DX Engineering RF-KIT Instruction Manual

Operating and installation instructions RF-KIT Power Amplifier RF2K-S
Operating and Installing-Instructions
.-. ..-. -....- -.- .. - .--. --- .-- . .-. .- -- .--. .-.. .. ..-. .. . .-.

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
Table of contents
1. Explanation of symbols, Environment protection 3
1.1 Explanation of symbols 3
1.2 Environment protection 3
1.3 Transport package 3
2. Safety informations 4
3. Control elements and connections 5
3.1 Panel description 5
3.2 Control elements and connections 6
4. Preparing for operation 7
4.1 Unpacking 7
4.2 Scope of delivery 7
4.3 Selecting a location 7
4.4 Grounding 7
4.5 Connecting exciter 7
4.6 Connecting PTT-cable 7
4.7 Preparing LAN connection 7
4.8 Connecting antenna(s) 7
4.9 AC Line cord connection 7
Dear customer,
Congratulations on your purchase of a RF-KIT linear amplier!
RF-KIT devices oer innovative and reliable technology, functionality and
appealing design.
If, in spite of our careful quality control, you have any reason to complain
or have a question about the device, please contact the dealer you trust or
even directly to RF-KIT.
vy 73 es gd dx de
RF-KIT Reinhard Förtsch
Heuleithe 14 · 91322 Gräfenberg
Germany
Tel.: [phone]
www.rf-kit.de · [e-mail]
DX Engineering
1200 Southeast Ave.
Tallmadge, OH 44278 USA
www.dxengineering.com
© 2020 by RF-KIT Reinhard Förtsch
Errors and omissions excepted. The removal of the copyright notice and
the use of content, even in part, violates applicable law and is expressly
prohibited.
5. Using the device locally 8
5.1 Turning device on 9
5.2 User menu 9
5.2.1 Settings 9
5.2.2 Antennas 11
5.2.3 Updates 12
5.2.4 Calibration 13
5.2.5 VNC 16
5.2.6 Interface 16
6. Antenna tuner 17
6.1 Operation 17
6.2 Input Power for tuning 18
6.3 Manual tuning 18
6.4 Automatic tuning 19
6.5 Indication area Segment-Size 20
6.6 Bypass the antenna tuner 21
7. Technical data and characteristics 22
7.1 Technical data 22
7.2 Characteristics 22

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
1. Explanation of symbols, Environment protection
1.1 Explanation of symbols
Warnings
Warnings are marked by a warning triangle.
In addition, signal words indicate the nature
and severity of the consequences if the mea-
sures to avert the hazard are not followed.
The following signal words are used in this document:
NOTE means that property damage may occur.
WARNING means that serious or even life-threatening personal injury
may occur.
DANGER means that serious or life-threatening personal injury will
occur.
Important information without danger to people or proper-
ty is marked by the adjacent symbol. These informations are
boanded by lines above and below the text.
1.2 Important informations
Symbol Meaning
►Instruction
➔Reference to a position in the document
Enumeration/List entry
- Enumeration/List entry
(2nd level)
1.3 Environment protection
Disposal of packaging
The packaging protects the device against damage during transport. The
packaging materials are selected according to environmentally friendly
and disposal-related aspects and thus recyclable.
The return of the remaining packaging parts, such as packaging straps, PE
bags, etc., into the material cycle saves raw materials and reduces waste.
If you plan to dispose of the packing by yourself, please locate the nearest
recycling center.
2. Safety informations
Read these operating and installation instructions carefully and com-
pletely before attempting to install and operate the device!
Keep these operating and installation instructions carefully. These
operating instructions contain important safety and operating
instructions for the use of the RF2K-S linear amplifier.
When selling the device hand this document to the new owner.
There are dangerous voltages inside the device! Before opening the
device:
►Switch off the device by pressing the power switch On/Off (1) at the
front of the device and wait until all cooling fans stop.
►Disconnect the power cable from the Power jack (9).
Follow the instructions of a note to avoid damage to the device!
Follow the instructions of a warning to avoid serious injury!
Please use this linear amplier only according to the instructions in
this manual.
The device is designed only for operation on frequencies of the ama-
teur radio service. For legal operation you need a valid amateur radio
license.

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
This device is NOT a TOY. It must not be handled by children or placed
within reach of children or even been operated.
The unit should only be opened or serviced by a qualied technician.
This device generates high frequency energy. Use the device with due
care regarding the system conguration.
When connected to an antenna, this linear amplier can generate
high-frequency electromagnetic elds, which must be evaluated ac-
cording to applicable national laws. All measures must be taken to
ensure the necessary insulation regarding human exposure (observe
minimum distances!).
The radio frequency energy generated by this device may interact
with some electronic devices such as pacemakers and debrillators.
Refer to the manufacturer instructions of a pacemaker or debrillator
for precautions in the vicinity of a radio frequency transmitter.
Immediately stop an ongoing transmission if malfunction or interfe-
rence with a pacemaker or debrillator is suspected!
DANGER - HIGH TENSION!
NEVER connect an antenna or remove an antenna
socket while the unit is transmitting!
This can cause electric shock or burns!
DANGER - HIGH TENSION!
NEVER operate the device without properly
mounted cover.
This can cause electric shock or burns!
DANGER - HIGH TENSION!
NEVER apply mains voltage before the linear
amplifier is Grounded.
Touching the linear amplifier in this case can
cause an electric shock!
WARNING!
NEVER operate the device with a mains voltage
other than the recommended 110-240 V mains
voltage.
This could cause a fire or destroy the device!
WARNING!
NEVER operate the device together with an
extension cord or multiple socket.
This could cause a fire or electric shock!
WARNING!
NEVER allow pieces of metal, wires or other
objects to touch the internal parts or connectors
on the back of the device!
This can cause electric shock or burns!
WARNING!
NEVER leave children alone with the device ready
for use!
Risk of injury due to electric shock!
WARNING!
The device is intended only for indoor use. NEVER
expose the device to liquids and NEVER operate it
in a humid environment!
This can cause electric shock, burns and destroy
the device!
WARNING!
The device gets hot during prolonged transmis-
sion operation!
NOTE:
Avoid using or installing the device in environ-
ments with temperatures below -10 ° C (+ 14 ° F)
or above + 40 ° C (+ 104 ° F).
Avoid the exposition to direct sunlight onto the
device and operation in extremely dusty env-
ironment.
NOTE:
Place the device only at a well-ventilated place!
Make sure that no objects are placed on the
device or near the ventilation openings, which
will hinder the heat dissipation.

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
3. Control elements and connections
3.1 Panel description
1 On/O
2 Touch screen
3 ANT 3
4 ANT 4
5 ANT 2
6 ANT 1
7 PTT
8 Power On Extern
9 Power jack
10 Fuse
11 Ground connector
12 Multifunction connector
13 LAN
14 Cooling fan
15 CAT USB
16 -55 dB output
17 Exciter input
0
I
Front panel:
Rear panel:
1
2
5
6
3
4
14
12
16
15
13
7
8
9
11
10
17

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
3.2 Control elements and connections
1 Power switch O n / O  ( 1 ) (main switch)
This rocker switch switches the device on / o.
2 Touch screen - GUI
This Touch screen controls the device in all operating states.
Also you receive context-related information about the operating
status of the device.
3 ANT 3
50 Ω antenna socket SO-239 (PL-259)
4 ANT 4
50 Ω antenna socket SO-239 (PL-259)
5 ANT 2
50 Ω antenna socket SO-239 (PL-259)
6 ANT 1
50 Ω antenna socket SO-239 (PL-259)
When device is switched o, ANT 1 (6) is looped through.
7 PTT
RCA connector for transmit/receive switching
At the center contact (+) of the connector PTT (7) +5 V are
present.
8 Power On Extern
RCA connector for remote control: The device can be switched on re-
motely by applying + 12V DC (at least 10 V, max 15 V!) to the center
contact. The power switch O n / O  ( 1 ) must be switched o (“0“).
When DC voltage drops, the PA switches o.
9 Power jack
A plug for this power socket is included and can be wired to the user
supplied power cord capable of 16 Amps, that meets their countries
power plug requirement.
10 Fuse - automatic circuit breaker 16 A
If this automatic circuit breaker triggers several times in succession,
this usually has a valid reason!
WARNING!
Do not open the device by yourself, contact the manu-
facturer!
11 Ground connector
12 Multifunction connector DB-15
1
9
8
15 (Plugview)
DB-15 Connector Pin Assignments:
1 - In A Spare
2 - In B Spare
3 - In C Spare
4 - In D Spare
5 - Out A BCD band data output
(Transistor output, max. 15 V / 50 mA from external)
6 - Out B BCD band data output
(Transistor output, max. 15 V / 50 mA from external)
7 - Out C BCD band data output
(Transistor output, max. 15 V / 50 mA from external)
8 - Out D BCD band data output
(Transistor output, max. 15 V / 50 mA from external)
9 - TKEY Output / input for tuner control (available soon)
10 - TSTR Input for tuner control (available soon)
11 - RS232 TX -
12 - RS232 RX -
13 - GND -
14 - GND -
15 - OUT 15 V Max. 500 mA if device is switched on; can be used for
external controls (e.g., remote control relay control).
14 Cooling fan
The high-performance fan is temperature-controlled and ensures
reliable cooling of the power electronics with minimal noise, even
during maximum continuous load (contest operation!).
15 CAT USB - USB 2.0 connector “CAT“
Band data import / export between exciter and PA.
16 -55 dB output
SMA connector for adaptive predistortion of the exciter signal along
with SDR transceivers.
17 TRX - 50 Ω SO 239 connector
Input exciter (transceiver) signal.

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
4. Preparing for operation
4.1 Unpacking
►After unpacking, inspect the device for shipping damages.
►Report any damage immediately to the delivering freight forwarder
or dealer. Keep the shipping box.
4.2 Scope of delivery
1x RF2K-S Power Amplier
1x 120 V AC line cord
1x 240 V AC line cord
1x Short coaxial cable with 1x SMA connector (“Pigtail“)
1x Micro SD-Card for operating system
4.3 Selecting a location
Because of its weight the device must be situated on a stable surface.
►Select a location for the device that ensures adequate air circulation
(at least 10 cm of free space in front of and behind the PA are
neccessary).
►Avoid locations with extreme heat or cold, high humidity and
vibrations.
Avoid operation near TV sets, television antennas, radios and other elec-
tromagnetic sources.
4.4 Grounding
WARNING!
NEVER connect the Ground connector (11) to a
gas or power line, as this may cause an explosion
or a electric shock!
To prevent electric shock, television interference (TVI), radio interference
(BCI) and similar problems:
►Ground the device via the Ground connector (11) at its back.
For best results, use a copper wire with large cross-section to connect
to a copper rod, as long as possible, buried in conductive soil.
►Keep the length of this copper wire as short as possible!
4.5 Connecting exciter
►Connect the antenna socket of the exciter (a transceiver in general)
to the connector TRX (17) of the PA via a coaxial cable.
4.6 Connecting PTT-cable
►Connect the PTT connector of the exciter (a transceiver in general)
to the connector PTT (7) of the PA via a RCA cable.
At the center contact (+) of the connector PTT (7) +5 V are
present.
4.7 Preparing LAN connection
►Connect a ethernet cable to the LAN (13) socket.
►Connect the ethernet cable to the router / switch of your local area net-
work.
4.8 Connecting antenna(s)
Do NOT transmit without an antenna or dummy load connected! Select
one or more 50 Ωantennas or dummy load with 50 Ωlead and more than
2 kW rated power.
►Connect 1-4 antenna(s) to the desired 50 Ω antenna socket using
suitable coaxial cable with as little loss of power as possible, and pro-
fessionally mounted SO-239 plugs to connector ANT 1 (6), ANT 2 (5),
ANT 3 (3), ANT 4 (4).
ANT 1 (6) is looped through as long as device is “o“.
4.9 AC Line cord connection
The device works with mains voltages between 90 and 290 V AC. We re-
commend the use of 200-240 V / 50-60 Hz AC to ensure the full performan-
ce of the device.
If the device is operated at 110 V, the maximum output power drops from
approximately 2000 W to approximately 900 W.
►Connect the device with the included line cord via Power jack (9) to a
properly installed power outlet.

