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Last modified 2021-03-25

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Icom IC-451A

A picture of Icom IC-451A

SPECIFICATIONS

GENERAL
Type:Amateur UHF transceiver
Frequency range:TX: 430-440 MHz (USA)
RX: 430-440 MHz
Tuning steps:100 Hz, 1 / 5 KHz
Frequency stability:0.001% @ -10 to +60C (14 to 140F)
Mode:FM / SSB / CW
Channels/memory management: 3 regular
Repeater shift/offset:No dedicated. Use VFO A/B split
Power supply:Mains: 117 VAC 10%
or 13.8 VDC 15%
Current drain/power consumption:RX: 600 to 800 mA
TX: Max 3.5 A
Antenna impedance/connector:50 ohm / N-jack
Dimensions (W*H*D):241*111*264 mm (9.5*4.37*10.4")
Weight:7.2 Kg (15.9 lb)
Other features:NB. VOX.




RECEIVER SECTION
Receiver system: Double conversion superheterodyne (SSB/CW)
1st IF: 39.38 MHz
2nd IF: 10.75 MHz
Triple conversion superheterodyne (FM)
1st IF: 39.38 MHz
2nd IF: 10.75 MHz
3rd IF: 455 KHz
Sensitivity: FM: 0.6 uV (20 dB noise quieting)
SSB/CW: 0.5 uV (10 dB S+N/N)
Selectivity: FM: 15 KHz (-6 dB), 30 KHz (-60 dB)
SSB/CW: 2.4 KHz (-6 dB), 4.8 KHz (-60 dB)
Image rejection:
AF output power/speaker:2 W at ?% distortion / 8 ohm
External speaker connector:3.5 mm




TRANSMITTER SECTION
RF output power: 1-10 W adjustable
Modulation system:FM: Variable reactance
SSB: Balanced
Max FM deviation:5 KHz
Spurious emissions:Less than -60 dB
Microphone impedance/connector:1.3 Kohm / 8-pin (Metal locking ring connector)
Microphone input sensitivity:? mV




MISCELLANEOUS
Manufactured:Japan, 1980-198x (Discontinued)
Additional info:
Related documents:User manual (5.9 MB)
Modifications and fixes:
Reviews:
Options/Accessories:
IC-EX1
IC-EX2
IC-HM10
IC-HP1
IC-MB5
IC-SM5
IC-SP2
Extension terminal
Extension terminal with 25 KHz marker
Hand microphone with scanning
Headphones
Mobile mounting bracket
Desk microphone
External speaker