Daily Archives: April 5, 2011

Refurbishing Vintage Sansui SP2500 Speakers (Crossover Repair)

Posted on April 5, 2011 by retrovoltage

Edited to add, June 2026: This was written several years before even my first commercial repair. I certainly wouldn’t mount the caps that way nowadays, but it made sense at the time! Back then, I was more worried about damaging … Continue reading →

Posted in Electronics, Projects, Vintage | Tagged , , , , , , , | 38 Comments

Showcase: Homemade 1930s-Style AM Radio Transmitter

Posted on April 5, 2011 by retrovoltage

Radio hobbyist Jon the Grimm built this beautiful “homebrew” AM transmitter using tube technology, in the style of an original 1930s radio transmitter. Operating under Part 15 regulations, his transmitter has achieved a short range – perfect for feeding modern … Continue reading →

Posted in Collections, Commentary, Radios and Tubes | Tagged , , , , , , | 6 Comments