Tag Archives: building

A key repair.

Back at the beginning of November I happened to be in the local Barnes & Noble bookstore on a Sunday afternoon, when I noticed signage for the “Mini Maker Faire” event B&N was holding the following weekend. My initial reaction … Continue reading

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2B Redux

My infatuation with boat anchors has begun to reassert itself this summer, with the sudden acquisition of a Drake-2B receiver. I like working with separates: a tube transmitter like the W1TS Simple TransmitterĀ or the QRP Blowtorch, and a vintage receiver … Continue reading

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The QRP Blowtorch Rides Again

Summer in the Northeast is the perfect embodiment of the 80 / 20 rule: we get 80 percent of our outdoor activities in during the 20 percent of the year when the weather is nice. We really are having a … Continue reading

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Not a tube project, version 1.1

This is just a brief update to last week’s post about the 3 band VFO sketch for the Si5351 breakout board and Arduino. Software never stands still…. Working with Joel Caulkins, KB6QVI, who generously expressed an interest in the sketch … Continue reading

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Definitely not a tube project.

Lately I have been having lots of fun working on a variety of different bench projects, all involving very different technologies, switching between them as parts arrive and time allows. I have been experimenting with space charge tubes, with the … Continue reading

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Is there a pentode in the house?

I’ve had a little ham radio down time, as this relentless winter rewarded me with a late winter virus that laid me low for a few days. But, back on my feet and at the bench again, with some new … Continue reading

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Mysteries of the Triode Revealed.

Update: My understanding of inter-electrode capacitances was incorrect as described originally in this post, and I wanted to set the matter straight before I confuse someone else: The small inter-electrode capacitances in the tube present less and less reactance as … Continue reading

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