operation - qsl.net
TRANSCRIPT
OPERATION
GUIDE AFTER ASSEMBLY
FEATURES
• Solid state amplifier
(MRF1K50H)
• 1.8- 54Mhz
• RF Band Decode
• Output 1200 Watts
• 7 Inch Touch Color
Screen
• FWD/SWR Meter
• Di Voltage/Di Current
Meter
• All Protections
• Integrated Power
Supply 120-240v
• Antenna Selector
Switch
• W12 x L13.5 x H5.5
inch
• Weight 26 pounds
Kenny
This device is not an Intentional RF Radiator. This device available only in
separate pieces. The recipient is responsible for assembling and complying
with FCC rules. Is designed for educational, experimental and development
purposes of Amateur Radio. Accessory for communication in cases of natural
disasters and emergencies at the service of Amateur Radio.
1
Index
LDMOS Explain…………………………………………………………Page 2
Operable Capability …………………………………………………... Page 3
Quick Start Guide……………………………………………………….Page 3
Display Functions ………………………………………………………Page 4
Rear Panel Layout………………………………………………………Page 5
Band Selector……………………………………………………………Page 5
Output Power (ALC)…………………………………………………….Page 6
Temperature and Cooling Fans………………………………………..Page 7
All protections……………………………………………………………Page 8
Antenna switch with programmable…………………………………...Page 9
Internal settings………………………………………………………….Page 11
Arduino Firmware Update………………………………………………Page 12
Display Firmware Update……………………………………………….Page 16
2
LDMOS Explain
LDMOS (laterally diffused metal oxide semiconductor [1]) transistors are used in
microwave/RF power amplifiers. These transistors are often fabricated on p/p+
silicon epitaxial layers. The fabrication of LDMOS devices mostly involves various
ion-implantation and subsequent annealing cycles.[1] As an example, the drift
region of this power MOSFET is fabricated using up to three ion implantation
sequences in order to achieve the appropriate doping profile needed to withstand
high electric fields.
Silicon-based LDMOS FETs are widely used in RF power amplifiers for base-
stations as the requirement is for high output power with a corresponding drain to
source breakdown voltage usually above 60 volts.[2] Compared to other devices
such as GaAs FETs they show a lower maximum power gain frequency.
Ampleon USA Inc:
The next test of ruggedness is with a controlled load mismatch through all phases,
enabled by the test fixture now in view. The mismatch unit is connected to a
network analyzer. Through a network control we can set it to work through all
phases of the Smith chart. This mismatch unit will create voltage standing waves
with ratios from 55: 1 up to a maximum of 125: 1. With the normal situation,
standard, 50 volts 1200 watts into a 50-watt load, so at this moment the amp is
operating at full power. The mismatch unit now replaces the dummy load
connected to the output of the amp and the test set up is powered up again. The
mismatch unit is now varied to expose the LDMOS transistor to a range of extreme
mismatch conditions and positions on the Smith chart. The extreme conditions vary
from VSWR from 55: 1 to 125: 1. Now we show the transistor is still alive by going
back to the original load and showing the 1200-watt output power. It still works.
Would you ever treat a transistor worse than this? Check out the next test.
Even though the transistor is normally used at 50 volts, we test at 55 volts to
challenge the extremely rugged LDMOS. We set up the transistor at 55 volts 1200
watts into 50 ohms. We disconnect the output load creating a very unfriendly open
circuit situation. We power up the transistor to 1200 watts. We screw the short to
the output of the amp while the transistor is powered up. We go back to the 50-
ohm load and power up the transistor to 1200 watts and we see that it again
survives and works perfectly. This is what we mean by extremely rugged. This
transistor seems to be unbreakable.
3
Operable Capability
160-6 M ,700 watts continuous carrier and 1200 watts SSB mode
The low pass filter design for Amplifier KIT are based 6 frequency ranges on Hf
and one for lowest part of VHF in amateur radio bands: 160 80/75 60/40 30/20
17/15 12/10 and 6 meters. For this we have used 7-pole Chebyshev type filters for
the segments below 10 MHz and the 6-meter band, Chebyshev 5 poles for the
rest. The main aspects of the Chebyshev filter are that it has an abrupt drop. It
reaches its final drop faster than other forms of filter. Therefore, it is widely used in
RF applications where a pronounced transition between the passband and the
stopband is required to eliminate unwanted products, such as harmonics
intermodulation. The goal was to achieve an attenuation for the third harmonic of
-43dB or higher in each of the HF segments . This attenuation factor complies with
the FCC specifications.
Quick Start guide
• Connect the amplifier to a 120- or 240-volt AC outlet.
• Connect the output of the Ant-1 amplifier to a 50-ohm load or the corresponding antenna.
• Connect the RF IN input of the amplifier to the RF output connector of the radio station.
• Connect the RCA PTT terminals to the radio.
• Put the radio to the minimum power.
• With SSB Modulation gradually increase power.
•
Warning: Input power less than 25-watts for (RTTY, CW, AM, FM,
DATA) Modes.
4
Display Functions
A. FWD Power Meter Output (pep).
B. SWR Meter Output or REF.
C. Drain Current Meter.
D. Temperature Indicator °C.
E. Drain Voltage Meter.
F. Alarm Indicators Zone.
G. Transmission Indicator.
H. Antenna Switch zone.
I. Protections and Alarms Reset Button.
J. Band Select Buttons zone.
K. Automatic Segment Indicator.
L. Automatic or Manual Fan Control Button.
I
M K L
H
F
B
D
G
E
C
A
J
5
Rear Panel Layout
1. SO239 Antenna 1 Default.
2. SO239 Antenna 2
3. SO239 Antenna 3 (VHF Recommended).
4. RCA Plug ALC to Radio.
5. RCA Plug PTT Key to Radio.
6. SO239 RF Input Driver.
7. ALC adjustment fits Philips.
8. IEC 320 C14 AC Outlet.
9. Ground connection.
3 2 1 4 5
6
7
9
8 N
6
Band Selector
Default Automatic selection at startup activates the RF Band Decoder (1). The
signal emitted by the radio selects the appropriate Low Pass Filter segment. Display sample (2) shows automatically selected segment indicator. Keep in mind
that in SSB mode the radio will not emit RF until it modulates, 200 milliwatt are
necessary to detect the current frequency it is worth noting that some radios make
a small click when you press PTT, this is enough to detect the appropriate segment
quickly. The ON AIR transmission sequence takes 25 milliseconds.
You can also select the segments directly on the TFT buttons, the RF decoder will
be disabled. The ON AIR transmission sequence takes 15 milliseconds. (Manual
selection recommended for CW mode). Never use in CW full break-in mode.
If you manually select an incorrect segment, the protection pulls the amplifier
down, the display shows ERROR LOW PASS FILTER (3)
For recovery, correct the selected segment and press the Reset button (4)
2 1
4 3
7
Output Power (ALC)
The amplifier provides output power 1000-1200 Watts in HF bands. For 50 MHz,
the output power does not exceed 900 watts. The input level is different in each
segment, I recommend the use of ALC for constant output in all bands without
regulating the input power. Next explanation of LAC adjustment for maximum
power:
1-Connect an RCA-type cable from the ALC port on the amplifier (1) to the ALC
port on the radio. Some radios do not have an RCA-type output for ALC.
2-Turn regulator completely to left (2).
3-Set the radio output to 40-60 watts. 20-Meter band is recommended for
adjustment.
4-Begin to modulate and pull the regulator to the opposite side, note that the power
will be low and start to rise (2).
5-Stop when you see the level bar in peaks of 1000 watts approximately. The
adjustment may be narrow in some radios.
Warning: Input power less than 25-watts for (RTTY, CW, AM, FM,
DATA) Modes.
