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Yaesu FT-990 Manual

Yaesu FT-990
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Rev:1_17
Yaesu FT-857/897 Series radios
with KPA/KAT500 Power Combo
The Yaesu 857/897 series radios can be connected to the KAT/KPA500 combo using the Key signal
available on the rear panel of the rig. On these Yaesu radios, the keying signal is called, TX GND, and is
available on the Linear jack as shown below.
This will set the KPA/KAT500 combo up for what is called, Basic Mode operation.
Model
Connector pin out
Menu settings
to check
Ft-857/FT-897
FT-990/FT-991
Item 020: Set to
Linear
On FT990/991,
be sure to
disable internal
tuner.
Connections to the KPA500 and KAT500
Then, you will make the following connections with the KPA500 and the KAT500. Please note that
cable items #2 and #4 are included in the boxes with the KPA500 and KAT500. We have RF patch
cables available (cable #1) if needed. An adapter cable from these rigs to the KAT500 (cable #3) will
be available soon from Elecraft.

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Yaesu FT-990 Specifications

General IconGeneral
TypeHF Transceiver
Frequency Range RX0.1-30 MHz
Receiver TypeTriple conversion superheterodyne
Antenna Impedance50 ohms
Power Supply13.8 VDC
ModesSSB, CW, AM, FM
Output Power100 W (SSB, CW), 40 W (AM), 25 W (FM)
Selectivity2.4 kHz (SSB), 500 Hz (CW), 6 kHz (AM), 12 kHz (FM)

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