Top Banner
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 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.
17

OPERATION - QSL.net

Dec 29, 2021

Download

Documents

dariahiddleston
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 1: OPERATION - QSL.net

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.

Page 2: OPERATION - QSL.net

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

Page 3: OPERATION - QSL.net

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.

Page 4: OPERATION - QSL.net

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.

Page 5: OPERATION - QSL.net

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

Page 6: OPERATION - QSL.net

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

Page 7: OPERATION - QSL.net

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

Page 8: OPERATION - QSL.net

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

Page 9: OPERATION - QSL.net

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

Page 10: OPERATION - QSL.net

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

Page 11: OPERATION - QSL.net

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

Page 12: OPERATION - QSL.net

11

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

Page 13: OPERATION - QSL.net

12

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

Page 14: OPERATION - QSL.net

13

7. Download XLoader file -https://www.km3km.com/downloads

8. Open WinRAR File

9. Run XLoader.exe

10. Explore the file (.hex) and select

Page 15: OPERATION - QSL.net

14

11. Select Nano AT mega 128

12. Select the Port (You can see the assigned Arduino port in Window Device

Manager)

Page 16: OPERATION - QSL.net

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

Page 17: OPERATION - QSL.net

16

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.