Category: QRP

Building a Direct Conversion Receiver: Part 4

We last left off with having built the Diode Ring Mixer portion of the DC40 direct conversion receiver that we started on in Part 1. As was discussed, the Diode Ring Mixer accepts input from two sources: The antenna (through a Band Pass Filter) and the VFO. Now it’s time to examine these two critical …

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Building a Direct Conversion Receiver: Part 3

In the first installment, we talked about choosing a Direct Conversion receiver design to build and getting started with the most basic parts. Part 2 dove into Manhattan construction and building the amplification stages. For this third installment, we’re going to discuss the functions of the Diode Ring Mixer, Band Pass Filter, and VFO stages. …

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Building QRP Labs Band Pass Filters: 3 Tips you should know!

QRP Labs Band Pass Filters are these wonderful little kits that largely take all the question of building a filter. They use a proven design, the kit includes the inductors and wires, and the build instructions are top notch.  One thing I love about the QRP Labs Band Pass (and Low Pass) filter kits is that …

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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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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!

Today we’re going to talk about JS8Call. What’s JS8Call? 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 …

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Building the QSX PA: First Impressions

As shown in A Previous Post, the QRP Labs QSX is on its way. It’s a SDR based all mode HF rig, 80m through 10m. It’ll be digital ready, too which is very cool! Recently we looked at what it’s going to take to build the QSX, and in this post we’re going to actually start …

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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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