Ryan Flowers

Author's posts

QSX Update: Spectrum Analyzer!

For those of us anticipating the release of the QRP Labs QSX (which we talked about in A Previous Post), any news from Hans Summers, the owner of QRP Labs, is exciting. He posted an update over the weekend that will whet the appetite a bit. If you’re unfamiliar with what a spectrum analyzer does, …

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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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Replacing Relays in the BITX Radios

In this post, we’re going to show you how you can replace the relays in a BITX40 radio. You can use the same method to replace the relays in your uBITX too. Use caution and common sense when doing this. Here’s a link to the relays I used: If you’re using the Axiom relays for …

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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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