Monday, July 27, 2009

My 24Amps 13.8V Modified Regulated Power Supply

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I just brought my new Steady-Volt 24Amps, 13.8Volts power supply that cost several thousand bucks at RadioCom somewhere there in Pasay. ...
8 comments:
Monday, June 8, 2009

Homebrew your 4:1 Coaxial Balun

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When the antenna has an input impedance of 300 ohms balanced line, the 4:1 coaxial balun easily transforms this to match with our 50 ohms un...
1 comment:
Sunday, November 23, 2008

The VHF J-pole antenna

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The J-pole antenna earned its name as one of the most popular VHF antenna because of its simplicity and its considerable gain when compared...
Thursday, September 11, 2008

Regulated 15 Amps. Power Supply

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This project is very simple to construct using cheap few components and easy circuit lay-out. Regulation of this project uses the fixed 3 te...
Thursday, August 21, 2008

3 Elements 2-Meter Yagi Antenna

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This antenna project uses another approach in feeding the driven element. Instead of using gamma-feed dipole as its driven element, it uses ...
Monday, August 4, 2008

Simple Over-Voltage Protection For Regulated Power Supply

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This little protection circuit can be very useful in protecting your transceiver unit. I was able to design this circuit out from my ho...
3 comments:
Sunday, July 20, 2008

VOX Type PC to Radio Interface for Internet Link

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The usual two meter radio communication is very limited when talking about coverage distance. This is due to the fact that at VHF frequencie...
9 comments: