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…
AM
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…
Analysis of the “Personal AM Transmitter” circuit
A few days ago, a reader of the blog contacted me asking for help figuring out why a vacuum tube AM transmitter circuit he had built—following the instructions from an…
Low power AM transmitter
This small single-tube transmitter is designed to broadcast any audio source on the AM band, so that various programs can be heard on all old radios that only have the…
RCA Q10
This interesting radio was given to me for repair by a teacher. She explained that it had belonged to her grandfather, and when it broke down, her mother tried to…
Philips BE292U
This small radio was brought to me for repair as a birthday gift for a friend’s parents — he wanted to give them the radio in working condition. At first…
Philips BX580A
When I bought this radio, it was completely dead — only a dial light would dimly turn on, the tubes didn’t seem to light up, and I started to smell…
Philips B3X02A
This tabletop radio was working perfectly when I bought it. However, as it was being used, it developed some minor faults, which I fixed as they appeared. This radio has…