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
Indication area Personalization Text
An individualization text to be edited in the user menu (e.g. call sign) is displayed here
5. Using the device locally
5.1 Turning device on
►Turn on the device using power switch On/O (1).
The Touch screen (2) lights up and shows the user interface:
Indication area Forward Power (analog PEP and digital Minimal / Maximal)
Indication area Reected Power (analog PEP and digital Minimal / Maximal)
Indication area SWR (analog PEP and digital Minimal / Maximal)
Indication area Error Messages
Indication area Choosen band
Switching area/Indication area Actually Choosen Antenna
Switching area
Interface
Switching area/
Indication area
Antenna Tuner
Indication area Operating Parameters
(selected interface, end transistor supply voltage, output stage temperature, output stage current consumption)
Indication area Personalization Text
An individualization text to be edited in the user menu (e.g. call sign) is displayed here Switching area Menu
Touching this switching area activates the user menu
Indication area
Frequency TRX
Switching area Tune
Touching this switching area triggers a tuning process
Switching area
Reset PA
If the PA switches o due to an error, it is reactivated after actuating this switching
area; the error message (e.g. “zu hohes SWR“ vanishes)
Switching area
Standby
Switching between
“Standby“ (red)
“Operate“ (green)

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
5.2 User menu
►Touch the switching area Menu.
The Touch screen (2) changes to the user menu and displays the screen
shown to the right. The following submenus can be selected:
5.2.1 Settings
Personalization Text
►Click the text box, highlight and change the personalization text by
using mouse and PC keyboard.
Display
►During remote operation, it makes sense to turn o the Touch screen
(2) (Touch screen (2) activated “On“ / deactivated “O“)
Type
►Choose a GUI which you like
(Standard / Cross Pointer):
Standard Cross Pointer
Switching areas Submenus
(Settings / Antennas / Update / Calibration / VNC / Interface)
Switching area Close
Touching this switching area closes the user menu;
subsequently the main screen will be displayed
Switching area
Tuner
Activates (“On“) /
deactivates (“O“)
the antenna tuner
Switching area Type
(Standard / Cross Pointer)
Input box
Personalization Text
Editing via a PC connected
to the PA
Switching area
Display
(On / O)
Switching areas
Memory Bank (1 / 2 / 3)
Touching one of these switching areas
selects one of three memory banks
together with the antenna sockets
assigned to them (max. 4).
Switching areas
Clear Antenna
(1 / 2 / 3 / 4)
Antenne für selek-
tierte Memory Bank
löschen.
Switching area
Sleep Timer
(On / O)
Switching areas
Sleep Timer Duration
(Time until Standby in minutes)
Switching areas
Erase Memory Bank
Touching one of these
switching areas deletes
the contents of only the
selected memory bank.

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
Sleep Timer
►The Sleep Timer is activated/deactivated by (multiple) touching this
switching area (Sleep Timer activated “On“ / deactivated “O“)
Sleep Timer Duration
►By touching the switching areas “<“ or “>“ the Sleep Timer can be
adjusted.
If there is no operation during the set duration, the unit switches to stand-
by mode (Stand By) after the set duration has expired. Each activity via
the Touch screen (2) resets the Sleep Timer to the set duration and the
countdown to Stand By starts again.
Memory Bank
Only one Memory Bank can be activated at a time.
►Select the currently active Memory Bank by clicking on one of the
three circular fields. The currently active Memory Bank is indicated by a
filled circle field.
A Memory Bank contains the number and all determined setting data
of the Antennas assigned to it. Clearing a Memory Bank only clears the
antenna tuner setting data determined in connection with this specific
Memory Bank for all Antenna Sockets assigned to the Memory Bank.
The contents of the other two Memory Banks remain untouched.
Erase Memory Bank
►By clicking on one of the three circular fields, the contents of the cor-
responding Memory Bank are deleted.
NOTE!
Contents are deleted in any case and regardless
of whether the corresponding memory bank is
currently activated.
Tuner
►The Antenna Tuner is activated/deactivated by (multiple) touching
this switching area
(Antenna Tuner activated “On“ / deactivated “O“)
Clear Antenna
Clears the Antenna Tuner Setting Values of an Antenna Socket within a
currently active Memory Bank.
►Deleting the Antenna Tuner Setting Values of an Antenna
Connector by touching the switching area Garbage Can.
Further submenus are:
- Antennas
- Update
- Calibration
- VNC
- Interface

