Do It Yourself

I like DIY very much. The following items are the project which are assembly, modify or design by me. I hope you will interested. If you have any problems and suggestions, please write down in my guest book or E-mail to me directly. Thank you very much. If you want to have the following information, schematic diagram and PCB layout, please E-mail to me.

How to DIY ?    

    Let me to show you how to DIY.   

DC Power Supply

    1) DC12V/24V 2.5A/5A Programmable Battery Charger.   

    2) 4.5V to 500V DC to DC Convertor.   

    3) 3V to 13.8V 3A DC Power Supply.   

    4) 28V to 50V 15A DC Power Supply.   

RF amplifier

    1) 2m band RF power amplifier with 50W output.

    2) 6m band RF power amplifier with 100W output.

    3) 6m band RF power amplifier with 300W output.   

Transverter

    1) 6m band to 20m band transverter. 

    2) 10m band to 2m band transverter.   

    3) 2.4GHz to 144MHz down convertor.   

    4) G3WDG 2.4GHz to 144MHz down convertor.   

Antenna

    1) 6m L-Dipole.   

    2) Long Wire Antenna.   

    3) HF Long Wire Antenna.   

    4a) Assembly the 2.4GHz 40 elements Helical Antenna.   

    4b) Testing the 2.4GHz 40 elements Helical Antenna.   

Accessories

    1) band pass filter for antenna analyzer

    2) field strength meter with attenuator

    3) SSTV interface

     4) Car Whip Antenna Mount   

     5) 500W Dummy Load   

     6) Paddle Key   

     7) External Speaker with Passive Filter  

     8a) Portable Antenna Tuner (assembly and information)  

     8b) Portable Antenna Tuner (result and problem during test  

     9) 2.4GHz 4 to 1 Power Splitter  

Mod

    1) Increase the output volume for the MFG-418 Morse code tutor.   

Other

    1) AC Outlet with Radio Remote Control   

    2) 80W x 2 RMS Stereo DC Audio Power Amplifier   

    3) 6SN7 + 6DN7 Stereo Audio Vacuum Tube Pre-Amplifier