Reviving a 1970s valve radio
Replacing the wax capacitors one at a time, reforming the electrolytics on a variac, and the slow patience of aligning the IF stages by ear.
A repair workbench log
Short write-ups from a home electronics bench: what came in broken, what the meter said, and what finally brought it back. Mostly radios, power supplies, and old test gear. Updated whenever a job is worth recording.
A bench supply that hummed
Tracking a 50 Hz hum to a dry filter capacitor and a loose ground lug, with a reminder to discharge the big cans before probing.
Cold solder joints under the microscope
What a cracked joint actually looks like at 20×, why flux matters more than temperature, and a short checklist for reflowing a row of pins.