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Last modified 2023-09-19

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Icom IC-21

A picture of Icom IC-21


Type:Amateur VHF transceiver
Frequency range: TX: 144-148 MHz
RX: 144-148 MHz
Tuning steps:Channelized
Frequency stability:Max ? ppm
Channels / memory management: 24 regular. XTAL-controlled
18 MHz XTALs for TX and 14 MHz XTALs for RX
Repeater shift / offset:According to XTALs
Power supply:Mains: 117 VAC 10% (100/117/200/220/234 VAC with IC-21X transformer)
or 13.5 VDC 10%
Current drain / power consumption:RX: 200 mA (Average)
TX: 1.2-2.1 A
Antenna impedance / connector:50 ohm / SO-239
Dimensions (W*H*D):230*111*260 mm (9.06*4.37*10.24")
Weight:6 Kg (13.23 lb)
Other features:RIT. Center meter and SWR-meter.

Receiver system: Double conversion superheterodyne
1st IF: 10.7 MHz
2nd IF: 455 KHz
Sensitivity:0.4 uV (20 dB quieting)
Selectivity:30 KHz (-6 dB)
50 KHz (-50 dB)
Image rejection:
AF output power / speaker:1.5 W at ?% distortion / 8 ohm
External speaker connector:Yes, 8 ohm

RF output power:

2 m:10 W1 W
Modulation system:Variable reactance phase modulation
Max FM deviation (Factory set):? KHz
Spurious emissions:Better than -? dB
Microphone impedance / connector:10 Kohm / 3-pin (Metal locking ring connector)
Microphone input level:? mV

Manufactured:Japan, 1971-197x (Discontinued)
Additional info:New price 1971 in the US: $389.00
Related documents:User manual (3.8 MB)
Modifications and fixes:
Options / Accessories:
? External VFO