ICOM IC-718 HF All Band Transceiver The Origin of the HF Transceiver
The IC-718 is equipped with a minimum number of buttons and controls for simple feature selection. The 10-key pad on the front panel allows direct entry of an operating frequency or a memory channel number. The auto tuning step function is activated when turning the dial quickly and helps speed up tuning. The band stacking register is convenient when changing operating bands.
features
Built-in electronic keyer
Built-in microphone compressor
Combined squelch and RF gain control
Preamplifier and attenuator
101 memory channels
CW full break-in
IF shift interference rejection
1Hz tuning
VOX function for hands-free operation
Optional automatic antenna tuner
Digital S/RF meter
Front mounted loud speaker
The IC-718 has a speaker mounted on the front panel. With the speaker facing the operator, audio sounds can be clearly heard without impediment during operation. It is no longer necessary to manually increase the volume to try and capture audio sounds.
Superior basic performance
The IC-718 has MHz* general coverage receive capability. A 4-element system is employed for the 1st receive mixer, providing superior receive IMD, especially from in-band near-by interfering signals. A well-designed double-conversion system to help minimize image and spurious responses for better signal fidelity, is also built-in. A newly designed PLL circuit has been adopted to improve C/N ratio characteristics. The combination of the 4-element system mixer and new PLL circuit allows superior basic performance as that of a commercial grade transceiver.
DSP capability*
The DSP includes the following to give you superior receiver quality in your shack, vehicle or during DX'pedition.
Noise reduction:
Pulls desired AF signals from noise. Outstanding S/N ratio is achieved, providing clean audio in SSB, AM and FM.
Automatic Notch filter:
This automatically minimizes beat signals and heterodynes while preserving the receive signal. Also, the notch frequency is automatically adjusted to follow interfering beat signals - for example, reducing interference from RTTY signals during SSB operation.
Interference rejection - IF shift
To reject interference, the IC-718 has an IF shift function which shifts the center frequency of the IF passband electronically to reduce adjacent interference.
Microphone compressor
This feature compresses microphone audio input to increase average audio output level. The result is, that talk power is increased. The compression level is adjustable for your preference. This function is effective for long distance communication, or when propagation conditions are poor.
RF gain control
RF gain control is combined with the squelch control. The RF gain adjusts minimum response receiver gain, and ignores signals weaker than the pre-set level - providing pleasant stand-by, or scanning.
Ample CW features
An electronic keyer with a variable dot/dash ratio (2.8:1 to 4.8:1) control is built-in. By simply connecting a paddle, easy CW operation can be made. The CW pitch and the key speed are also variable from 300-900 Hz, 6-60 wpm, respectively. Of course, full break-in capability is available with the adjustable break-in delay.
VOX operation
A VOX (Voice operated transmission) is included with the IC-718. It provides handsfree operation by detecting audio signals from the microphone. It' s easy! Flexible filter selection
Flexible Filter Selection
An optional IF filter can be installed into the transceiver to suit your operating preference.
High frequency stability
When the optional CR-338 HIGH STABILITY CRYSTAL UNIT is installed, you get a very high frequency stability of 0.5 ppm.
Selectable antenna tuner
Either the optional antenna tuner unit, AT-180 or AH-4 can be used with the IC-718 to suit your installing conditions, or operating style. Of course, the AH-4 control circuit is built into the IC-718.
Simple operation
The IC-718 is equipped with a minimum number of switches and controls for superior feature selectability. The 10-key pad on the front panel for entering directly an operating frequency, or a memory channel number. The auto tuning steps function helps quick tuning is activate when turning the dial quickly. And the band stacking register is very convenient when changing operating bands.
Digital S/RF meter
Built-in multi functional digital S/RF meter indicates signal strength level while receiving, and either transmit output power, ALC level or VSWR ratio while transmitting.
Optional voice synthesizer
A clear, electronically-generated voice announces operating frequency, mode and receiving signal strength level when the optional voice synthesizer unit, UT-102, is installed.
General
Frequency coverage
(Differs according to version) Tx:
1.8, 3.5, 7, 10, 14, 18, 21, 24, 28MHz bands
Rx:
30kHz29.999MHz*1
Modes USB, LSB, CW, RTTY, AM
Frequency stability Less than 200Hz
(From 1 min. to 60 min. after power ON)
Maximum current drain 20A at 13.8V DC
Power supply requirement 13.8V DC 15%
Antenna connector SO-239 (50)
Number of memory
channels 101
(99 regular, 2 scan edges)
Dimensions
(WHD; Projections
are not included) mm;
9.453.749.41 in
Weight (approx.) 3.8kg; 8.4lb
*1 Guaranteed range 0.529.999MHz.
Transmitter
Output power SSB, CW, RTTY:
2100W
AM:
235W
Spurious emissions Less than 50dB
Carrier suppression More than 40dB
Unwanted sideband More than 50dB
Microphone connector 8-pin connector (600)
Receiver
Sensitivity (typical)
Preamp ON SSB, CW, RTTY, AM: at 10dB S/N FM, WFM: at 12dB SINAD SSB, CW, RTTY:
1.829.999MHz 0.16V
AM:
0.51.799MHz 13V
1.829.999MHz 2.0V
Selectivity SSB, CW, RTTY:
2.1kHz/6dB
4.5kHz/60dB
AM:
6.0kHz/6dB
20kHz/40dB
Spurious and image
rejection More than 70dB
(1.829.999MHz)
AF power
(at 10% distortion with an 8 load) More than 2.0W
External speaker
connector 2-conductor 3.5 (d) mm (18)/8