View source for Icom IC-375A

ICOM IC-375A 220-MHz Multimode Transceiver

*Manufactured: Japan (Discontinued)

[[File:IcomIC-37A_500w.jpg]]

It's finally happened. The diehard 220 enthusiasts can now rejoice and
revel in ICOM's latest entry into the VHF/UHF multimode market: The
IC-375A transceiver. It's made exclusively for the North American
amateur market.

Similar in design and operation to the IC-275 and IC-475, this radio
offers a wealth of features for everyone, from the casual FM operator to
hard-core packeteers. Considering this is the first time any company has
manufactured such a transceiver, one has to be impressed with the
sophistication of the design.

==Overview==

The front panel. Note the virtually identical copy of its sister
transceivers for 2m and 70cm. The bright, backlit amber LCD display
jumps out, showing frequency, VFO_t memory channel, RIT, tone squelch,
duplex offset, and mode. The frequency selection dial sits beneath the
display, and has silky-smooth operation over a variety of tuning increments.

==Modes==

The 375 has four modes: FM. LSB, USB and CW, Pushing the CW mode switch
again enables the optional CW filter (500 Hz)_r which the operator can
use in conjunction with the Passband Tuning (PBT) and Notch controls for
enhanced selectivity Provision is made to switch a tower-mounted
preamplifier from the front panel (maximum power: 100 watts) as well as
to enable a built-in speech compressor. There are also two speeds of AGC
selection.

The user can select sub-tone frequencies on both receive and transmit,
and store any combination of offsets, sub-tones, modes and frequencies
in 99 seperate memory channelsâ€”more than adequate for everyday use. Two
priority channels are also available which store similar data.

RIT (Receiver Incremental Tuning) is standard and permits a shift of up
to 9.9 kHz either side of the displayed frequency. The RIT can be
cleared to zero offset at the touch of a button. This feature works in
all modes, including FM.

Additional controls set up the microphone gain (not deviation), RF
output power, RF gain, CW keying delay, meter display, and AF tone
quality from the built-in speaker. The AF gain and squelch controls are
located to the right ol the display meter, directly below the main power
switch, in order not to confuse them with any other controls.

Several scan rates are available. The standard band scan is
incorporated, along with programmable range scanning, se~ lectable mode
scanning through memories, and general purpose memory scanning A skip
button allows the operator to lock out undesired channels when in scan
mode. When using the programmable scan function, transmitting or
touching the main tuning dial erases the preprogrammed band limits.

As on all new ICOM muftimod-es. the 375 has full break-in keying (QSK).
Current activity levels are presently too low for QSK to be really
useful now. In many cases also, full break-in keying isn't usable due to
sequenced switching of amplifiers and external preamplifiers. The
optional AG-30 mast-mounted preamplifier won't function when full QSK is
selected either Semi break-in is also available with the drop-out delay
set from the front panel. Note that no VOX operation is availableâ€”none
of the new 75 series transceivers offer it.

The DATA switch on the 275**and 475 is also available here. ICOM claims
a switching time of less than 5 milliseconds, which should be ideal for
packet operation. Packeteers will not be able to use an external
amplifier or preamplifier, however, due to this rapid switch time. The
IC-375 also runs AMTOR. conventional AFSK RTTY, and SSTV.

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[[Category:Radio]]
[[Category:Ham Radio]]
[[Category:2-Way Radio]]
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[[Category:Transceiver]]