Roselson Stereoletta (Part 1)
EF184
The Roselson Stereoletta is a radio-record player cabinet manufactured in Spain during the 1960s–70s by the Roselson company, based in Barcelona. It was relatively popular at the time and was…
ECL86
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…
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,…