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Last modified 2021-03-24

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Icom IC-251A

A picture of Icom IC-251A

SPECIFICATIONS

GENERAL
Type:Amateur VHF transceiver
Frequency range:TX: 143.800-148.200 MHz (USA)
RX: 143.800-148.200 MHz
Tuning steps:100 Hz, 1 / 5 KHz
Frequency stability:Less than 1.5 KHz @ -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 / 240 VAC (3-pin IEC C14 connector)
or 13.8 VDC 15%
Current drain/power consumption:RX: Max 600 mA
TX: Max 2.3 A
Antenna impedance/connector:50 ohm / SO-239
Dimensions (W*H*D):241*111*264 mm (9.5*4.4*10.4")
Weight:5 Kg (11 lb)
Other features:NB. SWR-meter.




RECEIVER SECTION
Receiver system: Single conversion superheterodyne (SSB/CW)
IF: 10.7 MHz
Double conversion superheterodyne (FM)
1st IF: 10.7 MHz
2nd IF: 455 KHz
Sensitivity:SSB/CW: Better than 0.5 uV (10 dB S+N/N)
FM: Better than 0.6 uV for 20 dB noise quieting
Selectivity:SSB/CW: 2.4 KHz (-6 dB), 4.8 KHz (-60 dB)
FM: 15 KHz (-6 dB), 30 KHz (-60 dB)
Image rejection:More than 60 dB
AF output power/speaker:1.5 W at ?% distortion / 8 ohm
External speaker connector:3.5 mm




TRANSMITTER SECTION
RF output power: FM: 1-10 W
SSB: 10 W (PEP)
CW: 10 W
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 (7.4 MB)
RF final: 2SC2094
Modifications and fixes:
Reviews:
Options/Accessories:
IC-EX1
IC-EX2
IC-HM8
IC-HM10
IC-HP1
IC-MB5
IC-SM5
IC-SP2
Extension terminal
Extension terminal with 25 KHz marker
Hand microphone with DTMF keypad
Hand microphone with scanning
Headphones
Mobile mounting bracket
Desk microphone
External speaker
A rear picture of Icom IC-251A