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RX Icom MODs →
communications receiver
- this page is a stub
IC-R9000 was a communications receiver,
introduced around 1989 by
Icom
in Osaka (Japan) for use in profesional applications, such
as frequency spectrum monitoring. Given the professional specifications
and the reasonable price tag, it was an attractive alternative to
the expensive high-end surveillance receivers
from other manufacturers
like Rohde & Schwarz
and Telefunken.
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The receiver has the other dimensions of a 19" rackmountable case and
is quite heavy. It has a clear front panel with the regular adjustment
and readouts at the left, a cathode ray tube (CRT)
screen at the centre and a keypad at the right.
Below the CRT screen are button and indicators for a number of special
features, some of which are menu-driven. Immediately to the right of the
CRT is a row of push-buttons for selection of the required modulation type (MODE). The R-9000 is cable of receiving AM, FM, LSB, USB CW and FSK signals,
with wide, middle or narrow bandwidth.
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In the Netherlands, the IC-R9000 was used by the
Radio Monitoring Service (RCD, AT)
as part of the PAN-2000 mobile intercept system
that was introduced
in the mid-1990s. For that purpose, the IC-R9000 was
modified and improved
at several points, mainly to reduce spurious signals.
The IC-R9000 was introduced in 1989 for ~ EUR 4500,
and was in production for more than 15 years. In 1999 it was replaced by the nearly
identical IC-R9000L which featured an LCD display instead of the amber CRT.
The L-version was in production until 2006, when it was succeeded by the much
improved IC-R9500. The latter has an extended frequency
range to 3000 MHz (3 GHz).
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Below is an overview of the controls at the front panel of the IC-R9000.
At the left are the regular adjustments for volume, squelch, RF gain, etc.
At the top is a large illuminated signal strength indicator (S-meter), which
can also be used as a discriminator tuning indicator (CENTER meter).
At the center is a xx inch monochrome (amber) cathode ray tube (CRT) monitor
that is used for displaying menu options and the spectrum scope. It can be
turned off when it isn't needed – preventing it from burning in – and its
brightness can be adjusted with a recessed knob along the bottom row of the
front panel. Below the monitor are several buttons for selecting the menu
options and for controlling some special features, such as AFC, attenuator
and the display itself.
To the right of the monitor is a numeric keypad plus a column of buttons to
select the desired modulation type. Below the keypad is a large rotary dial
that can be used to adjust the frequency. At the far right are additional
features, such as filter selection and memory bank selection.
The diagram above provides a quick overview of the most important connections
at the rear of the receiver. At the far left is the mains socket, with a fuse
to its right. To the right of the power supply unit (PSU) is a socket for
powering the device with a 13.5V DC source. Note that 12V DC is not
enough and that the red jumper wire must be installed when powering
the device from the mains. At the far right are three antenna sockets for
the corresponding three frequency ranges.
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When used as part of the PAN-2000 intercept receiver, the
Dutch Radio Monitoring Service (RCD) made a number of changes to the
IC-R-9000. Below is a non-exhaustive list of known changes:
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- Mains PSU removed to reduce weight
- Discriminator output added
- Various CINCH sockets replaced by BNC sockets (to make it more robust)
- AGC disabled
- Fixed gain adjusted for 1st IF stage
- Video monitor disabled (to save power)
- IF route changed
- IF filter characteristics changed
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Device Communication receiver Purpose Radio monitoring, amateur radio reception Model IC-R9000 Manufacturer Icom Year 1989 Country Japan Successor IC-R9500 Frequency 100 kHz — 2000 MHz (1 GHz) Modes AM, NBFM, WBFM, SSB (LSB/USB), CW, FSK Memories 1000 Power Mains (90—240V AC), or 13.8V DC Current 3A @ 15V DC Dimensions 424 x 365 x 150 mm Weight 20 kg
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© Crypto Museum. Created: Thursday 12 July 2018. Last changed: Friday, 22 August 2025 - 14:13 CET.
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