Main Menu

HAM Projects

Uncategorised

OH8LQ

Details
Written by: Jari Ojala
Category: Uncategorised
Hits: 14644

 

QSL info

OH8L    LoTW, OQRS and direct (SASE)

OH8LQ Lotw and direct (SASE)

OG73X LoTW, OQRS and direct (SASE)

 IMG_2634.jpg

Diplexer

Details
Written by: Jari Ojala
Category: Uncategorised
Hits: 204

20250704_100801.jpg

 

 

 

20250704_100826.jpg

 

 

 

Control board I/O and calibration list

Details
Written by: Jari Ojala
Category: Uncategorised
Hits: 432

Pin

Description

Remarks

1

50 V on active LOW

Output open collector

2

Shutdown active LOW

Output open collector

3

Fault reset active LOW

Output max. 3.3 V

4

GND

  

5

GND

  

6

Current meas module A 0-10 V

Output analog

7

Over current module A active LOW

input max. 3.3 V

8

Shutdown active LOW

Output open collector

9

Current meas module B 0-10  V

Output analog

10

Over current module B active LOW

input max. 3.3 V

11

Shutdown active LOW

Output open collector

J1 Connector Vds control module A-B

Pin

Description

  

1

50 V on active LOW

Output open collector

2

Shutdown active LOW

Output open collector

3

Fault reset active LOW

Output max. 3.3 V

4

GND

  

5

GND

  

6

Current meas module C 0-10 V

Output analog

7

Over current module C active LOW

input max. 3.3 V

8

Shutdown active LOW

Output open collector

9

Current meas module D 0-10 V

Output analog

10

Over current module D active LOW

input max. 3.3 V

11

Shutdown active LOW

Output open collector

J2 Connector Vds control module C-D

1

GND

  

2

BIAS ON module A Switch bias voltage on. PTT delay 20 ms

Output Active LOW

3

+12 V

Output

4

LM35_A analog in

Input

5

+5 V LM35 Vcc

Output

6

GND

  

7

+12 V

Output

8

BIAS ON module  B. Switch bias voltage on. PTT delay 20 ms

Output

9

GND

  

10

NC

  

J3 Connector bias module A

 

 

1

GND

  

2

BIAS ON module  C. Switch bias voltage on. PTT delay 20 ms

Output Active LOW

3

+12 V

Output

4

LM35_B analog in

Analog Input

5

+5 V LM35 Vcc

Output

6

GND

  

7

+12 V

Output

8

BIAS ON module  D. Switch bias voltage on. PTT delay 20 ms

Output

9

GND

  

10

NC

  

J4 Connector bias module B

1

Reflected 0-13 V  (400 W à2,826)

Input

2

Forward 0-13 V   (3200 W à7,994V)

Input

3

GND

  

J5 Connector Power sensor

1

Vds scaled

Input

2

GND

  

J6 Vds scaled 0-3.3 V

1

+12 V

  

2

Relay (open collector)

Output

J8 Connector J8 RTX-relay control

1

PTT active LOW

Input

2

GND

  

J7 Connector  PTT

1

GND

  

2

Serial RX TTL 5V

Input

3

Serial TX TTL 5V

Output

4

+5 V 1.5 A

  

J9 Connector Nextion display

1

NC

  

2

GND

  

3

PTT

Input

4

TX INH

Input

5

GND

  

6

NC

  

7

BAND A

Input

8

NC

  

9

BAND B

Input

10

NC

  

11

BAND C

Input

12

NC

  

13

BAND D

Input

14

GND 1

  

15

TX INH

Input

16

NC

  

J10 Yaesu Linear port

1

+12 V

  

2

160 m (open collector)

Output

3

80 m (open collector)

Output

4

60 m (open collector)

Output

5

40 m (open collector)

Output

6

30 m (open collector)

Output

7

20 m (open collector)

Output

8

17 m (open collector)

Output

9

15 m (open collector)

Output

10

12 m (open collector)

Output

11

10 m (open collector)

Output

12

NC

  

J11 LPF control

1

FAN+ 5-12 V temperature controlled A

Output

2

GND

  

J12 FAN power

1

FAN+ 5-12 V temperature controlled A

Output

2

GND

  

J13 FAN power

1

FAN+ 5-12 V temperature controlled A

Output

2

GND

  

J14 FAN power

1

FAN+ 5-12 V temperature controlled B

Output

2

GND

  

J15 FAN power

1

FAN+ 5-12 V temperature controlled B

Output

2

GND

  

J16 FAN power

1

FAN+ 5-12 V temperature controlled B

Output

2

GND

  

J17 FAN power

1

+12 V 2 A

Input

2

+5 V 500 mA

Output

3

+3.3 V 500 mA

Output

4

GND

  

J18 Power connector

1

Power signal 0-3.3 V

Input

2

GND

  

J22 Harmonic load power sensor

1

Closing relay max 1 A

Output

2

COM

Output

J23 Vds Power supply control

 

1

REFL

Input

2

REFL

Input

3

FORW

Input

4

FORW

Input

5

GND

  

6

GND

  

J24 WaveNode sensor MiniDIN

1

+12 V

  

2

Input ATT control 1 (open collector)

Output

3

Input ATT control 2 (open collector)

Output

4

Input ATT control 3 (open collector)

Output

5

GND

  

J25 Input attenuator control

1

Forwarding power 0-10 V

Input

2

Reflected power 0-10 V

Input

3

GND

  

J26 LPF-fault sensor

1

Shutdown active LOW

input

2

Input over power detected active LOW

input

3

Fault reset active LOW

output

4

GND

  

J27 Input over power protection

1

BAND signal 0-10 V

Input (ICOM band voltages)

2

GND

  

J28 ICOM band selector

1

RXD

Input

2

GND

  

3

ESP_PD (power down)

Output

4

NC

  

5

NC

  

6

NC

  

7

+3V3

Output

8

TXD

Output

J29 ESP32 Wifi module

J19

+3V3 to Arduino

No Connect

J20

+5 V to arduino

No connect

J21

+ 12 V Vcc to Arduino

Closed (feed 12 V to Arduino)

Jumpers (set arduino voltages)

 

Calibration

Trimmer

Adjustment

Cause

R9

Over Power

Set point to shutdown amplifier

R10

Ids A Calibration

Display bar level setting

R19

Ids B Calibration

Display bar level setting

R23

Hi SWR Calibration

Set point to shutdown amplifier

R29

Ids C Calibration

Display bar level setting

R30

Ids D Calibration

Display bar level setting

R31

Vds measurement calibration

Display bar level setting

R32

Vds Upper limit calibration

Set point to shutdown amplifier

R75

Max temperature A-sensor

Set point to shutdown amplifier

R76

Max temperature B-sensor

Set point to shutdown amplifier

R113

LPF Fault SWR detection

Set point to shutdown amplifier

Trimmers

Nextion LDMOS amplifier GUI

Details
Written by: Jari Ojala
Category: Uncategorised
Hits: 1412

Download TFT-file for Nextion 5" NX8048P050_011 and 7" NX8048P070_011 displays.

 

 

 

ScreenHunter_65_05.png

 

5" display frame 3D model (STL)

 

 

 

 ScreenHunter_66.png

7" display frame 3D model (STL)

ScreenHunter_37.png

 

The amplifier's user interface is a graphical touch screen.

All amplifier functions and settings are controlled via the screen.

 

 

20250406_104329.jpg 

User main view.

 

 ScreenHunter_46.png

Bar graph of four FETs or current.

 

 

ScreenHunter_47.png

 Bar graph of two FETs or current.

 

 

ScreenHunter_48.png

Bar graph of a single FET or current.

 

 

 

 

ScreenHunter_65_02.png

Usage history and settings selection.

 Band data, amount of the current bars, bar display max. limits.

Selection of allowed bands and selection of additional input attenuation.

Page 1 of 11

VIDEO

Other projects

Presentations