NIKKO R-5000

Commentary

An FM/AM receiver based on A-500 and T-300 in a single case.

A pure complimentary service OCL circuit is used for the main amplifier.

The equalizer stage of the preamp section is a 3-stage direct NF type, which provides a large allowable input and a high SN ratio.

The power supply is equipped with a 6,800 μ Fx2 capacitor.

The FM tuner uses FETs for the front end and ICs for the IF stage and MPX stage, improving not only high-frequency characteristics such as sensitivity and selectivity but also audio characteristics such as distortion and separation.

Equipped with two types of tape terminals.

The preamplifier section and main amplifier section can be separated.
The tuner section also has a 4-ch signal output terminal.

Equipped with FM muting circuit, low filter, and high filter.

Klix/Klukš top type is used for tone control.

A NIKKO circuit breaker is used to protect the power supply and speakers.

Model Rating

Type	FM/AM Receiver
FM Tuner Section
Sensitivity (IHF)	2.3 μ V
Image interference ratio	60dB
IF interference ratio	80dB
Signal-to-noise ratio	60dB
Capture ratio	3.0dB
Distortion factor	stereo:0.8%
Stereo separation	38dB
Selectivity	40dB
<AM Tuner Section>
Sensitivity	250 μ V/m
Image interference ratio	45dB
IF interference ratio	40dB
Signal-to-noise ratio	50dB
Distortion factor	1.5%
Selectivity	25dB
Amplifier Unit
Music Power (IHF)	70W (8 Ω)
Effective output (1 kHz)	Single-channel Operation : 26W/26W (8 Ω) Both channels operating : 22W + 22W (8 Ω)
Frequency characteristic	10 Hz to 50 kHz (Main in)
Output bandwidth	20 Hz to 20 kHz -1dB
Distortion factor	0.1% (at 1W output)
Input Sensitivity / Impedance	Phono : 2mV/47k Ω Aux, Tape : 150mV/50k Ω
Signal-to-noise ratio	Phono:60dB Other : 80 dB
Tone control	Bass : ± 10 dB (70 Hz) Treble : ± 10 dB (10 kHz)
Loudness	+ 10 dB at 70 Hz, + 5 dB at 10 kHz
Filter	Low:-3dB(50Hz) High:-3dB(7kHz)
<General>
External dimensions	Width 455x Height 137x Depth 370 mm
Weight	10kg