iCOM IC-R75 HF+50MHz All Mode Communication Receiver User Guide

: June 3, 2024
: ICOM

Table of Contents

IC-R75 HF+50MHz All Mode Communication Receiver
SPECIFICATIONS
OPTIONS
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

HF+50 MHz ALL MODE COMMUNICATIONS RECEIVER
IC-R75

IC-R75 HF+50MHz All Mode Communication Receiver

iCOM IC R75 HF 50MHz All Mode Communication Receiver Icom Inc. WIDE FREQUENCY COVERAGE AND INNOVATIVE FEATURES

The IC-R75 covers a wide frequency range from 0.03 to 60 MHz allowing you to listen in to a world of information. With innovative features such as twin passband tuning, DSP capabilities, remote PC control, and more — shortwave listening is easier than ever. All this comes in a compact, lightweight package that can be conveniently used in your ham shack, den, or vehicle.

Expanded frequency coverage
The IC-R75 covers a frequency range that’s wider than other HF receivers;
0.03–60.000000 MHz. This wide frequency coverage allows you to listen to a variety of communications including marine communications, amateur radio, short-wave radio broadcasts, and more.
Guaranteed 0.1–29.99 MHz and 50–54 MHz only

High-stability receiver circuit
Icom’s latest wideband technology provides highly stable receive sensitivity over the entire receive frequency range.
The IC-R75 makes it easy to catch communications worldwide.

iCOM IC R75 HF 50MHz All Mode Communication Receiver - characteristics
example

Superior dynamic range
A wide dynamic range of more than 100 dB 1, 104.5 dB 2 for the 14 MHz bands, 102.5 dB 2 for the 50 MHz bands, and a well-designed triple conversion system help minimize image and spurious responses for better signal ﬁdelity. 1
Not guaranteed. * 2 Not guaranteed; When PREAMP OFF; CW narrow 500 Hz bandwidth; 100 kHz channel spacing

• Dynamic range characteristics example iCOM IC R75 HF 50MHz All Mode
Communication Receiver - Dynamic range

Twin PBT capability
The PBT (passband tuning) function narrows and moves the IF passband at two stages to efficiently eliminate interfering signals. iCOM IC R75 HF 50MHz All
Mode Communication Receiver - PBT operation

DSP capabilities
DSP (Digital Signal Processor) ﬁltering in the AF stage is available with the optional UT106 DSP UNIT. The DSP provides the following functions: Already installed with some versions.

Noise reduction:
Pulls desired AF signals from noise. An outstanding S/N ratio is achieved, providing clean audio in SSB, AM, and FM. Pull weak signals right out of the noise.

Comparison of receive signal speaker output iCOM IC R75 HF 50MHz All
Mode Communication Receiver - DSP capabilities

Automatic Notch ﬁlter:
This automatically minimizes beat signals and protects the received signal. Also, the notch frequency is automatically adjusted to follow interfering beat signals—reducing interference from RTTY signals during SSB operation for example.

FM mode standard
Unlike many other HF/50 MHz receivers there is no need to install an additional unit for FM mode reception on the 29 and 50 MHz bands.

Flexible ﬁlter selection
Up to two optional ﬁlters can be installed, providing flexible band width selection and ﬁlter combinations.
One each for 9 MHz and 455 kHz IF stage.

| 1st IF 9 MHz stage| 2nd IF 455 kHz stage
---|---|---
SSB| FL-103 (2.8 kHz)
FL-223 (1.9 kHz)| FL-222 (1.8 kHz)
FL-257 (3.3 kHz)
CW/RTTY| FL-100 (500 Hz)
FL-101 (250 Hz)
FL-232 (350 Hz)| FL-52A (500 Hz)
FL-53A (250 Hz)

iCOM IC R75 HF 50MHz All Mode Communication Receiver - filter
selection

Alphanumeric readout
The function display has an alphanumeric readout that indicates up to 8-character memory names for easy recognition.
Selectable RF gain/squelch control
The RF gain and/or squelch control can be set to the [SQL] control in set mode to match your operating preference.
Other outstanding features…

Compact body
Digital bar S-meter with peak hold
Front-mounted speaker for easy listening
Internal clock with ON/OFF, sleep timer
Numeric keypad for direct frequency or memory channel input
Attenuator
2-level preamp
Selectable AGC (FAST/SLOW/OFF)
Noise blanker
99 memories plus 2 program scan edges
Ample scanning functions are available
CW pitch control and CW reverse mode and more…

Rear panel view iCOM IC R75 HF 50MHz All Mode Communication Receiver -
Rear pane iCOM IC R75 HF 50MHz All
Mode Communication Receiver - Optional PC remote control

HF+50 MHz ALL MODE COMMUNICATIONS RECEIVER

SPECIFICATIONS

GENERAL

Frequency coverage: 0.03–60.000000 MHz
0.03–29.999999 MHz only for Asia version; specifications guaranteed 0.1–29.99 MHz and 50–54 MHz only
Mode : USB, LSB, CW, RTTY, AM, FM
Number of memory channels: 101 (99 regulars, 2 scan edges)
Frequency stability : Less than ±7 ppm from 1 min. to 60 min. after power on. After that rate of stability less than ±1 ppm/hr. at +25°C (+77°F). Temperature ﬂuctuations
0°C to +50°C (+32°F to +122°F) less than ±5 ppm.
Power supply requirement: 13.8 V DC ±15% (negative ground)
Current drain (at 13.8 V DC): Standby 0.9 A Max. audio 1.1 A
Antenna connector: SO-239 (50 Ω), push connection terminal (500 Ω)
Dimensions: 241(W) × 94(H) × 229(D) mm (projections not included) 9 ⁄2(W) × 3 ⁄16(H) × 9 ⁄32(D) in
Weight (approx.) : 3.0 kg; 6 lb 10 oz
REMOTE connector: RS-232C D-sub 9-pin
CI-V connector : 2-conductor 3.5 (d) mm ( 1 ⁄8˝)