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
Switching area Close
Touching this switching area closes the user menu;
subsequently the main screen will be displayed
5.2.2 Antennas
For each band an Antenna Socket can be assigned to, which is selected by
default when changing bands.
To assign an Antenna Socket to a band:
►Tap the circle field in the corresponding column/row.
The circle field is now displayed in black and thus indicates the current an-
tenna assignment for the respective band.
►Tap the switching area Save to store the selected assignments as the
default when changing bands.
Indication Band
Name ANT 4
Name ANT 3
Name ANT 2
Name ANT 1
Switching area Save
Activating this switching area
stores the selected assignments

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
5.2.3 Updates
The graphical user interface (GUI) and the controller rmware are constant-
ly being further developed. We therefore recommend that you check for
available Updates from time to time.
If the device is connected to the Internet, you can search here for updates
for the graphical user interface (GUI) and the controller firmware of the
PA. If newer versions are available, they can be installed quickly and easily.
►Tap the switching area Check for Updates to check for the availabili-
ty of updates.
Switching area Close
Touching this switching area closes
the user menu; subsequently the main screen
will be displayed
Switching area
Check for Updates
Touching this switching area checks
whether updates are available
►Tap the switching area Update to start the update process.
Switching area Close
Touching this switching area closes
the user menu without performing
an update; subsequently the main screen
will be displayed
Switching area
Update
Touching this switching area starts
the update process
Software version
GUI
Software version
Controller

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
Switching area Close
Touching this switching area closes the user menu;
subsequently the main screen will be displayed
5.2.4 Calibration
This menu item is divided into 3 submenus:
- Poti Cong:
Indication area operating data
- Oset Calibration:
Calibration of the internal power measurement
- Output Power Calibration:
Band specic power matching
Poti Cong
Before the device can be used after installation, some necessary adjust-
ment work must be carried out!
The indication areas inform you about some of the relevant values in this
context.
- Voltage
Current voltage at the Power MOS-FETs
- Current
Current consumption of Power MOS-FETs
- PF
HF-Output
- PAF
HF-Output at the PA module
- PR
Reected (returning) HF-power
Indication area Voltage
Indication area PF
Indication area Current
Indication area PR
Indication area
PAF

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
Oset Calibration
The unavoidable frequency-dependent deviations of the linearity of the di-
rectional coupler used for internal power measurement can be minimized
for each bandpass range.
The adjustment should be carried out at an output power of 1 kW.
Use your preferred reference wattmeter for the adjustment.
Selection of the bandpass range is done automatically during transmission.
The detected band is highlighted.
►Adjust the internal power display by pressing the buttons > (increase
value) respectively < (decrease value).
Brief actuation changes the value in the indication area Forward by 0.1 W.
Longer actuation changes the value continuously.
►Press the switching area Save to store the settings.
►Repeat this procedure for each bandpass range to be adjusted.
Indication area Band
Switching area <
(decrease value)
Switching area >
(increase value)
Indication area
Reected
Indication area Forward
Switching area >
(increase value)
Switching area <
(decrease value)
Switching area Close
Touching this switching area closes the user menu;
subsequently the main screen will be displayed
Switching area Save
Touching this switching area
stores the settings

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
Output Power Calibration
The output power generated at a given control power can be adjusted op-
tionally within certain limits for each bandpass range.
The 6 m band requires a higher control power than the
other frequency ranges and should therefore always be set
to “100“.
Selection of the bandpass range is done automatically during transmission.
The detected band is highlighted.
►Adjust the Forward Power by pressing the buttons
> (increase value) or < (decrease value).
Short actuation changes Calibration Value by 1 digit.
Longer actuation changes the Calibration Value continuously (factory
setting: 100.0).
Indication area Forward Power constantly informs you about the current-
ly generated output power.
►Press the switching area Save to store the settings.
►Repeat this procedure for each bandpass range to be adjusted.
Indication area Band
Switching area >
(increase value)
Indication area
Calibration Value
Switching area <
(decrease value)
Switching area Close
Touching this switching area closes the user menu;
subsequently the main screen will be displayed
Switching area Save
Touching this switching area
stores the settings
Indication area Forward Power

