Tag Archives: software-defined radio

FDIM 2012: The YADI micropower digital interface

Posted on June 20, 2012 by Stephen Trier

Next in our tour of projects from the Four Days In May event at the Dayton Hamvention is an innovative radio-to-computer interface. The unique feature of YADI, Yet Another Digital Interface, is a micropower VOX circuit. This lets it sip … Continue reading →

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FDIM 2012: N8WE’s CW transceiver

Posted on June 13, 2012 by Stephen Trier

A few weeks ago, I went to the Four Days In May event at the Dayton Hamvention, and brought back some pictures of the cool projects I saw. Glenn Hazen, N8WE, brought his 20 meter transceiver project to show-and-tell night. … Continue reading →

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Choosing a high-performance audio ADC

Posted on September 13, 2011 by Stephen Trier

As I discussed two weeks ago, it is time to refocus my efforts on the DSP-based ham radio project that started this blog. Let’s take a look at the architecture I had in mind originally: This is a popular topology … Continue reading →

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The Plan

Posted on February 8, 2011 by Stephen Trier

I’ve been thinking for some time about a DSP-based ham radio. After
considering and discarding more grandiose schemes, I was inspired by my
Norcal 40A. It and the original Norcal 40 are fairly simple and highly
reproducible (thousands were built). However, performance was not
sacrificed in the name of simplicity. Instead, the rig was carefully
designed to make the most of its NE602 mixers and crystal filter.

Why not try for the same goals in a DSP-based rig? In theory, one should
be able to subsume all of the IF and most of the RF and baseband into…. Continue reading →

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