1
2
1
8
Temperature and Cooling Fans
The temperature is constantly monitored and show on the Display (1). If the
temperature is <50°C the cooling fans turn 30% permanent. When the temperature
is> 50°C, the fans automatically accelerate to 100% and return to 30% when the
temperature is = 45°C. The fan control button (2) sets the fan to permanent
Maximum speed, this option is recommended for prolonged operation.
When the fan speed is 100%, it is shown in the area of the display indicator (3).
If the temperature is> 65°C degrees, the system goes to Cool Down (4), the
recovery is 55°C.
1 2
3
4
9
All Protections
Despite the robustness of an LDMOS amplifier device, it is necessary to protect
the circuits to avoid damage caused by user malfunction and accidents. Ensuring
the correct handling of the user and extends the life of the device.
The error indicator area (1) derives several ads on the same tab (2).
ERROR SWR: The Amplifier stop when SWR is> 2.0 or REF >125 Watts. Note;
with a power output of 1200 watts the reflected will be133 watts. For recovery
check the antenna and press RESET.
ERROR LP FILTER: The Amplifier stop when segment selection is wrong. For
recovery check the selected segment and press RESET.
ERROR PWR 700 WATTS: With Carrier Continuous> 700 watts more than 8
seconds The Amplifier makes a stop. For recovery reduce RF input and press
RESET.
ERROR PWR: The amplifier stops if the output power is> 1300 watts. For recovery
reduce RF input and press RESET.
ERROR HI CURRENT: The amplifier stops if the drain current is> 37 amps, or
SWR is high. For recovery reduce RF input and press RESET.
ERROR HI VOLTAGE: The solid-state switch does not deliver if the voltage is> 55
volt. For recovery turns off and, on the amplifier, if the problem continues it is a
fault in the device.
ERROR TEMP: If the temperature is> 65°C, the system goes to Cool Down, the
recovery is <55°C.
1
2
10
Antenna switches
Manually select three amplifier antenna outputs (1). This selection is not
remembered after turning off the amplifier.
The setup button (2) displays the automatic antenna selection board. Configure
the three antenna outputs for each segment. The configuration remains in
memory. Antenna 1 default for all segments.
Note: If one of the configured outputs does not have an
antenna connected it can cause severe damage to
components.
1 2
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Internal Settings (if required)
The correct measurement of FWD and SWR may be affected if
you connect a SWR meter at an intermediate point on the antenna
line.
To adjust the Meters, I recommend:
Output Power Meter reference 1000-watts REF <10 watts SSB
mode. Potentiometer (1) CCW +.
SWR Meter Reference 1000-watt output power and SWR 2.0 SSB
mode. Potentiometer (2) CCW +.
For the Drain Current Meter, I recommend:
Reference 35 Amps. Potentiometer (3) CCW +
1 2 3
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Arduino Firmware Updates (if required)
1. Remove the Arduino Nano Module from the controller board
2. Use a Mini USB cable and connect Arduino to the PC
3. Download Arduino Nano Drivers file https://www.km3km.com/downloads
4. Open WinRAR File
5. Run SETUP.EXE
6. Run Install
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7. Download XLoader file -https://www.km3km.com/downloads
8. Open WinRAR File
9. Run XLoader.exe
10. Explore the file (.hex) and select
14
11. Select Nano AT mega 128
12. Select the Port (You can see the assigned Arduino port in Window Device
Manager)
15
13. Run Upload tab
The load does not exceed 10 seconds. If (Uploading ...) takes a long time, repeat
the process and type 115200 (1) Baud.
Congratulation, Arduino was updated:
1
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Display Firmware Update (if required)
1. Clean or format an SD Card memory
2. Copy the file (.tft) to the SD card
3. Display off, Insert the SD card into the SD slot
4. Turn on Display
The display will take several seconds:
Congratulation, Display was updated:
Turn off the Display and remove SD Card.