Tuesday, June 21, 2022

How do I started Amateur Radio.

Comming Soon

Sunday, June 12, 2022

What is out there ?

Been playing around with digital FT8 mode. Surprised me this is what I came across. May be moon bounce...







Monday, January 4, 2016

TESTING THE HF SSB TRANSCEIVER




HF SSB TRANSCEIVER (Also known as Radio JJ and Radio Nelayan)
  • Type : Amateur Radio
  • RF Output power : 25-100 Watts
  • Transmitter Final : MosFet IRFP150N push pull
  • Frequency Range : 80 to 20 meter
  • Supply Voltage    : 13.8 VDC
  • Current Drain    :  TX max 25 amp  RX 400mA (may varies)
  • Mode : SSB (LSB and USB)
  • Memory Channel Storage  : 19 Channels
  • Receiver Type  : Single Conversion 
  • Step 1Hz, 10Hz, 100Hz, 1Khz, 10Khz, 100Khz, 1 Mhz
  • Frequency Generator DDS AD9850
  • LCD Readout 16x2 Green Colour
  • RIT
  • Frequency/Channel Locked/Unlocked mode
  • Dual VFO
  • Analog meter for Signal Strength and RF Power level 
  • Built-in AGC
  • Built-in Mic Compressor 
  • Antenna impedance/connector : 50 ohms / SO-239
  • Antenna input : PL259
  • Weight : 3.9kg
  • Dimension : H 8.5 x  W 25 x L28.5 cm
  • Colour Black
  • Manufactured : Homebrew Bandung Indonesia 

Microphone connection
Pin 1 -  Mic +
Pin 2 -  Short with Pin 3
Pin 3 -  Short with Pin 2
Pin 4 -  NC
Pin 5 -  PTT +
Pin 6 -  Short witn pin 7 (GROUND)
Pin 7 -  Short with pin 6 (GROUND)
Pin 8 -  NC


Function 



PRESS ONCE
PRESS AND HOLD FOR TWO SECOND
MODE
CHANGING MODE  USB/LSB (AM,CW UNVERIFIED)
LOCKED/UNLOCK . THE DISPLAY SHOWS “ < > “
PRESS AGAIN FOR UNLOCK
MENU

PROGRAMMING MEMORY CHANNEL
VFO
CHANGING VFO A OR VFO B
DISPLAY WILL SHOW AN ARROW   -> “
(UNVERIFIED)
RIT
DISPLAY SHOWS “0.000” TURN DAIL FOR INCRESEMENT OR DECRESEMENT
WHEN IN VFO MODE
VFO A = VFO B or VFO B = VFO A
STEP
BY PRESSING STEP BUTTON. AN UNDERSCORE WILL BE PRESENT BELOW THE DIGIT. HOLD THE STEP BUTTON TO MOVE THE UNDERSCORE TO THE DIGIT FOR STEP. TURN THE DAIL TO MOVE THE UNDERSCORE LEFT OR RIGHT THEN RELEASE STEP BUTTON AND TURN DAIL KNOB.

MEM (MEMORY)
DISPLAY MEMORY CHANNEL
TRANSFER MEMORY FREQUENCY TO VFO


Programming Memory  channel. (MEM)
1. PRESS AND HOLD MENU BUTTON.
2. PRESS AND HOLD MEM BUTTON UNTILL “SAVE TO M “ APPEARS ON THE SCREEN THEN RELESED MEM  
    BUTTON
3. TURN DAIL TO SELECT MEMORY CHANNEL.
4. PRESS MEM BUTTON UNTILL “SAVING” APPEARS ON THE SCREEN
5. RELEASED MENU BUTTON


This is a Homebrew SSB Transceiver made from Indonesia -Bandung.
No specification or user manual but I will up date for more information near future. Easy to operate with less button and knob.

The price is affordable for newbies. It has very good audio quality on received with built-in AGC. During the test on transmit, I received a very good feed back with more to base audio quality.
There are few modification to enable the Transceiver having continuosly without any gap from 2.100 MHZ right up to 17.100 MHz. The Bandpass Filter (BPF) seem has limited ranges.

Some of you might thinking of using a Antenna Tunner for these radio. Do not whistle as that is bad attitude and could cause interference to others. You might try experiment with low pitch tone just enought to tune the antenna tunner. Used low power when tunning or else the final mosfet might burst.

End Feed antenna are built for low power transmissions or QRP and advisable not to used above 20 watts.

Experimenting with these radio are fun but when goes faulty do not get frustrated, there is always a way when there is a will.

Thanks for sharing and if there are more information and wish to shared with others, please e-mail me. 9m2da@marts.org.my and no spam please. Thank you.

TUTORIAL IDENTIFIKASI RF OUT PADA RADIO BITX (JJ RADIO TRANSCEIVER)

New HF JJ Mobile version
Nice homebrew "Little JJ"

Internal view

The 3 blue button are 
(button colour may varies)

1. Band switch -
Press once to change Band.
Long press nothing change.
BAND 1 - 2.000.00 to 4.999.00 (80m)
BAND 2 - 5.000.00 to 7.499.00 (40m)
BAND 3 - 7.500.00 to  14.499.00 (30m and 20m)
BAND 4 - 14.500.00 to 21.499.00 no function
BAND 5 - 21.500.00 to 30.000.00 no function

2. Mode switch 
Press once to switch mode USB or LSB.
On LSB mode Long press is BFO setting at 9.99650 (Do not change this figure if your number setting is different)
On USB mode Long press is BFO setting at 9.99880 (Do not change this figure if your number setting is different)

3. RIT / CLK
Press once for RIT.
Long press is CLK calibration set to 27.002.26 (Do not change if your setting is different)

Rotary Dail has two function. 
Press the knob for shift. Press again to
move the underscore.

RF power adjustable 0-100 watts PEP.

Size : W 17.2cm * H 7.4cm * L 23.1cm

SPEAKER is on Top chasing. The front right hand side look like speaker but it is not.


SPECIFICATION : as on FB
4 BAND AMATEUR RADIO READY BUILT KITS 
Power Output : 0 - 100watt PEP adjustable from front panel
Receiver : Single Conversion
Transmitter : Exiter BITX, Power Transistor Final TX using MOSFET
Band : 80, 40, 30, 20 meter band ( 4 band )
Mode : LSB dan USB
RIT     : step 10 ( Max. +500 Hz, Min. -500 Hz )
BFO    : LSB dan USB 
DDS type : Si5351
Band Pass Filter : 3 stages up to 15 MHz.
Mic Gain : available from front panel
RF Gain : available from front panel 
S-Meter : digital / bar 
Voltage input : 12 - 14 Volt
Microphone : Hand Mic included
DC cord : included

Monday, October 4, 2010

ICOM IC-706 ~ 706 MK 2 LCD

NEW LCD REPLACEMENT FOR YOUR ICOM 
IC-706 or IC-706MK2 
 

 Hi....if you have a difficulties viewing your dark display and need to change it, no worries. I have  them factory made OEM and ready in stock. Many ICOM IC706's lover have left their radio unused. Now you can cleaned it up and change the display.
Note: 
Some old version radios may be different.

ICOM IC-706 DS4 5010000171 LCD DLC 7973YBGF-1

ICOM IC-706 MK2 DS4 5010000210 LCD DLC 7986YBGF

In Stock 

Changing LCD Filter Polarizing Films of ICOM IC706 Mark 2G

Wednesday, May 5, 2010

Projects

Project - BEACON


Made one for 9M2IDJ..
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

My Homebrew Project - PIC KEYER
Circuit and Source code are from IK0WBR Website
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

My Homebrew Project
PIC PROGRAMMING INTERFACE BOX
I started homebrewing this just to program PIC for the ARDF Controller/Oscillator.
Later it seem more usefull then I thought....I started experimenting with others PIC project.
The dc supply are direct from the pc, that mean you do not need any external supply to run this circuit.
I used WinPic software. This programmer are only for PIC16F series...... The number 8,7,4,3 and 5 are connected to DB9 socket to PC ComPort.
IC pin 4 = TXD
IC pin 5 = Vss GND
IC pin 12 = RTS
IC pin 13 = DTR
IC pin 14 = Vdd
There are few circuit which is almost the same such as JDMPIC.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

