INSTRUCTION MANUAL
HF BAND 1.5kW
AUTO ANTENNA TUNER
MODEL : HC-1.5KAT
Contents
1. Foreword
2. Features
3. Cautions
4. Specifications
5. Explanations of Front & Rear Panels
6. Connections (Setting)
7. Operation
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1) Initial Status When Power Turned On
2) Operation Mode and Setting Mode
3) Manual Tuning Mode
4) Flow of Operation
5) Conditions for Self Tuning Initiation
6) Menu Map
8. Explanation of Various Functions
9. Technical Information
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1. Foreword
HC-1.5KAT is an HF high power auto antenna tuner with a maximum power handling
capability of 1.5kW.
It works in an auto band set mode when combined with Tokyo Hy-Power Linear amps of
HL-1.5KFX and HL-2.5KFX. Also, it features an extremely fast tuning speed of 1 sec. max.
in most cases. When the transmitter is keyed, the tuner detects the antenna impedance
(resistance and reactance) directly, and two variable capacitors are auto-adjusted so that
tuner matches the antenna impedance.
2. Features
High speed and precision tuning due to the high resolution stepping motors: Usually
•
less than one second of tuning time and auto tracking (re-tune) during on air.
•
Auto band-set operation with Tokyo Hy-Power HL-1.5KFX and HL-2.5KFX amps: Our
original inter-face design for a combined auto operation.
Linear amps other than those two models can be combined, if band set only is manually
made.
•
Simple operation: Auto tunes even with ssb/voice as well as keyed codes.
During the auto-tuning time period linear amp is held at STBY (stand-by), and is
automatically turned on to OPER. (operate) as soon as the tuning is completed.
•
High power quality components used throughout such as 3 kV air variable capacitors
and power relays.
•
There are three antenna ports of SO-239 provided that can be programmed to the
specific operating bands as desired.
Also these ports may be programmed “Thru (through)”, as needed to by-pass the tuner
network.
•
Pre-set positioning system is incorporated to set the initial variable capacitors positions
at mid points of respective frequency bands.
This makes the tuning time relatively fast and more advantageous.
•
“Forced tune” function is incorporated.
As you move the frequency on the radio, auto-tuning may or may not be initiated.
If the exact tuning is desired in such a case, forced tuning is available by pressing the
SELECT dial knob.
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3. Cautions
Note the followings for the safety of the operator.
A If any smoke, odor, or fire is detected, take the following steps for safety.
① Cease the transmission.
Turn off the power of linear amp and radio. ②
③B Turn off the power of tuner.
High RF Voltage
A high RF voltage is generated during the transmission period.
Never remove the top cover. •
•
Never operate without connecting an antenna.
•
Never touch RF connectors.
•
Be careful of the tuner cabinet as it may bear RF voltage depending on the
antenna type connected.
•
Those operators with heart pacemaker must not approach the tuner.
•
Avoid the risk of RF burn from a high SWR antenna. Long wire antenna
generates an extremely high RF voltage depending on its element length.
•
Never touch cooling fan inside as well as L, C components as they generate
much heat during operation.
C
Limited Application
This tuner is designed for the use of the amateur radio station operated by qualified
operator. Application for other than designed purpose leads to the failure of the
device and/or the severe damage to the surrounding devices.
Never exceed the maximum handling power of 1.5kW.
D Setting
Internal parts such as tuning coils and motors are forced air cooled and need air
ventilations. Keep at least a few inches of space from the rear wall, and a space of
rubber feet height at the bottom.
Keep out of direct sun light, in a clean dry environment.
E Power Derating for High SWR Antenna
When the antenna has high SWR of 3 to 4, reduce RF output power by at least a
half not to damage the tuning components.
Also never attempt to tune to very high SWR antenna, even if the tuner happens to
work, or the tuning relays and capacitors will be severely damaged.
F Order of Turning Powers On
It is recommended to turn on in the order of transceiver at first, then linear, and the
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auto tuner.
G 50MHz (6m)
The tuner does not cover 6m band.
When combined with HL-1.5K
panel for the band selection of 50MHz with HL-1.5KFX.
H 1.8 and 3.5 MHz Bands
These bands are divided into three segments as follows;
160m
80m
Depending on your operation, you can program your favorite segments into
memory.
(This helps reduce the loads of tuning elements of the network.)
I. Power Off/Thru
When the POWER switch is turned off, “IN” (coax input from the linear) is
by-passed to ANT1 port.
1.8, 1.9, 2.0
3.5, 3.8, 4.0
FX amp, “50MHz BAND THRU” is displayed on LCD
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4. Specifications
Model HC-1.5KAT Specifications
Parameter Description Remarks
Frequency Range 1.8-29.7 MHz
Output Impedance Range
Maximum Handling Power 1.5 kW (P.E.P./CW) RTTY 1kW
Input Impedance
Tuning Power 50 W (80W max.)
Tuning Time 1 sec. (typ.)
2.5 sec. (max.) Under typical worst SWR
4.0 sec. (max.) Under absolute worst SWR
DC Power Voltage DC 12 V - 14 V From external DC power
Current Drain 1.5 A max.
Quiescent Current 0.7 A
DC Power Polarity Negative ground
Display LCD Module
12.5-200 Ω
(*16.6-150 Ω)
50 Ω
*Reduced range on 1.8, 3.5
and 28 MHz.
condition
condition
supply (Power supply not
included.).
Operating Temp. Range 0 deg. to +40 deg. C
VSWR (Max.) 1.5 (typ.) or lower After tuning
Circuit Type T-shaped
Driving Motors Stepping Motors for Two Air
Variable Capacitors
L Changes Relays to short
Matching Algorithm Analog Control with MPU Phase and |Z| Magnitude
Dimension 200 x 140 x 300 mm
(W x H x D)
Weight Approx. 5 kg, or 11 lbs.
Input Connector SO-239 (UHF)
Output Connectors Three SO-239’s
Cooling Partial air forced cooling fan
Accessories DC power cable with 3.5 mm dia.
plug (4 feet)
Band control cable with DIN 7 pin
0.25 deg. resolution/step
Detected
Approx. 8 x 5.6 x 12 inches
To connect to THP amps.
plugs
PTT Out cable with RCA plugs To connect to amps.
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