du1vss (D.I.Y.)

It's all about ham radio. Although some of my projects involved transmitters, rf amplifiers and antennas that operate outside the ham bands, these things are solely for educational purpose only and experimentation.

Monday, June 30, 2014

Experiment With Different Wind Turbines

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Two months ago I was tasked to build a wind generator that can be use to charge batteries and power LED lights here in our main office. The ...

Thursday, June 5, 2014

Callsign Plate

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Beautiful callsign plate which I got from Philippine Amateur Radio Association (PARA) last year. The price is much cheaper than the one f...

Saturday, May 31, 2014

100W Dummy Load

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A 100W quick and easy rf dummy load using a 100W 50ohm Caddock thick film power resistor. The large aluminum heatsink was bought at Rox Elec...

Wednesday, April 16, 2014

LM35 Thermometer Project

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LM35 is a precision IC temperature sensor with an output voltage linearly proportional to the Centigrade temperature. Thus for a 0 to 10...

Friday, January 31, 2014

Stripline SWR Meter

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Another weekend project that I made is this SWR (Standing Wave Ratio) meter which rf pick-up is a directional coupler fabricated from mi...

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Saturday, November 9, 2013

Two Stack Dipole Using Power Divider

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My friend ask me If I can make a two stack dipole for his 92.9MHz FM station and I decided to construct this project using ...

Saturday, July 6, 2013

Switch Mode Power Supply Unstable Output Cure

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I got this switch mode power supply from a friend and my plan was to use this on my 80W linear amp. Things went the other way when I t...

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About Me

hevirred: Hello, I'm Vir, a ham radio operator with a callsign of DU1VSS. I hope you find this blog useful and interesting. Feel free to send me an email if you have questions about my project. Thank you and 73. hevirred@gmail.com

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