Tag Archives: Homebrew

A complete digression.

Happy New Year. Now that the holidays have passed and time has started to free up a bit, I’ve found my way back to the bench and started to resume experiments on a space charge tube regen, And while I … 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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Something Completely Different.

At the time I am writing this we may have enjoyed the last of a streak of really nasty winter weather here in the Northeast. Outside time has been generally unpleasant lately, and the inclination is to hunker down by … Continue reading

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