Specifications

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14 / 86 28.8.2007 13:16
Selectivity: 6/2.1/_/_ kHz -6dB. [12 FM]
Circuit: Triple Conversion
Physical: 9.5x3.7x9.1" 6.8 Lbs.
Coverage: 30-60000 kHz Readout: Digital LCD 0.001
Features: ¼" Head. Jack, . S-Indicator . RF Gain . Clock-Timer . Preamp . Attenuator . 99 Mems (F/M) . 2 Band
Edge Memories . Squelch . Keypad . NB . AGC FAST/SLOW/OFF . Twin PBT . Synchronous Detection .
Scan/Sweep . Lock
Accessories: FL-52A 500 Hz CW Filter, FL-100 500 Hz CW Filter, FL-101 250 Hz CW Filter, FL-53A 250
Hz CW Filter, FL-103 2.8 kHz SSB Filter, FL-223 1.9 kHz SSB Filter, FL-96 2.8 kHz SSB Filter, FL-222 1.8
kHz SSB Filter, FL-257 3.3 kHz SSB Filter, UT-106 Audio DSP Notch/NR Option, RS-R75 Control Software,
CR-282 High Stability, UT-102 Voice Synthesizer, CT-17 Level Converter, MB-23 Carry Handle, MB-5
Mobile Bracket New Price: $549-699 Used Price: $350-400
Comments: Memories are 8 character alphanumeric. Only one filter per IF may be added. The Sync detection
does not hold lock well on weak signals.
The ICOM IC-R75 receiver continues the proud tradition of the earlier R-70 and R-71A models. With full
coverage from 30 kHz to 60 MHz; all longwave, medium wave and shortwave frequencies are supported plus
extended coverage to include the 6 meter amateur band. Some of innovative features of the R75 include:
Synchronous AM Detection, FM Mode Detection (but not the FM broadcast band), Twin Passband Tuning,
Two Level Preamp, 99 Alphanumeric Memories, four Scan Modes, Noise Blanker, Selectable AGC
(FAST/SLOW/OFF), Clock-Timer, Squelch, Attenuator and backlit LCD display. Tuning my be selected at 1
Hz or 10 Hz steps plus there is a 1 MHz quick tuning step plus tuning Lock. The R75 exhibits very impressive
and very linear sensitivity throughout shortwave. Superior dynamic range insures the handling of both weak and
strong signals. The front-firing speaker provides solid, clear audio. The back panel includes a Record Output
jack and Tape Recorder Activation jack (both 3.5mm mini). The R75 includes the Icom AD55A external 120
VAC 60 Hz to 16 VDC 1.5 Amp power supply adapter.
The R75 is an excellent single sideband receiver (SSB). The supplied 2.1 kHz SSB filter is suitable for utility,
amateur, or broadcast SSB. However, two optional CW/SSB filter positions are also available (one per I.F.).
Click here to view filter chart.
* Intermediate frequencies:
Mode 1st (MHz) 2nd (MHz) 3rd (kHz)
USB/LSB* 69.0115 9.0115 455
CW* 69.0106 9.0106 455.9
RTTY* 69.0105 9.0105 456
AM*/S-AM 69.0100 9.0100 450
FM 69.0115 9.0115 450
*May differ according to selected IF filter.
* Sensitivity:
Frequency Range SSB/CW/RTTY AM/S-AM FM
0.1 - 1.8 MHz (Preamp OFF) 2.0 µV 5.6 µV -
1.8 - 28 MHz (Preamp 1 ON) 0.16 µV 1.60 µV -
28 - 29.99 MHz (Preamp 1 ON) 0.16 µV 1.60 µV 0.22 µV
50 - 54 MHz (Preamp 2 ON) 0.13 µV 1.00 µV 0.20 µV
* SQL sensitivity (threshold):
o SSB, CW, RTTY: Less than 5.6 µV (Preamp 1 ON)
o FM: Less than 0.32 µV (Preamp 2 ON)
* Selectivity:
o SSB, CW, RTTY: More than 2.1 kHz/-6dB, Less than 4.0 kHz/-60dB
o AM, S-AM: More than 6 kHz/-6dB, Less than 20 kHz/-60dB FM:
More than 12 kHz/-6dB, Less than 30 kHz/-60dB
* Spurious and image rejection ratio: More than 70 dB
(except IF through/50 MHz band)
* Audio Output Power (at 13.8 V DC): More than 2.0 W at
10% distortion with an 8 load
* PHONES connector: 3-conductor 6.35 (d) mm (1/4")
* External SP connector: 2-conductor 3.5 mm (1/8 in)/4-8
The magazine QST measured the sensitivity and got these results: