Specifications

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R8B Technical Specifications
Frequency Range: 10-30,000 kHz
Modes: AM, LSB, USB, CW, RTTY, FM
Sensitivity: SSB, CW: Typical 0.5 µV, 0.100-30,000 kHz
(10dB S+N/N) Less than 0.25 µV, 100-30,000 kHz (pre-amp on)
Sensitivity: AM: Typical 1.5 µV, 100-30,000 kHz
(10dB S+N/N) Less than 0.8 µV, 100-30,000 kHz (pre-amp on)
(1000 Hz, 30% mod)
Sensitivity: FM (12 dB SINAD):
Less than 0.5 µV, 100-30,000 kHz
Frequency Stability: ±5 ppm, -10º to 50º C
Frequency Accuracy: Better than ±100Hz, -10º to 50º C
Selectivity: 6 kHz @ -6 dB, less than 12 kHz @ -60 dB
AM, LSB, USB, RTTY, CW modes:
4 kHz @ -6 dB, less than 8 kHz @ -60 dB
2.3 kHz @ -6 dB, less than 4.5 kHz @ -60 dB
1.8 kHz @ -6 dB, less than 3.6 kHz @ -60 dB
500 Hz @ -6 dB, less than 1.5 kHz @ -60 dB
FM Only: 12 kHz @ -6 dB, less than 25 kHz @ -60 dB
Ultimate Selectivity: Greater than 95 dB
Image Rejection: Greater than 80 dB, 100-30,000 kHz
IF Rejection: Greater than 80 dB, 45 MHz
Greater than 100 dB, 50 kHz
Dynamic Range:
95 dB, 100-30,000 kHz @ 20 kHz spacing, 2.3 kHz IF BW (pre-amp on)
99 dB, 100-30,000 kHz @ 20 kHz spacing, 2.3 kHz IF BW (pre-amp off)
Intercept Point:
+20 dBm @ 20 kHz spacing (pre-amp off)
+10 dBm @ 20 kHz spacing (pre-amp on)
Greater than -20 dBm @ 5 kHz spacing
First IF: 45 MHz
Second IF: 50 kHz
Tuning Step Sizes: 10 Hz
AGC Threshold: 0.8 µV
Attack Time: 1 mS
Release Time:
SLOW: 2 Sec - FAST: 300 mSec
Less than 4 dB change in audio output for 100 dB input
change ref. AGC threshold
Antenna 1, Converter: 50 Ohms unbalanced
Antenna 2: 50 or 500 Ohms unbalanced
Notch Filter Attenuation: AF type, 40 dB min. (500-5000 Hz)
External Speaker Output: 2.5 W, 4 Ohms @ less than 5% distortion
Line Outputs: 300 mV, 4.7 K Ohms
AC Power Requirements: 100/120/200/240 VAC, ±10% 50 or 60 Hz, 40 Watts nominal
DC Power Requirements: 11-16 VDC @ 2 amp
Operating Temperature: -10º to 50º C
Weight: 13 lbs. (5.9 kg)
Size: Height: 5-1/4" (13.4 cm) including feet
Width: 13-1/8" (33.4 cm)
Depth: 13" (33 cm) including front knobs and rear connectors
Icom IC-R9000