Icom IC-251A Instruction Manual page 3

SECTION | SPECIFICATIONS
GENERAL
Numbers of semi-conductors
Frequency coverage
Frequency resolution
Frequency Control
Frequency Readout
Frequency stability
Memory channels
Usable conditions
Antenna impedance
Power supply requirement
Current drain (at 13.8V DC)
Dimensions
Weight
TRANSMITTER
Output power
Emission mode
Modulation system
Max. frequency deviation
Spurious emission
Carrier Suppression
Unwanted Sideband
Microphone
Operating mode
Tone Burst
Transistor 99
FET 12
Ic 36 (IC-251A : 35)
Diode 133 (IC-251A : 132)
144.0000 ~ 145.9999MHz
(1C-251A : 143.8000 ~ 148.1999MHz)
SSB 100Hz steps FM 5KHz steps
1KHz steps with TS button depressed
Microcomputer based 100Hz step Digital PLL synthesizer.
Independent Transmit-Receive Frequency Capability.
7 digit Luminescent display 100Hz readout.
Within +1.5KHz
3 channels, any inband frequency programmable
Temperature: —10°C ~ 60°C (14°F ~ 140°F)
Operationable time: Continuous
50 ohms unbalanced
13.8V DC +15% (negative ground) 3A Max. or 117V/240V
AC +10%
Transmitting
SSB (PEP 10W) Approx. 2.3A
CW, FM (10W) Approx. 2.3A
FM (1W) Approx. 1.0A
Receiving
At max, audio output Approx. 0.6A
Squelched Approx. 0.4A
111mm (H) x 241mm (W) x 264mm (D)
Approx. 5.0 Kgs
SSB 10W (PEP)
CW 10W
FM 1 ~ 10W (Adjustable)
SSB (A3J, USB/LSB), CW (A1), FM (F3)
SSB Balanced modulation
FM Variable reactance frequency modulation
+5KHz
More than 60dB below peak power output
More than 40dB below peak power output
More than 40dB down at 1000Hz AF input
1.3K ohm dynamic microphone with built-in preamplifier
and push-to-talk switch.
Simplex, Duplex
(Any inband frequency separation programmable)
1750Hz +0.1Hz (1C-251A : Not installed)