Optimus Siroco Model 160 (Part 1)
EF184
Once again, another Optimus amplifier has fallen into my hands, and this one will be the first I actually own, since unlike other Optimus models, this one was given to…
tubes
Building a Superheterodyne Receiver (Part 1)
A few days ago, I was given a French radio from the second half of the 1940s, with the peculiarity that it came completely disassembled—every piece separated. Faced with that…
Restoration of the Iberia T-2161 television, part 2 and conclusion
Once I had tested the tubes (and while waiting to get new ones to replace those that were completely dead, as I showed in the first part), I went ahead…
Guitar amplifier with tremolo using ECC81 (12AT7), ECL86 (or PCL86), and EZ81.
This small amplifier project began thanks to a blog reader, Sergio, who contacted me via email to see if I could help him design a small guitar practice amp using…
Restoration of the Iberia T-2161 TV, Part 1
Continuing with the restoration of the television, the first step I take is to check some of its valves using the μTracer3+: EF183 valve: As can be seen in the…
Iberia T-2161 tube TV
This TV came into my hands through a local online ad — I saw it at a good price and immediately thought it had to be mine. A valve (tube)…
μTracer3+ tube tester/curve tracer
For a long time now, I’ve been wanting to have a tube tester—something I’ve never owned—and also a vacuum tube curve tracer, since both would be incredibly useful for me.…
Second Pulse Counting FM Receiver
After building the previous FM valve receiver, I recently constructed another one based on it—this time deviating a bit from the original design… using P-series television tubes, the kind that…
Pulse Counting FM receiver
Here is my latest build: a vacuum tube FM superheterodyne receiver.This project was born out of frustration with medium wave (AM) broadcasting: the constant parasitic noise, the lack of stations,…
Building a Mullard 5-10 amplifier
As a summer project, I set out to build a Mullard 5-10 type amplifier using recycled materials I had in my workshop, and thus this amplifier was born. The chassis…