Yaesu FTdx3000

Yaesu FTdx3000
Yaesu FTdx3000 with KPA/KAT500 Power Combo
The Yaesu FTdx3000 series radio can be connected to the KAT/KPA500 combo using the Key signal
available on the rear panel of the linear and tuner. On these Yaesu radios, the keying signal is called, EX
GND. This will set the KPA/KAT500 combo up for what is called, Basic Mode operation. Here's that
connection on the FTdx3000 rear panel:
Model
Connector pin out
FTdx3000
Menu settings
to check
 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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Note: Cable #5 is a special connection for the KAT500 to operate as an Icom remote tuner. It is not relevant
for a Yaesu radio.
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Set-Up Procedure for the KPX/KAT500 Combo
Set up the KAT500 to interoperate with the KPA500. Please enter the KAT500 Utility and select the
Configuration tab then click on the button to Optimize for KPA500.
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Training the Tuner
Overview
We will be stepping through each band where you have an antenna connected to the KAT500, selecting the
top, bottom and places in the middle of each band where you expect to operate. At each of these points, we
will be causing the radio to emit a steady-state RF signal for the KAT500 to use while it executes a full tune
cycle. Since the KAT500 is an Automatic Tuner, it will remember the settings it finds at each of the points in
the band. This is referred to as 'Training the Tuner'.
The following sequence assumes that the radio, KAT500 and, if appropriate, the KPA500 are installed as
specified in the KAT500 Owner's Manual, shown above as Figure 1. Place the KPA500 into STBY mode while we
train the tuner.
Set up



On the radio, please select RTTY mode and an RF output level of about 25 watts.
On the KAT500, select the MAN mode.
On the KAT500, Tap the ANT button to select the appropriate antenna. The ANT LED will light
solidly indicating the antenna port selected.
 On the radio, select the appropriate band. Then, adjust VFO A to the lowest spot in that band
where your antenna will work.
 We suggest you start with 160 meters and step through the bands up to 6 meters.
For each VFO Setting perform the following to Train the KAT500:
1. Tap the MODE button so that MAN light is selected and is not flashing.
2. Next, Tap the TUNE button on the KAT500. The MAN light will now start to Flash. This
indicates that the KAT500 is now awaiting the RF needed to execute a Full Tune Cycle.
3. On the radio, key the rig with the PTT button on your mic to cause the radio to go into
transmit. The radio’s TX light should come on to confirm it is transmitting.
4. While holding the PTT button in, the KAT500 will begin to clatter as it searches for a low
SWR. This is called the Full Tune Cycle.
5. The clattering will stop once a low SWR is found and the KAT500 MAN light will now be
solid. This indicates that the full tune cycle is complete and the results have been memorized.
a. Note that the tuner may not find a 1:1 SWR, which is normal. As long as the MAN light
goes out, it has found a low SWR and has memorized the tune elements needed.
6. On the radio, adjust VFO A frequency for the upper end of the band where your antenna will
operate. Repeat Steps 1-3 above for this setting.
7. Then, move into the middle of the band and repeat Steps 1-3 again.
8. These settings should give now have stored the tuning elements needed for those band ends
and middle.
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9. You may go through and add more tuning memories by selecting other portions of the bands
where you tend to operate frequently.
Train the tuner on all Bands


Next, step to other bands where your antenna can operate within a 10:1 SWR ratio. Perform
the same steps above as with the first band chosen.
How do you know how many times per band needed to fully train the tuner? Here's the
answer from the KAT500 Owner's Manual.
Training the tuner with all of your antennas
If you have more than one antenna, continue to ANT 2 and ANT 3 ports using the same technique
above for those antennas. The KAT500 tuner can remember settings for all 3 antenna ports
separately!
Make it Easy for Your Tuner to Remember what it was Trained to Do
Once you have fully trained your KAT500 tuner on all bands and all Antennas, you can save your work
using the KAT500 Utility. Go to the Configuration tab in the Utility and select Save Configuration to
complete your tuner's training.
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MAN mode or AUTO mode?
Unless you intend to operate the KAT500 in a remote configuration where it may be a long distance
from where you will Control it, Elecraft recommends using MAN (Manual) mode.
AUTO mode has an additional feature where the tuner will monitor SWR while you are transmitting.
If, for some reason, the SWR rises above about 1.8:1 threshold (the default), AUTO mode will cause
the KAT500 to enter Full Cycle Tune mode without you starting it. When used remotely, this is a very
effective way of accommodating wide-ranging SWR due to weather or other conditions. Successful
Full Cycle Tunes in AUTO mode will be memorized just as they are in MAN mode.
AUTO mode thresholds can be set by the operator, too. Use the KAT500 Utility to enter the
Configuration dialog and select Thresholds. There you can specify, by each ANT port, what level of
upper and lower thresholds you want the AUTO mode feature to monitor.
MAN mode will store successful Full Cycle Tunes just as AUTO mode will and the KAT500 will monitor
SWR while you are transmitting. However, the KAT500 will not act if the SWR rises of falls. You can
monitor it for yourself directly from the front of the KAT500 or from the KAT500 Utility.
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