RECEIVER

Receive system : Triple-conversion superheterodyne system
Intermediate frequencies :
Mode| 1st (MHz)| 2nd (MHz)| 3rd (kHz)
---|---|---|---
USB/LSB CW| 69.0115| 9.0115| 455
Cw| 69.0106| 9.0106| 455.9
RTTY| 69.0105| 9.0105| 456
AM*| 69.01| 9.01| 450
FM| 69.0115| 9.0115| 450

***** May differ according to selected IF ﬁlter.

Sensitivity
Frequency range| SSB/CW/RTTY 10 dB S/N| AM10dB S/N| FM12dB SINAD
---|---|---|---
0.1–1.8 MHz1| 2.0 µV| 5.6 µV| —
1.8–28 MHz2| 0.16 µV| 1.6 µV| —
28–29.99 MHz2| 0.16 µV| 1.6 µV| 0.22 µV
50–54 MHz3| 0.13 µV| 1.0 µV| 0.2 µV
1 Preamp: OFF; 2 Preamp 1: ON; 3Preamp 2: ON
- SQL sensitivity (threshold) : SSB, CW, RTTY Less than 5.6 µV FM Less than 0.32 µV 2 1 Preamp 1: ON; 2 preamp 2: ON
- Selectivity: SSB, CW, RTTY More than 2.1 kHz/–6 dB
  Less than 4.0 kHz/–60 dB
  AM More than 6 kHz/–6 dB Less than 20 kHz/–50 dB
  FM More than 12 kHz/–6 dB Less than 30 kHz/–40 dB
- Spurious and image rejection ratio: More than 70 dB (except IF through/50 MHz band)
- Audio output power: More than 2.0 W at 10% distortion with an 8 Ω load (at 13.8 V DC)
- PHONES connector: 3-conductor 6.35 (d) mm ( 1 ⁄4˝)
- External SP connector : 2-conductor 3.5 (d) mm ( 1 ⁄8˝)/8 Ω

The IC-R75 has been tested to and passed the MIL-STD requirements and strict environmental standards for shock (MIL 810C, D, E) and vibration (MIL 810C, D, E). Supplied accessories: • AC adapter or DC power cable (depending on the version) • Spare fuse
All stated speciﬁcations are typical and subject to change without notice or obligations.

OPTIONS

iCOM IC R75 HF 50MHz All Mode Communication Receiver - CRYSTAL
UNIT

CR-282 HIGH-STABILITY CRYSTAL UNIT Contains a temperature-compensating oven heater and crystal unit for improved frequency stability. Frequency stability: ±0.5 ppm
iCOM IC R75 HF 50MHz All Mode Communication Receiver - VOICE
SYNTHESIZER UT-102 VOICE SYNTHESIZER Announces the operating mode, frequency, signal strength level and time.

UT-106 DSP UNIT Provides AF DSP functions such as noise reduction and auto notch. Already installed with some versions.
iCOM IC R75 HF 50MHz All Mode Communication Receiver - LEVEL
CONVERTER CT-17 CI-V LEVEL CONVERTER For remote receiver control using a PC equipped with an RS- 232C port.
RS-R75 REMOTE CONTROL
SOFTWARE
Supplied items;

Application CD-ROM
RS-232C serial interface cable Allows you to control the receiver from your PC (for Microsoft ® Win- dows ® 95 or Windows ® 98). Microsoft and Windows are registered trademarks of Microsoft Corporation.

9 MHz ﬁlters
FL-100 CW/RTTY narrow; 500 Hz/–6 dB
FL-101 CW narrow; 250 Hz/–6 dB
FL-103 SSB wide; 2.8 kHz/–6 dB
FL-223 SSB narrow; 1.9 kHz/–6 dB
FL-232 CW/RTTY narrow; 350 Hz/–6 dB iCOM IC R75 HF 50MHz All Mode
Communication Receiver - kHz filters

455 kHz ﬁlters
FL-52A CW/RTTY narrow; 500 Hz/–6 dB
FL-53A CW narrow; 250 Hz/–6 dB
FL-222 SSB narrow; 1.8 kHz/–6 dB
FL-257 SSB wide; 3.3 kHz/–6 dB
IC-MB5 MOBILE BRACKET Communications receiver bracket for mobile operation.
MB-23 CARRYING HANDLE
For easy portable operation.
AD-55/A/V AC DAPTER
Allows you to power the receiver via domestic AC.

Icom America Inc.
2380 116th Avenue NE,
Bellevue, WA 98004, U.S.A.
Phone : +1 425-454-8155
Fax : +1 425-454-1509
E-mail : sales@lcomamerIca.com
URL : http://Arevw.loomamerIca.com
Icom (UK) Ltd.
Unit 9, Sea St., Herne Bay,
Kent, CT6 OLD, U.K.
Phone : +44 (01227) 741741
Fax : +44 (01227) 741742
E-mail :Info@lcomuk.co.uk
URL : http://Awiwicomuk.co.uk
Asia Icom Inc.
6F No. 68, Sec. 1 Cheng-Teh Road,
Taipei, Taiwan, R.O.C.
Phone : +886 (02) 2559 1899
Fax: +886 (02) 2559 1874
E-mail : sales@asia-icom.com
URL: http://www.asia-icom.com
Icom Inc.
1-1-32, Kami-minami, Hirano-ku, Osaka 547-0003, Japan
Phone: +81 (06) 6793 5302
Fax: +81 (06) 6793 0013
URL: http://www.icom.co.jp/world/index.html