Icom IC-F21 Service Manual - Section 1
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SECTION 1
SPECIFICATIONS
‘
‘
GENERAL
• Frequency coverage
: 440.000–470.000 MHz
• Type of emission
: 16K0F3E (at 25 kHz), 8K50F3E (at 12.5 kHz)
• Number of channels
: 2 ch (IC-F21S), 16 ch (IC-F21)
• Power supply requirement
: 7.2 V DC (negative ground)
• Current drain (approx.)
: Transmit
at High (4.0 W)
1.6 A
at Low2 (2.0 W) 1.2 A
at Low1 (1.0 W) 0.8 A
Receive
rated audio
250 mA
stand-by
70 mA
• Frequency stability
: ±0.00025 %
• Usable temperature range
: –30˚C to +60˚C; –22˚F to +140˚F
• Dimensions (projections not included)
: 54(W)
×
132(H)
×
37(D) mm; 2
1
⁄
8
(W)
×
5
1
⁄
32
(H)
×
1
15
⁄
32
(D) in.
• Weight (with ant., BP-209)
: 310 g; 10.9 oz.
‘
‘
TRANSMITTER
• RF output power (at 7.2 V DC)
: 4 W / 2 W / 1 W (High / Low2 / Low1)
(with supplied battery pack)
• Modulation system
: Variable reactance frequency modulation
• Maximum frequency deviation
: ±5.0 kHz (at 25 kHz), ±2.5 kHz (at 12.5 kHz)
• Spurious emissions
: 73 dBc (typical)
• Adjacent channel power
: 70 dB typical (at 25 kHz), 60 dB typical (at 12.5 kHz)
• Transmitter audio harmonics distortion
: Less than 3% typical at 1 kHz, 40% deviation
• Limitting charact of modulator
: 70–100% of max. deviation
• FM Hum and Noise
: 46 dB typical (at 25 kHz), 40 dB typical (at 12.5 kHz)
• Ext. microphone connector
: 3-conductor 2.5 (d) mm (
1
⁄
10
”)/2.2 k
Ω
‘
‘
RECEIVER
• Receive system
: Double conversion superheterodyne system
• Intermediate frequencies
: 1st
46.35 MHz
2nd
450 kHz
• Sensitivity
: 0.25 µV at 12 dB SINAD (typical)
• Squelch sensitivity
: 0.3 µV at threshold (typical)
• Adjacent channel selectivity
: 70 dB typical (at 25 kHz), 65 dB typical (at 12.5 kHz)
• Spurious response rejection
: 70 dB (typical)
• Intermodulation rejection ratio
: 70 dB (typical)
• Hum and noise (EIA only)
: 46 dB typical (at 25 kHz), 40 dB typical (at 12.5 kHz)
• Audio output power (at 7.2 V DC)
: 500 mW typical at 5% distortion with an 8
Ω
load
600 mW typical at 5% distortion with an 6
Ω
load
• Ext. speaker connector
: 2-conductor 3.5(d) mm (
1
⁄
8
”)/8
Ω
Specifications are measured in accordance with EIA/TIA-603.
All stated specifications are subject to change without notice or obligation.