Thursday, September 12, 2024

Antenna Analyzer Impedance Calculations

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I just found this valuable information on the mathematics behind the modern antenna analyzer. The diagram was part of the May 2005 issue of ...
Friday, August 9, 2024

Resurrecting The Met One MSO Weather Sensor

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  We have three defective MSO weather sensors from Met One Instruments that have been sitting in the junk box for over 7 years. Upon checkin...
Tuesday, July 9, 2024

Measuring the Impedance of a UHF Quadloop

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  Quad loop antenna is indeed has a 100ohms impedance at the feed point. I tried to build a UHF version of the quad and sweep its frequency ...
Monday, October 16, 2023

DIY 30W Power meter using 10dB Attenuator

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  While browsing the internet I came across a 100W/10dB attenuator resistor with a surprisingly low price. This sparked an idea in my mind -...
Monday, September 11, 2023

Advantech WISE-4220-S231 IoT Wireless Module

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Today, I will be sharing the advantages of using IoT devices such as the Advantech WISE-4220-S231 wireless sensor. The  WISE 4220 series is ...
Tuesday, June 20, 2023

DIY Arduino Uno Data Logger

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Another great project that you can make with arduino is the datalogger. The basic design of a logger calls for a timer, a memory and convert...
Wednesday, September 28, 2022

Homebrew SWR / Power Meter for HF and VHF

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  A friend is asking if I can fabricate a low-cost SWR/power meter with accurate performance up to  144MHz. One of the designs I have attemp...