My Homebrew Project - Radio Interface Box
(For Puxing, Kenwood TK series and others)



The 5 Volt DC may be supplied via your PC.
The Original RIB using MAX 233, since I have few MAX 232 in my junkbox, so this is the results.
I have used this to program my Puxing, Weierwie and Kenwood TK series.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This is parts of my homebrew project. There are others homebrew project which I have done.
Repeater CWID using PIC16F84 which is been allocated at 9M4RMR and 9M4RSG repeater.
HF Antenna tunner for my ICOM IC-718 (2009),
Motorola RIB to program GP300, GP328, GP338,GP2100,GP328Plus and other...
PIXIE II QRP 40 meter CW Transceiver....Have not try it out...
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

KGD("Kurz Geratener Dipol" ) SHORTY DIPOLE 
Looking for a simple short mono band dipole? There are several website explains how to make a very simple shortty dipole for those who have limited space.
Here you can go to the linked to few website which explains about the antenna.
http://www.nonstopsystems.com/radio/frank_radio_antenna_KGD.htm#top-of-page 
http://vk2rh.blogspot.my/p/kgd-antenna.html
http://blog.g4ilo.com/2010/04/amazing-kgd.html
  

THE CENTER LOADING OF SHORTY DIPOLE
L = NUMBER OF TURN OF COPPER WIRE
C = CAPACITOR USED IN PICOFARAD.
ALU = ALUMINIUM TUBING
TOP is my 10 meters Homebrew DELTA LOOP antenna and
BELOW is my 40 meter Homebrew SHORTY DIPOLE
 40 meter Homebrew Shorty Dipole ready to go.

A test with 40 meter half wavelength Inverted V antenna give S9 reports and
 the Shorty Dipole shows 20db over S9 on my S-meter.


MOXON DUAL BAND ANTENNA
Made from 7mm aluminium tubing. My first homebrew prototype has different measurement on VHF elements Due to the material used finally did it and send the sample to
 factory for mass production.  Thank you to all who have been using the antenna.

Good luck on satellite hunting.









Saturday, December 19, 2009

MARTS Radio Amateur Civil and Emergency Service







Download Message form Software and Digital Software suitable to your operating systems

Registered as RACES team members

Watch MARTS RACES Emcomm activities

Thursday, August 27, 2009

Kod Etika

                   
KOD ETIKA YANG PERLU DIMILIKI OLEH WARGA HAM


BERTIMBANG RASA : Tidak akan menggunakan frekuensi (memancar) untuk menimbulkan rasa ketidakselesaan kepada orang lain dengan secara sengaja.

SETIA : Akan sentiasa mewujudkan sifat setiakawan, menyumbangkan khidmat bakti kepada rakan dan kelabnya.

PROGRESIF : Akan sentiasa memastikan stesennya (radas dan peralatan) dan juga kaedah pengendalian yang diguna pakai berada dalam keadaan sempurna dan efisyen.

MESRA : Bersedia untuk melakukan transmisi dalam kadar yang sesuai dengan keperluan rakan yang lain, menghulurkan nasihat dan panduan kepada rakan baru, membantu dan memberi kerjasama sesama warga ham; semua ini adalah merupakan semangat warga ham yang sebenar.

MANTAP DAN SEIMBANG : Radio hanyalah satu hobi. Seorang ham yang baik tidak akan membiarkan hobinya menjejaskan tanggungjawab terhadap kerjayanya, rumahtangganya, persekolahannya (bagi warga rakan muda), atau terhadap masyarakatnya. Ia juga harus sedar bahawa ilmu dan kepakarannya mahupun stesennya adalah sentiasa tersedia untuk dilibatkan ke arah khidmat masyarakat atau negaranya.
(dipetik dari SOP)

******
Powered By Blogger