Users Manual
200W HF/50MHz Band
Auto Antenna Tuner
Model HC-200AT
1
Caution
1. Never remove or open the tuner cover while transmitting.
When there is RF in the circuits of the tuner, there will be high voltage RF
on the components and you can get an RF burn. Please use caution !!
2. You must reduce power to no more than 20 watts while tuning.
3. Never touch the antenna output especially when using a wire antenna.
There is a high voltage at that point.
4. Do not transmit unless you are connected to an antenna or dummy load.
5. Never exceed the maximum designed power of 200 watts into the tuner.
2
Features
1. HC-200AT is a compact 200W HF/6m auto antenna tuner . It works with
any radio having a frequency coverage of 1.8~54MHz, and power output of
2-200W.
2. With a wire antenna of 7.5m ( 25 feet ) or longer, the tuner will tune from
3.5 through 54MHz. For 1.8MHz ( 160M ), a minimum length wire of 30m
( 95 feet ) is recommended.
3. The advanced 16 bit MPU ( micro processor ) calculates the ratio of
forward and reflected power. Our newly developed computing algorithm
will produce a world class tuning speed.
4. 256 capacitors ( C ) and inductors ( L ) are combined to form the inverted
L-shape circuit. Depending on antenna, capacitances m ay be switched from
one end of inductors to the other to form the reversed inverted -L shape
circuit. There are 131,072 combinations of L & C.
5. Tuned data of L and C are stored in the ten channel memory. Tuning under
memory mode using the same antenna on the same frequency is finished
within 0.2 second after the initial tuning.
6. High current capacity relays are used in the L and C tuning network.
7. Tuning will be accomplished by tapping the “TUNE” button, and or
pressing the “TUNER” ( or “TUNE” ) button of the radio, if the tuner is
connected to the Radio Interface” cable. ( See Connection Section. )
8. Analog meter monitors the forward power ( P
F ) and SWR. SWR is
indicated automatically with the modern processor IC.
3
Front Panel Description
⑥ TUNING Red LED lights while the tuner is working to match the antenna
and goes off when tuning is finished. LED will flash for a few seconds., if
SWR is over 2.5 after tuning is completed.
⑤ SWR The green LED lights if SWR is less than 1.5 after the tuning.
And it flashes for a few seconds when SWR after the tuning is 1.5~2.5 .
② TUNE ( Button ) If this switch is tapped ( for less than 0.3 second ), t
tuner will enter into by-pass ( through ) mode. And if pressed for 0.3
second or longer, tuning will automatically start. By pressing “TUNER
( TUNE )” button on the radio, tuning may be initiated when radio interface
cable is connected from the tuner to the TUNER socket on the radio.
③ METER ( PF / SWR Select Switch ) Switches between forward power
( PF ) and SWR of ⑦ PF / SWR meter.
⑦ PF / SWR METER Power meter to read the forward power and
SWR.
④ ANT SEL ( Antenna 1, Antenna 2/ Wire Select ) This switch selects
three types of your antennas, or two coax cable antennas and one wire
antenna.
① POWER ( Switch ) If this switch is pressed, DC power will be turned on.
Also the power meter will be lighted and it is useful in dark areas. Pressing
the switch to unlock, DC power will be turned off. At this time the tuner
network will be connected to Antenna 1.
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