Tag Archives: building

The QRP Blowtorch Rides Again

Posted on August 4, 2015 by n2htt

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

Posted on April 25, 2015 by n2htt

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.

Posted on April 19, 2015 by n2htt

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?

Posted on April 3, 2015 by n2htt

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.

Posted on March 16, 2015 by n2htt

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.

Posted on March 8, 2015 by n2htt

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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Rosetta Stone.

Posted on February 26, 2015 by n2htt

Lately I’ve been scouring the Internet for web pages and circuits about tube regens. The more circuits I find, the more fascinated I become by these simple yet demonstrably effective receivers. There are definitely several “families” that these circuits fall … Continue reading →

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Bet you can’t build just one.

Posted on February 8, 2015 by n2htt

After the building frenzy that resulted in the completion of the 40M WBR regen, I was left with another entirely functional WBR on Board #2. This one consisted of the beautiful AF Stage v2, hooked up to the funky but … Continue reading →

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Can I hear you now?

Posted on January 28, 2015 by n2htt

Almost immediately after finishing the two-tube transmitter last spring, I began to think “Gee, wouldn’t it be great to build a receiver from scratch, so I could have an entirely homebrew station?” Apparently this kind of self-destructive thinking is a … Continue reading →

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But wait, there’s more!

Posted on January 14, 2015 by n2htt

About that regen… At the beginning of November 2014 I’d started collecting parts and begun the build of a WBR Regenerative Receiver. After building two (now three counting the Mighty Mite) transmitters, I was feeling a powerful urge to put … Continue reading →

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