What Are We Rebuilding?

By Cliff Potts, CSO, and Editor-in-Chief of WPS News

Baybay City, Leyte, Philippines — June 5, 2026

In high school, I studied electronics during the transition from vacuum tubes to solid-state devices. I learned enough to understand the basics, but not enough to become an engineer. Later, I earned a degree in Telecommunications Management, which taught me far more about communications systems than electronic design. Like a lot of knowledge acquired decades ago, much of what I learned about electronics has faded with time.

Recently, I found myself looking at old vacuum tubes and wondering how much of that world has been forgotten. Electronics did not begin with microchips, smartphones, or the Internet. It began with wires, coils, capacitors, vacuum tubes, radio transmitters, and people trying to solve practical problems with the tools they had available.

This series is an opportunity to rediscover that knowledge together. We will start with the basics and work our way forward, exploring the technologies that built the modern world. Along the way, we will learn how radios worked, how signals traveled, how information moved across continents, and how much of that knowledge can still be understood, repaired, and rebuilt today.

I am calling this series Electronic Archaeology because that is exactly what we are doing. Archaeologists dig through layers of dirt to understand lost civilizations. We will dig through layers of technology to understand the foundations of the electronic age.

Most people carry devices that would have seemed like science fiction a generation ago. Phones contain billions of transistors. Computers perform calculations that once required entire rooms of equipment. Yet very few of us understand the steps that led from the first experiments with electricity to the modern world.

That is not a criticism. Modern technology has become extraordinarily complex. Most of us use these tools without needing to understand every detail of how they work. The problem is that knowledge can disappear when nobody bothers to preserve it.

The goal of this series is not nostalgia. It is understanding.

One way to think about the project is through a simple thought experiment. Imagine that a modern engineer found himself cut off from modern manufacturing and supply chains. How much technology could be rebuilt? Could we generate electricity? Could we build a radio receiver? Could we transmit information? Could we create sensors to measure the world around us?

Science fiction fans might recognize this as a variation of the tricorder problem. In Star Trek, a tricorder combines communications, sensing, navigation, measurement, and information processing into a single handheld device. We are not going to build a tricorder. What we are going to do is examine the long chain of discoveries and inventions that eventually made such a device imaginable.

To get there, we must begin at the beginning.

Over the coming weeks we will examine electricity, resistors, capacitors, magnetism, induction, vacuum tubes, radio receivers, transmitters, antennas, and the systems that allowed information to move across oceans and continents long before the Internet existed.

Our destination is not a specific machine. Our destination is understanding.

Before we can build anything, however, we need to answer the most basic question in electronics.

What is electricity?

That is where we will begin next week.

If this work helps you understand what’s happening, help me keep it going: https://www.patreon.com/cw/WPSNews

For more from Cliff Potts, see https://cliffpotts.org

References

Campbell, J. (2009). The hero with a thousand faces (3rd ed.). New World Library.

National Air and Space Museum. (n.d.). Communications technology timeline. Smithsonian Institution.

IEEE History Center. (n.d.). Milestones in electrical engineering and computing. Institute of Electrical and Electronics Engineers.

#ElectronicArchaeology #electronicsHistory #engineeringEducation #radioCommunications #technologyHistory #vacuumTubes #WPSNews
From Compactrons to Nuvistors: Vacuum Tubes’ Last Hurrah

Many thanks to SWLing Post contributor Dennis Dura, who shares this article from Hackaday that explores the fascinating “last gasp” innovations of vacuum tube technology long after transistors had …

The SWLing Post
Ah, yes, an article that promises to unravel the mysteries of ancient tech, yet delivers the digital equivalent of a closed door: "Enable #JavaScript and #cookies to continue." 😂 Because, of course, when learning about vacuum tubes, one's first task is to master cookie settings. 🍪🔌
https://www.construction-physics.com/p/the-surprisingly-long-life-of-the #ancienttech #digitalhumor #vacuumtubes #techmysteries #HackerNews #ngated
The Surprisingly Long Life of the Vacuum Tube

The last several decades of technological progress have, in large part, been about finding more and more things we can do with semiconductors and the technology for producing them.

Construction Physics

I started wiring the AC side of this preamp and realized I was out of black wire which is of course what you used to designate the hot leg in America.

#PMillettBuild #Audio #MicPreamp #VacuumTubes #TubePreBuild #ACWiring #220or221

Almost all of the audio wiring is done in this now. Finished it today. What's left is the AC wiring, which I really can't do until I get the front panel. Reason being one of the items mounted to the front panel attaches from the outside.

#PMillettBuild #Audio #MicPreamp #VacuumTubes #TubePreBuild

I did a little more wiring on this tube mic preamp. It's almost completely wired. The panel you see is only a stand-in to make sure all of the switches and knobbies would fit without issue. The panel is the right size with the right holes that a friend with a waterjet at his metalshop cut for me for testing purposes. The real front panel will be thicker (either 3mm or 1/8th inch) and decorated with color and lettering and such.

#PMillettBuild #Audio #MicPreamp #VacuumTubes #TubePreBuild

The Nizhny Novgorod Radio Laboratory (NNRL).

Imagine it is June 1918. The young Soviet Republic, surrounded by enemies on all sides and struggling to find food for its cities, establishes a radio laboratory at the Tver radio station. The development of technology was necessary from both an economic and a political point of view.

But a small workshop with outdated equipment did not allow them to work at the required level. Therefore, it was decided to move the laboratory to Nizhny Novgorod.

The scientists at the radio laboratory worked on establishing vacuum tube production and developing radiotelephony.

Today, a museum dedicated to the history of the NNRL operates here. The museum’s exhibition contains many original devices and samples of radio equipment.

For me, this museum is a place where I feel inspired by human genius. I look at these tube assemblies, at the microchips, and remember the saying: “If aviation had developed at the same pace, today an airplane would be the size of a matchbox and could fly around the globe in one hour.”
#radiolab #NizhnyNovgorod #retrocomputing #microelectronics #radioelectronics #vacuumtubes

I can't decide is on v2 of my Millett tube preamp I should use ON and OFF at the power switch or 1 and 0.

#Audio #Preamp #VacuumTubes #Valves #On #Off #1 #0

Restoring The Soul Of A 1940s Radio

Although we do often see projects that take antiques and replace some or all of their components with modern equipment, we can also sympathize with the view that (when possible and practical) certa…

Hackaday

Mr. Carlson acquired an instrument tuner. It doesn't just use vacuum tubes, it uses vacuum tubes, a custom pulsing neon tube, _multiple_ very custom transformers, a giant hidden reference tuning fork, a motor, and a 12-speed transmission gearbox, and it came to him fully working and _recently in service_.

Basically if you're into holy shit old electrics, you will probably enjoy this:

https://www.youtube.com/watch?v=Stxd_YMHF3U

(for reference, you can get phone apps for this, or you can buy little dedicated standalone devices the size of... idk, a thick credit card, or also the kind that's smaller and has a clip pickup that attaches to your instrument head. BUT NOT IN 1930)

#electronics #vintage #VacuumTube #VacuumTubes #MrCarlson #tuner #InstrumentTuner

Electromechanical Marvel - The Stroboconn Listens! See How It Works!

YouTube