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.

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...

3 comments:

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...

Home Brew 60W RF Dummy Load

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Another great way of making your own 60 watts dummy load is by the use of Caddock thick film power resistor. Purchased some of these at ...

Saturday, June 15, 2013

Jpole Antenna with a Twist

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Here is my own version of my Jpole antenna used in my ham station. Only the half wave radiator was exposed while the remaining quarter wa...

1 comment:

Saturday, August 25, 2012

Instant Dynamic Microphone. Almost!

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It is true that the FET microphone (EM-80), or the electret condenser microphone provides stronger audio level as compared to a dynamic mic...

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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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