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
5.2.5 VNC
With a VNC (Virtual Network Computing) connection, the device can be
remotely controlled and operated from any PC, tablet PC or even smart-
phone connected to the Internet or local network using VNC software
(remote operation).
►Tap in the switching area VNC to check the IP Address currently
assigned to the PA.
Switching area Close
Touching this switching area closes the user menu;
subsequently the main screen will be displayed
Indication area IP Adress
A VNC configuration will be available in one of the next firmware versions
as part of an update.
5.2.6 Interface
IIn future software versions the data connection between control transmit-
ter/transceiver and PA will be congured in this screen mask.
This part of the firmware is currently still under development.
Switching area Close
Touching this switching area closes the user menu;
subsequently the main screen will be displayed

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
6. Antenna tuner
6.1. Operation
The LC network in a antenna tuner is to compensate reactive components
and to provide power adjustment, so the antenna radiates supplied TX
power Peff via the radiation resistance R.
This requires:
- compensation of reactance jX = j(ωL-1/ωC) of the antenna system
and
- transformation of the effective resistance for power adaptation of the
transmitter to the antenna system.
(Antenna system = antenna + impedance transforming feed line).
Available values of C: Minimal 0.0 pF; Max. 1275 pF
Available values of L: Minimal 0.0 μH; Max. 10,16 μH
The integrated antenna tuner can perform this “at the push of a button“
for you automatically (tuner mode “MAN“). In this case, after touching the
swichting area Tune, the Tuner automatically determines the required
configuration and all settings.
Beside of that, you have the option of performing the tuning process
manually (tuner mode “MAN“) or refine a configuration that has already
been determined before.
Regardless how a setting has been determined, all of the values can be
stored for later retrieval (tuner mode “AUTO“), so a re-tuning process is
superfluous.
A separate database will be created for each antenna socket, in which all
already determined settings for this antenna will be stored.
Depending on the currently selected antenna socket, only settings stored
for this antenna socket will be considered during operation. The antenna
tuner continually checks for the availability of a suitable, already stored
setting for the currently selected antenna socket while tuning a frequency. NOTE:
If the antenna tuner is activated, but no valid
tuning data is stored yet for the used frequency,
transmitting is not possible!
Indication area L (in μH)
Switching area Tune
Pressing this switching area triggers a tuning process of the antenna
Indication area Segment-Size
Switching area K
Selection conguration antenna tuner
Switching area/Indication area
Tuner-Mode
Selection
“AUTO“ (green) /
“MAN“ (red)
Indication area
C (in pF)
Switching area >>
Increase value coarse
Switching area >
Increase value ne
Switching area <<
Decrease value coarse
Switching area <
Decrease value ne
Switching area Bypass
Selection “Pass“ / “Bypass“
Switching area Store
Switching area Reset Tuner

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
Deviating from the antenna registered as standard for a respective
band (see 5.2.3 Antennas), also an another antenna can be choosen by
touching switching area Actually Choosen Antenna.
Indication area Actually Choosen Antenna displays the standard antenna
for the current frequency in green and each other antenna in red.
When changing the frequency, the antenna tuner always uses the setting
values determined for the standard antenna first.
If an alternative antenna shall be used for the selected frequency range,
choose a corresponding antenna by touching switching area Actually
Choosen Antenna.
Therefore up to 4 different setups can be stored for the same tuning seg-
ment and be called up, according to the number of antennas connected.
6.2 Input Power for tuning
For a automatic tuning process of the antenna tuner, the input power must
be in the range between 4 W (min.) and 39 W (max.).
Outside this power range, the
switching area Tune button is not activated
and remains dark blue (= tuner inactive)).
►Adjust input power between minimal 4 W and maximal 39 W.
►Select CW or FM mode on your exciter.
►Start to send.
►Tap at switching area Tuner Reset, to reset values for L and C
to “zero“.
►Tuning of Lby tapping at switching areas
> Increase value ne (+0,08 uH)
>> Increase value coarse (+0,80 uH)
< Decrease value ne (-0,08 uH)
<< Decrease value coarse (-0,80 uH)
►Tuning of Cby tapping at switching areas
> Increase value ne (+5 pF)
>> Increase value coarse (+50 pF)
< Decrease value ne (-5 pF)
<< Decrease value coarse (-50 pF)
The results of the tuning can be seen by the value for SWR displayed in
indication area SWR.
Finish manual tuning process:
►Stop to send.
►Tap at switching area Store to save the settings for the current
antenna / frequency combination.
Switching area Store ashes 2x briey to indicate the storing process.
6.3 Manual tuning
To manually detect and save a tuner configuration and settings for a given
antenna / frequency combination, proceed as follows:
►Tap at switching area Tuner Mode, until “MAN“ is displayed in
red .
At manual tuning the antenna tuner can be configured both as high pass
and low pass.
►Tap (repeated) at switching area Kfor tuner conguration as a
high pass lter:
►Tap (repeated) at switching area Kfor tuner conguration as a
low pass lter:

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
6.4 Automatic tuning
For automatic detection and to save a tuner configuration and settings
for a given antenna / frequency combination, proceed as follows:
►Tap at switching area Tuner Mode until the the switching area
appears red and “MAN“ will be displayed.
►If the antenna tuner is bypassed, tap at switching area Bypass until
“L“ and “C“ are displayed.
►Adjust input power between minimal 4 W and maximal 39 W.
►Tap at switching area Tune. The color of the switching area changes
from dark blue to light blue, indicating that the antenna tuner is
now active.
A full tuning process is triggered by a longer touch (about 1 s) of swit-
ching area Tune:
A completely empty database requires a full tuning process that includes
all possible values and configurations; this tuning process takes about 28 s.
A normal tuning process is triggered by a tap at switching area Tune:
With already determined settings for frequencies that do not deviate
from the current working frequency by more than twice a segment size,
approx. 8 s are sufficient for a normal tuning process.
(At present, memory segmentation and querying the neighboring seg-
ments is not yet possible. The function will be activated in one of the next
firmware versions as part of an update).
An automatic tuning process will be performed and the settings of a suc-
cessful tuning will be stored in a database assigned to the antenna socket
used.
The results of the tuning can be seen by the value for SWR displayed in
indication area SWR.
►Tap at switching area Store to save the settings for the current
antenna / frequency combination.
Switching area Store ashes 2x briey to indicate the storing process.

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Operating and installation instructions RF-KIT Power Amplifier RF2K-S
6.5 Indication area Segment-Size
Indication area Segment-Size displays the usable segment width for a
stored setting in kHz. The term Segment-Size describes the frequency
range for which a stored setting can be used.
- The lower the transmit frequency, the narrower this frequency range
becomes.
- The higher the transmit frequency, the wider this frequency range beco-
mes.
Example:
The tuned frequency is f0= 3.675 MHz. For the 80 m band the Segment-
Size is 9 kHz. A tuner setting already determined for 3.678 MHz therefore
applies (rounded) for the frequency range
fSeGMeNTCeNTeR = 3.678 MHz ± fSeGMeNT-SIZe /2 = 3.674 - 3.682 MHz.
If you you leave fSeGMeNTCeNTeR = 3.678 MHz and tune your exciter to f0= 3.675
MHz, the deviation to fSeGMeNTCeNTeR will be displayed.
The deviation to fSeGMeNTCeNTeR is -3 kHz, as displayed in (Dist:) in the
screenshot above.
A valid tuning process will be confirmed by display of “Match!“
If the deviation from the center of the currently used tuning segment
is more than fSeGMeNTSIZe /2, then the antenna tuner changes to the settings
stored for the next available tuning segment in tuning direction.
If the following segment has not yet been assigned to a setting, the color
of indication area Segment-Size changes from green to yellow.
From a difference of more than twice the segment size to the next seg-
ment with valid settings stored, the antenna tuner warns with the note:
“no match found!“.
NOTE:
If the antenna tuner is activated, but no valid
tuning data is stored yet for the used frequency,
transmitting is not possible!
Therefore no transmission is possible without successful antenna tuning
process.
fSeGMeNTCeNTeR
3,678
fSeGMeNTLIMIT
3,674
fSeGMeNTLIMIT
3,6823,670 3,685
Tuning process
required
Setting available,
no tuning required
f0
Tuning direction
Setting still acceptable,
tuning possible
Segment A Segment B Segment C Segment D Segment E Segment F Segment G Segment H
Setting still acceptable,
tuning possible
• Segment C
and D refer to the stored setting values of Segment B.
• Segment F
and E refer to the stored setting values of Segment H.
•
To transmit at a frequency in Segment E a tuning process is necessary.
(At present, memory segmentation and querying the neighboring
segments is not yet possible. The function will be activated in one
of the next versions as part of an update).