Category: Electronics

Building a Direct Conversion Receiver: Part 2

In the first installment of this series, we discussed why we’re building a Direct Conversion receiver and talked about some basic ideas. In this installment, we explore what it takes to make the leap from a printed schematic to something physical that works. Follow along! Schematic Semantics The DC40 was originally designed by Ashhar Farhan …

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Building a Direct Conversion Receiver: Part 1

QRP Labs VFO, bare PCB with just the audio amplifier stage and a power strip to the left side of the board.

In this series of posts I’m going to take you on a journey. We’re going to explore the Direct Conversion receiver together, and I’m going to show you every bit of the journey that I can. Let’s get started! Why build a Direct Conversion receiver? When I restarted in ham radio in December 2016, it …

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QRP L-Match Tuner Build

In this post we’re going to build an L-Match tuner for your QRP wire antenna. But you might ask: Why do I need a box between a bit of wire and my transmitter? That’s a good question! Amateur radios are constructed in such a way that they have an impedance of 50 ohms. For portable use …

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Getting Started with JS8Call – One of best things going in Digital HF!

If you’re a ham radio operator on HF, then you likely know all about FT8 and what it’s done for (or to, depending on your perspective…) amateur radio. It’s made a simple 5 watt QRP station capable of truly worldwide contacts! Here in Washington State, I have worked many Pacific Rim countries including Japan, New …

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Is QRP Saving Ham Radio?

Recently on HackADay.com there was an article called “FT8: SAVING HAM RADIO OR KILLING IT?” which drew fire from some and praise from others. The article title itself was a little click-bait-y but justifiable. According to the source article over at flexradio.com FT8 lovers and haters are split almost 50/50. Some say its awful because FT8 …

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