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HamRadio.My

Ham Radio, Fun Facts, Open Source Software, Tech Insights, Product Reviews

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May 14, 2012
amateur radio android CW digital signal processing dsp filter hamradio morse code

DSP Audio Filter For Android

The DSP Audio Filter is a tool that enables you to filter frequencies from an…

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November 20, 2011
amateur radio antenna emi filter high frequency magnetic power radiation radio receiver source switching mode power supply transceiver

Switching Mode Power Supply (SMPS) Interference

1. Why are Switched Mode Power Supplies (SMPS) associated with radio interference? Switched mode power supplies…

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June 20, 2011
amateur radio duplexer filter homebrew radio frequency repeater VHF

Duplexer

A duplexer is a device that allows bi-directional (duplex) communication over a single channel. In…

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June 20, 2011
amateur radio cavity duplexer filter VHF

What Is Cavity Filter

Cavity filters are the basic circuitry behind a Duplexer and are sharply tuned resonant circuit…

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