Yaesu FT-857 series User Manual

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.

Yaesu FT-857 series Specifications

General

Supply Voltage	13.8 VDC ± 15%
Frequency Range RX	0.1-56 MHz, 76-108 MHz, 118-164 MHz, 420-470 MHz
Modes	SSB, CW, AM, FM
Channels/Memory	200
Power Output	100 W (HF/50 MHz), 50 W (144 MHz), 20 W (430 MHz)
Image Rejection	>70 dB

Summary

Yaesu FT-857/897 Series Radios with KPA/KAT500 Power Combo

Connection and Setup for Yaesu Radios

Details connector pinouts and menu settings for connecting Yaesu radios to the KPA/KAT500 combo.

Physical Connections to KPA500 and KAT500

Explains physical connections between Yaesu radios and the KPA500/KAT500 power combo.

KAT500 Configuration Utility Setup

Optimizing KAT500 for KPA500 Configuration

Guide to using the KAT500 Utility to optimize settings specifically for the KPA500.

Training the KAT500 Tuner

Tuner Training Overview and Initial Setup

Explains the process of training the KAT500 tuner and initial setup steps required.

Performing Full Tune Cycles

Detailed instructions for performing a full tune cycle for the KAT500 on each band segment.

Training Across Multiple Bands and Antennas

Guides on training the tuner across different frequency bands and multiple antennas.

Saving Tuner Configuration Data

Instructions on saving the trained tuner settings using the KAT500 Utility.

KAT500 Operating Modes: MAN vs. AUTO

Understanding MAN and AUTO Modes

Compares MAN and AUTO modes for the KAT500 tuner operation and threshold settings.