Yaesu FT-990

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An FT-990 tuned to one of W1AW's regular morse code (CW) bulletins on 7.0475 MHz

Yaesu FT-990 is a model line of amateur radio transceiver manufactured by the Yaesu Corporation in Japan from 1991 to 1999[1] It is a descendant of and shares many features with the Yaesu FT-1000. An expedition in 2009 by radio amateurs with callsign FT5GA[2] to the Glorioso Islands, in the Indian Ocean near Madagascar, made use of two FT-990's despite each radio being more than ten years old. FT-990's have knobs and buttons, versus menu driven interfaces of some newer transceivers.

Description[edit]

The Yaesu FT-990 is a solid state transceiver with the following features:[3]

General[edit]

  • General coverage receiver, tunes continuously from 100 kHz to 30 MHz
  • Modes: AM, USB, LSB, CW, FM, FSK
  • Controlled internally by six microprocessors
  • Modular construction using removable epoxy boards
  • Built-in switching AC power supply (115 V @ 8A or 230 V @ 4A)
  • 90 memories, each one remembers frequency, mode and bandwidth
  • Iambic CW keyer
  • Multi-function illuminated analog S-meter
  • Computer Aided Transceiver (CAT) allows computer control via a serial cable with a DIN jack
  • Notch filter, IF shift, noise blanker, and a digitally switched capacity audio filter
  • Independent receiver incremental tuning ("RIT") and transmitter incremental tuning ("XIT")
  • Two independent VFOs to support split operation

Transmitter[edit]

  • Supported amateur bands (meters): 160, 80, 40, 30, 20, 17, 15, 12, and 10
  • 100 Watts, adjustable from 10W to 100W; up to 25W in AM mode
  • RF Speech Processor
  • Automatic antenna tuner

Receiver[edit]

Triple-conversion superheterodyne with IF frequencies of 47.21 MHz, 10.94 MHz and 455 kHz

Sensitivity

  • SSB and CW: < 0.25 μV (1.8 - 30 MHz)
  • AM: < 1 μV (1.8 - 30 MHz)

Selectivity (-6 dB down)

  • No button selected: 6.0 kHz
  • 2.4 kHz button: 2.2 kHz (all modes except FM)
  • 2.0 kHz button: 1.8 kHz (all modes except AM and FM)
  • 500 Hz button: 500 Hz (CW, RTTY, Packet)
  • 250 Hz button: 240 Hz (CW, RTTY)


Note: the 250 Hz CW bandwidth and the 2.0 kHz SSB bandwidth require installation of optional 8-pole crystal filters.

Pricing[edit]

When new in 1991, the FT-990 had an MSRP list price of $2399.[4]

Model Variations[edit]

ROM Versions. Earlier models have non-volatile ROM memory installed with software version 1.2, while later models have version 1.3. The software cannot be upgraded by the user and requires a new ROM chip. The chips have been discontinued by Yaesu and are not available.

DC Version. FT-990's were made in an "AC version" (with power supply) and a "DC version" (no power supply).

References[edit]

  1. ^ RigPix Database.
  2. ^ FT5GA, "Glorieuses 2009"
  3. ^ FT-990 Operating Manual, Yaesu Musen Co., Ltd., Tokyo, Japan.
  4. ^ QST, QST Magazine Product Review, November 1991, pg. 47-50.

External links[edit]