead - The lead from the
head unit which supplies a signal
(12V+) to the "remote turn
on" lead of the amplifier
turning the amplifier on when the
head unit is turned on, and
allowing the amplifier to be
mounted in a location out of
reach of the user. This is NOT
the amplifier's main source of
power. |
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Resistance
- The opposition to the flow of
AC or DC voltage in an electric
current. Measured in ohms. |
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Resistor
- An electrical device that
resist the flow of electrical
current. The higher the value of
resistance (measured in ohms)
the lower the current will be. |
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Resonance
- Pitch. When you tighten a drum,
you raise it's resonance. |
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Resonant
Frequency - Frequency at
which there is a response peak,
due to a specific interaction of
inductive and capacitive
circuitry in an audio devise or
system. |
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RMS -
Root Mean Square. |
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ROM -
Read Only Memory. A memory device
that one can only read data from.
The data has been pre-programed. |
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