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.

Sunday, January 28, 2018

DDS based VFO

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Another weekend project is this variable frequency oscillator based from dds chip. I found this project useful in my home brew dsb trans...

Sunday, November 12, 2017

Home Brew Static Wick

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By theory, this device bleeds excess voltage potential of your tower and thus minimize the risk of direct lightning strike. This device...

Monday, August 28, 2017

Diode Ring Mixer

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40m band is poor today and I want to listen to the AM broadcast band. However, my IC-M700TY HF transceiver can only go down to 2MHz. Upo...

4 comments:

Saturday, June 10, 2017

180W Pallet Amplifier Using MRF9180

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This is my first time to play with the 180W pallet amplifier kit from China. The kit comes with only a printed schematic but there was no...

30 comments:

Sunday, December 18, 2016

7MHz VFO using 3.58MHz Ceramic Resonator

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This project is a 7MHz vfo that uses a 3.58MHz ceramic resonator. The oscillator output is fed to a frequency doubler but the output of...

1 comment:

Tuesday, April 5, 2016

QRP RF Voltmeter from your Junk Box

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A useful tool that can be easily crafted out from your junk box is this rf voltmeter. I discovered this circuit online and created a pr...

Sunday, March 20, 2016

40M DSB Transceiver

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The circuit described here is actually a variation of the MDT40 project by VK2DOB, A simple double side band suppressed carrier (D...

7 comments:

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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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