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Icom IC-F21 Service Manual

Icom IC-F21
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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
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 load
600 mW typical at 5% distortion with an 6 load
• Ext. speaker connector : 2-conductor 3.5(d) mm (
1
8”)/8
Specifications are measured in accordance with EIA/TIA-603.
All stated specifications are subject to change without notice or obligation.

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Icom IC-F21 Specifications

General IconGeneral
BrandIcom
ModelIC-F21
CategoryTransceiver
LanguageEnglish

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