Monthly Archives: February 2016

Bose® 901 Series II Active Equalizer #68953 Repair

This Bose® 901 Series II Active Equalizer was originally a European unit, designed for a 240V mains supply. Most if not all 240V equalizers with U.S. style plugs were sold on military bases in Germany and elsewhere, and returned with their … Continue reading

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Bose® 901 Series II Active Equalizer #64364 Overhaul

This Series II Bose® Active Equalizer came through the shop. It had suffered age-related failures in its electrolytic capacitors, and the resistors had drifted with age and moisture to produce the wrong curves. Fortunately, it’s nothing some maintenance can’t solve! … Continue reading

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New Bench Storage

Some pegboards, and wall mounting some parts bins, really cleaned up the benchtop!

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Watch: a home machinist makes a clock from scratch, right down to the screws and washers

This is up there with Claude Paillard creating early 1920s-style triode vacuum tubes entirely by hand in his home workshop: Chris from Clickspring is building a skeleton clock from scratch using a home machinist’s shop, and documenting it in lavish, hypnotic … Continue reading

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NOS Akai Vintage Stereo Setup Unboxing

A gentleman found a stack of vintage 1982 Akai stereo components in their original packaging, and takes us through a short unboxing and setup. It looks like he’s found a record player, equalizer, tape deck, tuner, and integrated amplifier. Can’t be … Continue reading

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555 timer teardown (and a Retrovoltage drum trigger project)

Ken Shirriff’s blog has a fantastic and detailed teardown of a 555 timer, the ubiquitous decades-old timer circuit that turns up in so many places: If you’ve played around with electronic circuits, you probably know the 555 timer integrated circuit, … Continue reading

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Antique Radio Shop near Kunming, Yunan, China

My friends over at Crimson Lotus Tea sent me this photo of an antique radio shop near Kunming, Yunan in China they ran into during a recent trip. They’re stacked to the ceiling in the shadows. Looks like a fun … Continue reading

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